def _NACA5cambercurve(self, MaxCamberLocFracChord, DesignLiftCoefficient):
# Generates the camber curve of a NACA 5-digit airfoil
xmc = MaxCamberLocFracChord
# Determine the transition point m that separates the polynomial
# forward section from the linear aft section
R = act.cubic(-3, 6*xmc, -3*xmc**2)
m = R[2].real
# Sampling the chord line
ChordCoord, NCosPoints = act.coslin(xmc)
# As per equation (A-13) in Bill Mason's Geometry for
# Aerodynamicists
QQ = (3*m-7*m**2+8*m**3-4*m**4) / (math.sqrt(m*(1-m))) - 3/2*(1-2*m)*(math.pi/2-math.asin(1-2*m))
k1 = 6*DesignLiftCoefficient/QQ
# Compute the two sections of the camber curve and its slope
zcam = []
dzcamdx = []
for cc in ChordCoord[0:NCosPoints]:
list.append(zcam, (1/6)*k1*(cc**3 - 3*m*cc**2 + m**2*(3-m)*cc))
list.append(dzcamdx, (1/6)*k1*(3*cc**2-6*m*cc+m**2*(3-m)))
for cc in ChordCoord[NCosPoints:]:
list.append(zcam, (1/6)*k1*m**3*(1-cc))
list.append(dzcamdx, -(1/6)*m**3);
return ChordCoord, zcam, dzcamdx
def CockpitWindowContours(Height=1.620, Depth=5):
P1 = [0.000, 0.076, Height - 1.620 + 2.194]
P2 = [0.000, 0.852, Height - 1.620 + 2.290]
P3 = [0.000, 0.904, Height + 0.037]
P4 = [0.000, 0.076, Height]
CWC1 = rs.AddPolyline([P1, P2, P3, P4, P1])
rs.SelectObject(CWC1)
rs.Command("_FilletCorners 0.08 ")
P1 = [0.000, 0.951, Height - 1.620 + 2.289]
P2 = [0.000, 1.343, Height - 1.620 + 2.224]
P3 = [0.000, 1.634, Height - 1.620 + 1.773]
P4 = [0.000, 1.557, Height - 1.620 + 1.588]
P5 = [0.000, 1.027, Height - 1.620 + 1.671]
CWC2 = rs.AddPolyline([P1, P2, P3, P4, P5, P1])
rs.SelectObject(CWC2)
rs.Command("_FilletCorners 0.08 ")
CWC3 = act.MirrorObjectXZ(CWC1)
CWC4 = act.MirrorObjectXZ(CWC2)
ExtPathId = rs.AddLine([0, 0, 0], [Depth, 0, 0])
CWC1s = rs.ExtrudeCurve(CWC1, ExtPathId)
CWC2s = rs.ExtrudeCurve(CWC2, ExtPathId)
CWC3s = rs.ExtrudeCurve(CWC3, ExtPathId)
CWC4s = rs.ExtrudeCurve(CWC4, ExtPathId)
rs.DeleteObjects([CWC1, CWC2, CWC3, CWC4, ExtPathId])
return CWC1s, CWC2s, CWC3s, CWC4s
def _NACA5cambercurve(self, MaxCamberLocFracChord, DesignLiftCoefficient):
# Generates the camber curve of a NACA 5-digit airfoil
xmc = MaxCamberLocFracChord
# Determine the transition point m that separates the polynomial
# forward section from the linear aft section
R = act.cubic(-3, 6 * xmc, -3 * xmc**2)
m = R[2].real
# Sampling the chord line
ChordCoord, NCosPoints = act.coslin(xmc)
# As per equation (A-13) in Bill Mason's Geometry for
# Aerodynamicists
QQ = (3 * m - 7 * m**2 + 8 * m**3 - 4 * m**4) / (math.sqrt(
m * (1 - m))) - 3 / 2 * (1 - 2 * m) * (math.pi / 2 -
math.asin(1 - 2 * m))
k1 = 6 * DesignLiftCoefficient / QQ
# Compute the two sections of the camber curve and its slope
zcam = []
dzcamdx = []
for cc in ChordCoord[0:NCosPoints]:
list.append(zcam, (1 / 6) * k1 * (cc**3 - 3 * m * cc**2 + m**2 *
(3 - m) * cc))
list.append(dzcamdx, (1 / 6) * k1 *
(3 * cc**2 - 6 * m * cc + m**2 * (3 - m)))
for cc in ChordCoord[NCosPoints:]:
list.append(zcam, (1 / 6) * k1 * m**3 * (1 - cc))
list.append(dzcamdx, -(1 / 6) * m**3)
return ChordCoord, zcam, dzcamdx
def _NACA4cambercurve(self, MaxCamberLocTenthChord, MaxCamberPercChord):
""" Generates the camber curve of a NACA 4-digit airfoil
"""
# Using the original notation of Jacobs et al.(1933)
xmc = MaxCamberLocTenthChord / 10.0
zcammax = MaxCamberPercChord / 100.0
# Protect against division by zero on airfoils like NACA0012
if xmc == 0:
xmc = 0.2
# Sampling the chord line
ChordCoord, NCosPoints = act.coslin(xmc)
# Compute the two sections of the camber curve and its slope
zcam = []
dzcamdx = []
for cc in ChordCoord[0:NCosPoints]:
list.append(zcam, (zcammax / (xmc**2)) * (2 * xmc * cc - cc**2))
list.append(dzcamdx, (zcammax / xmc**2) * (2 * xmc - 2 * cc))
for cc in ChordCoord[NCosPoints:]:
list.append(zcam, (zcammax / ((1 - xmc)**2)) *
(1 - 2 * xmc + 2 * xmc * cc - (cc**2)))
list.append(dzcamdx, (zcammax / (1 - xmc)**2) * (2 * xmc - 2 * cc))
return ChordCoord, zcam, dzcamdx
def _NACA4cambercurve(self, MaxCamberLocTenthChord, MaxCamberPercChord):
""" Generates the camber curve of a NACA 4-digit airfoil
"""
# Using the original notation of Jacobs et al.(1933)
xmc = MaxCamberLocTenthChord /10.0;
zcammax = MaxCamberPercChord /100.0;
# Protect against division by zero on airfoils like NACA0012
if xmc==0:
xmc = 0.2
# Sampling the chord line
ChordCoord, NCosPoints = act.coslin(xmc)
# Compute the two sections of the camber curve and its slope
zcam = []
dzcamdx = []
for cc in ChordCoord[0:NCosPoints]:
list.append(zcam, (zcammax/(xmc ** 2))*(2*xmc*cc - cc ** 2))
list.append(dzcamdx, (zcammax/xmc ** 2)*(2*xmc - 2*cc))
for cc in ChordCoord[NCosPoints:]:
list.append(zcam, (zcammax/((1-xmc) ** 2))*(1-2*xmc+2*xmc*cc-(cc ** 2)))
list.append(dzcamdx, (zcammax/(1-xmc) ** 2)*(2*xmc - 2*cc));
return ChordCoord, zcam, dzcamdx
def _BuildSurfacePoints(self, ChordFactor, ScaleFactor):
LEPoints = self._GenerateLeadingEdge()
SurfacePntsUp = []
SurfacePntsDown = []
Sections = []
# SurfacePntstoAdd=[]
Eps = np.linspace(0, 1, self.NPaero_span + 1)
Sections = [
self.AirfoilFunct(Eps[i], LEPoints[i], self.ChordFunct,
ChordFactor, self.DihedralFunct,
self.TwistFunct).Curve
for i in xrange(self.NPaero_span + 1)
]
numb = 0
for num in xrange(self.NPaero_span + 1):
section = Sections[num]
sectionPnt = act.Uniform_Points_on_Curve(section,
self.NPaero_chord)
numb = numb + 1
for numm in xrange(1, self.NPaero_chord + 1):
print(sectionPnt[numm - 1].Y())
print(sectionPnt[numm - 1].X())
edgePnts = act.make_vertex(sectionPnt[numm - 1])
if self.ScaleFactor != 1:
Origin = gp_Pnt(0., 0., 0.)
Pnts = act.scale_uniformal(edgePnts, Origin,
self.ScaleFactor)
if numm <= (self.NPaero_chord - 1) / 2 + 1:
SurfacePntsUp.append(Pnts)
if numm == (self.NPaero_chord - 1) / 2 + 1:
SurfacePntsDown.append(Pnts)
elif numm > (self.NPaero_chord - 1) / 2 + 1:
# SurfacePntsDown.append(SurfacePntstoAdd)
SurfacePntsDown.append(Pnts)
# SurfacePntsDown=SurfacePntsD+SurfacePntstoAdd
# numbb=numbb+1
# if self.ScaleFactor!= 1:
# Origin = gp_Pnt(0., 0., 0.)
# SurfacePnts=act.scale_uniformal(SurfacePnts, Origin, self.ScaleFactor)
print(np.shape(SurfacePntsUp))
print(np.shape(SurfacePntsDown))
return SurfacePntsUp, SurfacePntsDown
def myChordFunctionJetstream(Epsilon):
# User-defined function describing the variation of chord as a function of
# the leading edge coordinate
ChordLengths = [1, 0.333]
EpsArray = [0, 1]
f = act.linear_interpolation(EpsArray, ChordLengths)
return f(Epsilon)
def mySweepAngleFunctionAirliner(Epsilon):
# User-defined function describing the variation of sweep angle as a function
# of the leading edge coordinate
SweepAngles = [90, 87, 35, 35, 35, 35, 35, 35, 35, 35, 80]
EpsArray = []
for i in range(0, 11):
list.append(EpsArray, float(i)/10)
f = act.linear_interpolation(EpsArray, SweepAngles)
return f(Epsilon)
def myChordFunctionAirliner(Epsilon):
# User-defined function describing the variation of chord as a function of
# the leading edge coordinate
ChordLengths = [0.5, 0.3792, 0.2867, 0.232, 0.1763, 0.1393, 0.1155, 0.093,
0.0713, 0.055, 0.007]
EpsArray = []
for i in range(0, 11):
list.append(EpsArray, float(i)/10)
f = act.linear_interpolation(EpsArray, ChordLengths)
return f(Epsilon)
def FuselageOML(NoseLengthRatio=0.182,
TailLengthRatio=0.293,
Scaling=[55.902, 55.902, 55.902],
NoseCoordinates=[0, 0, 0],
CylindricalMidSection=False,
SimplificationReqd=False):
# Instantiates a parametric fuselage outer mould line (OML) geometry for a given
# set of design variables.
FuselageOMLSurf, SternPoint = _BuildFuselageOML(NoseLengthRatio,
TailLengthRatio,
CylindricalMidSection,
SimplificationReqd)
if not (FuselageOMLSurf) or FuselageOMLSurf is None:
return
ScalingF = [0, 0, 0]
ScalingF[0] = Scaling[0] / 55.902
ScalingF[1] = Scaling[1] / 55.902
ScalingF[2] = Scaling[2] / 55.902
# Overall scaling
FuselageOMLSurf = act.ScaleObjectWorld000(FuselageOMLSurf, ScalingF)
# A few other ways of performing the scaling...
# Variant one: this depends on the current CPlane!
# FuselageOMLSurf = rs.ScaleObject(FuselageOMLSurf, (0,0,0), Scaling)
# Variant two: define plane in World coordinates
#P = rs.PlaneFromFrame((0,0,0),(1,0,0),(0,1,0))
#TransfMatrix = Rhino.Geometry.Transform.Scale(P, Scaling[0], Scaling[1], Scaling[2])
#FuselageOMLSurf = rs.TransformObjects(FuselageOMLSurf, TransfMatrix)
# Variant three: World coordinate system based scaling
#xform = rs.XformScale(Scaling)
#FuselageOMLSurf = rs.TransformObjects(FuselageOMLSurf, xform)
SternPoint[0] = SternPoint[0] * ScalingF[0]
SternPoint[1] = SternPoint[1] * ScalingF[1]
SternPoint[2] = SternPoint[2] * ScalingF[2]
# Positioning
MoveVec = rs.VectorCreate(NoseCoordinates, [0, 0, 0])
FuselageOMLSurf = rs.MoveObject(FuselageOMLSurf, MoveVec)
SternPoint[0] = SternPoint[0] + NoseCoordinates[0]
SternPoint[1] = SternPoint[1] + NoseCoordinates[1]
SternPoint[2] = SternPoint[2] + NoseCoordinates[2]
return FuselageOMLSurf, SternPoint
def _FuselageLongitudinalGuideCurves(NoseLengthRatio, TailLengthRatio):
# Internal function. Defines the four longitudinal curves that outline the
# fuselage (outer mould line).
FSVU, FSVL = _AirlinerFuselageSideView(NoseLengthRatio, TailLengthRatio)
FSVUCurve = rs.AddCurve(FSVU)
FSVLCurve = rs.AddCurve(FSVL)
AFPVPort, NoseEndX, TailStartX = _AirlinerFuselagePlanView(
NoseLengthRatio, TailLengthRatio)
# Generate plan view
PlanPortCurve = rs.AddCurve(AFPVPort)
# How wide is the fuselage?
(Xmin, Ymin, Zmin, Xmax, Ymax, Zmax) = act.ObjectsExtents(PlanPortCurve)
# Generate a slightly wider projection surface
FSVMeanCurve = rs.MeanCurve(FSVUCurve, FSVLCurve)
RuleLinePort = rs.AddLine((0, 0, 0), (0, -1.1 * abs(Ymax - Ymin), 0))
FSVMCEP = rs.CurveEndPoint(FSVMeanCurve)
AftLoftEdgePort = rs.CopyObject(RuleLinePort, FSVMCEP)
ParallelLoftEdgePort = rs.CopyObject(FSVMeanCurve,
(0, -1.1 * abs(Ymax - Ymin), 0))
LSPort = rs.AddSweep2((FSVMeanCurve, ParallelLoftEdgePort),
(RuleLinePort, AftLoftEdgePort))
# Project the plan view onto the mean surface
PortCurve = rs.ProjectCurveToSurface(PlanPortCurve, LSPort, (0, 0, 100))
# House-keeping
rs.DeleteObjects([
LSPort, PlanPortCurve, ParallelLoftEdgePort, RuleLinePort,
AftLoftEdgePort
])
# Tidy up the mean curve. This is necessary for a smooth result and removing
# it can render the algorithm unstable. However, FitCurve itself may sometimes
# be slightly unstable.
FLength = abs(Xmax - Xmin) # establish a reference length
PortCurveSimplified = rs.FitCurve(PortCurve,
distance_tolerance=FLength * 0.001)
StarboardCurveSimplified = act.MirrorObjectXZ(PortCurveSimplified)
rs.DeleteObject(PortCurve)
# Compute the actual end points of the longitudinal curves
(Xmin, Ymin, Zmin, Xmax1, Ymax,
Zmax) = act.ObjectsExtents(StarboardCurveSimplified)
(Xmin, Ymin, Zmin, Xmax2, Ymax,
Zmax) = act.ObjectsExtents(PortCurveSimplified)
(Xmin, Ymin, Zmin, Xmax3, Ymax, Zmax) = act.ObjectsExtents(FSVUCurve)
(Xmin, Ymin, Zmin, Xmax4, Ymax, Zmax) = act.ObjectsExtents(FSVLCurve)
EndX = min([Xmax1, Xmax2, Xmax3, Xmax4])
return StarboardCurveSimplified, PortCurveSimplified, FSVUCurve, FSVLCurve, FSVMeanCurve, NoseEndX, TailStartX, EndX
def GenerateLiftingSurface(self, ChordFactor, ScaleFactor, OptimizeChordScale=0):
# This is the main method of this class. It builds a lifting surface
# (wing, tailplane, etc.) with the given ChordFactor and ScaleFactor or
# an optimized ChordFactor and ScaleFactor, with the local search started
# from the two given values.
x0 = [ChordFactor, ScaleFactor]
if OptimizeChordScale:
self._CheckOptParCorrectlySpec()
self._NormaliseWeightings()
self._PrintTargetsAndWeights()
print("Optimizing scale factors...")
# An iterative local hillclimber type optimizer is needed here. One
# option might be SciPy's fmin as below:
# x0, fopt, iter, funcalls, warnflag, allvecs = scipy.optimize.fmin(self._LSObjective, x0, retall=True, xtol=0.025, full_output=True)
# However, SciPy is not supported on 64-bit Rhino installations, so
# so here we use an alternative: a simple evoltionary optimizer
# included with AirCONICS_tools.
MaxIter = 50
xtol = 0.025
deltax = [x0[0]*0.25,x0[1]*0.25]
x0, fopt = act.boxevopmin2d(self._LSObjective, x0, deltax, xtol, MaxIter)
x0[0] = abs(x0[0])
x0[1] = abs(x0[1])
print("Optimum chord factor %5.3f, optimum scale factor %5.3f" % (x0[0], x0[1]))
LS, ActualSemiSpan, LSP_area, RootChord, AR, WingTip = self._BuildLS(x0[0], x0[1])
self._ClearConstructionGeometry()
# Moving the wing into position
AP = rs.AddPoint(self.ApexPoint)
MoveVec = rs.VectorCreate(AP, (0,0,0))
rs.MoveObject(LS, MoveVec)
if WingTip:
rs.MoveObject(WingTip, MoveVec)
rs.DeleteObject(AP)
# FINAL REPORT ON THE COMPLETED SURFACE
SA = rs.SurfaceArea(LS)
print("Wing complete. Key features (all related to both wings):")
print("Proj.area: %5.4f Wet.area: %5.4f Span:%5.4f Aspect ratio: %5.4f Root chord: %5.4f" % (2*LSP_area, 2.0*SA[0], 2.0*ActualSemiSpan, AR, RootChord))
return LS, ActualSemiSpan, LSP_area, RootChord, AR, WingTip
def GenerateLiftingSurface(self, ChordFactor, ScaleFactor, OptimizeChordScale=0):
# This is the main method of this class. It builds a lifting surface
# (wing, tailplane, etc.) with the given ChordFactor and ScaleFactor or
# an optimized ChordFactor and ScaleFactor, with the local search started
# from the two given values.
x0 = [ChordFactor, ScaleFactor]
if OptimizeChordScale:
self._CheckOptParCorrectlySpec()
self._NormaliseWeightings()
self._PrintTargetsAndWeights()
print("Optimizing scale factors...")
# An iterative local hillclimber type optimizer is needed here. One
# option might be SciPy's fmin as below:
# x0, fopt, iter, funcalls, warnflag, allvecs = scipy.optimize.fmin(self._LSObjective, x0, retall=True, xtol=0.025, full_output=True)
# However, SciPy is not supported on 64-bit Rhino installations, so
# so here we use an alternative: a simple evoltionary optimizer
# included with AirCONICS_tools.
MaxIter = 50
xtol = 0.025
deltax = [x0[0]*0.25,x0[1]*0.25]
x0, fopt = act.boxevopmin2d(self._LSObjective, x0, deltax, xtol, MaxIter)
x0[0] = abs(x0[0])
x0[1] = abs(x0[1])
print("Optimum chord factor %5.3f, optimum scale factor %5.3f" % (x0[0], x0[1]))
LS, ActualSemiSpan, LSP_area, RootChord, AR, WingTip = self._BuildLS(x0[0], x0[1])
self._ClearConstructionGeometry()
# Moving the wing into position
AP = rs.AddPoint(self.ApexPoint)
MoveVec = rs.VectorCreate(AP, (0,0,0))
rs.MoveObject(LS, MoveVec)
if WingTip:
rs.MoveObject(WingTip, MoveVec)
rs.DeleteObject(AP)
# FINAL REPORT ON THE COMPLETED SURFACE
SA = rs.SurfaceArea(LS)
print("Wing complete. Key features (all related to both wings):")
print("Proj.area: %5.4f Wet.area: %5.4f Span:%5.4f Aspect ratio: %5.4f Root chord: %5.4f" % (2*LSP_area, 2.0*SA[0], 2.0*ActualSemiSpan, AR, RootChord))
return LS, ActualSemiSpan, LSP_area, RootChord, AR, WingTip
def _BuildLS(self, ChordFactor, ScaleFactor):
"""Generates a tentative lifting surface, given the general,
nondimensional parameters of the object (variations of chord length,
dihedral, etc.) and the two scaling factors.
Parameters
----------
ChordFactor - float
Factor againt which the standard shape is scaled in the chordwise
direction
ScaleFactor - float
Factor againt which the standard shape is scaled in the world
coordinates
Returns
-------
LS : TopoDS_Shape
The generated Lifting surface
ActualSemiSpan : scalar
TODO: currently not calculated, None is returned
LSP_area : scalar
TODO: currently not calculated, None is returned
AR : scalar
TODO: currently not calculated, None is returned
WingTip : TopoDS face or shape
TODO: currently not calculated, None is returned
"""
LEPoints = self._GenerateLeadingEdge()
Sections = []
# TODO: These lists are used for when the curve has been smoothed or
# the loft has failed, neither of which have been implemented yet
# ProjectedSections = []
# TEPoints_u = []
# TEPoints_l = []
Eps = np.linspace(0, 1, self.SegmentNo + 1)
Sections = [
self.AirfoilFunct(Eps[i], LEPoints[i], self.ChordFunct,
ChordFactor, self.DihedralFunct,
self.TwistFunct).Curve
for i in xrange(self.SegmentNo + 1)
]
self._Sections = Sections # I used from debugging - remove it?
# TODO: Implement chord projection and Curve start/end points
# to rescale smoothed curves and for secondary loft methods
LS = act.AddSurfaceLoft(Sections,
max_degree=self._max_degree,
continuity=self._Cont)
if LS is None:
pass
WingTip = None
if self.TipRequired:
pass
# Scaling
if self.ScaleFactor != 1:
Origin = gp_Pnt(0., 0., 0.)
LS = act.scale_uniformal(LS, Origin, self.ScaleFactor)
# TODO: Wing tip scaling (TipRequired is not implemented yet)
if self.TipRequired and WingTip:
pass
self.RootChord = (self.ChordFunct(0) * ChordFactor) * ScaleFactor
# Temporarily set other variables as None until above TODO's are done
ActualSemiSpan = None
LSP_area = None
AR = None
return LS, ActualSemiSpan, LSP_area, AR, WingTip
def _TransformAirfoil(self, C):
# Internal function. Given a normal airfoil, unit chord, nose in origin,
# chord along x axis, applies scaling, rotations, positioning and smoothing
# Smoothing
for i in range(1, self.SmoothingIterations + 1):
rs.FairCurve(C)
# Find the actual leading edge point - the airfoil may have stretched as
# as a result of the smoothing or it may have been incorrectly defined
# through a series of coordinates
RefLine = rs.AddLine((-100, 0, -100), (-100, 0, 100))
ClosestPoints = rs.CurveClosestObject(RefLine, C)
P = rs.AddPoint(ClosestPoints[1])
MoveVec = rs.VectorCreate((0, 0, 0), P)
rs.MoveObject(C, MoveVec)
# Garbage collection
rs.DeleteObjects((RefLine, P))
# Now find the trailing edge points
PUpper = rs.CurveStartPoint(C)
PLower = rs.CurveEndPoint(C)
TECentre = ((PUpper[0] + PLower[0]) / 2, (PUpper[1] + PLower[1]) / 2,
(PUpper[2] + PLower[2]) / 2)
if PUpper[2] < PLower[2]:
print "Warning: the upper and lower surface intersect at the TE."
TECentrePoint = rs.AddPoint(TECentre)
AxisOfRotation = rs.VectorCreate((0, 0, 0), (0, 1, 0))
L1 = rs.AddLine((0, 0, 0), (1, 0, 0))
L2 = rs.AddLine((0, 0, 0), TECentrePoint)
AngRot = rs.Angle2(L1, L2)
# The angle returned by Angle2 is always positive so:
if TECentre[2] < 0:
rs.RotateObject(C, (0, 0, 0), AngRot[0], AxisOfRotation)
else:
rs.RotateObject(C, (0, 0, 0), -AngRot[0], AxisOfRotation)
# Garbage collection
rs.DeleteObjects((TECentrePoint, L1, L2))
# Find the trailing edge point again after rotating it onto the x axis
PUpper = rs.CurveStartPoint(C)
PLower = rs.CurveEndPoint(C)
TECentre = [(PUpper[0] + PLower[0]) / 2, (PUpper[1] + PLower[1]) / 2,
(PUpper[2] + PLower[2]) / 2]
ActualChordLength = TECentre[0]
# Scale the airfoil to unit chord
#rs.ScaleObject(C, (0,0,0), (1/ActualChordLength, 1, 1/ActualChordLength))
act.ScaleObjectWorld000(
C, (1 / ActualChordLength, 1, 1 / ActualChordLength))
# Now we can assume that airfoil is normalised to the unit chord, with
# its leading edge in the origin, trailing edge in (1,0,0)
Chrd = rs.AddLine((0, 0, 0), (1, 0, 0))
# Scaling
ScaleFact = (self.ChordLength, self.ChordLength, self.ChordLength)
# same as rs.ScaleObject(C, (0,0,0), ScaleFact)
act.ScaleObjectWorld000(C, ScaleFact)
# same as rs.ScaleObject(Chrd, (0,0,0), ScaleFact)
act.ScaleObjectWorld000(Chrd, ScaleFact)
# Twist
rs.RotateObject(C, (0, 0, 0), self.Twist,
rs.VectorCreate((0, 0, 0), (0, 1, 0)))
rs.RotateObject(Chrd, (0, 0, 0), self.Twist,
rs.VectorCreate((0, 0, 0), (0, 1, 0)))
# Dihedral
rs.RotateObject(C, (0, 0, 0), -self.Rotation,
rs.VectorCreate((0, 0, 0), (1, 0, 0)))
rs.RotateObject(Chrd, (0, 0, 0), -self.Rotation,
rs.VectorCreate((0, 0, 0), (1, 0, 0)))
# 3d positioning
MoveVec = rs.VectorCreate(self.LeadingEdgePoint, (0, 0, 0))
rs.MoveObject(C, MoveVec)
rs.MoveObject(Chrd, MoveVec)
return C, Chrd
def TurbofanNacelle(EngineSection,
Chord,
CentreLocation=[0, 0, 0],
ScarfAngle=3,
HighlightRadius=1.45,
MeanNacelleLength=5.67):
# The defaults yield a nacelle similar to that of an RR Trent 1000 / GEnx
HighlightDepth = 0.12 * MeanNacelleLength
SectionNo = 100
# Draw the nacelle with the centre of the intake highlight circle in 0,0,0
rs.EnableRedraw(False)
Highlight = rs.AddCircle3Pt((0, 0, HighlightRadius),
(0, -HighlightRadius, 0),
(0, 0, -HighlightRadius))
HighlightCutterCircle = rs.AddCircle3Pt((0, 0, HighlightRadius * 1.5),
(0, -HighlightRadius * 1.5, 0),
(0, 0, -HighlightRadius * 1.5))
# Fan disk for CFD boundary conditions
FanCircle = rs.CopyObject(Highlight, (MeanNacelleLength * 0.25, 0, 0))
FanDisk = rs.AddPlanarSrf(FanCircle)
# Aft outflow for CFD boundary conditions
BypassCircle = rs.CopyObject(Highlight, (MeanNacelleLength * 0.85, 0, 0))
BypassDisk = rs.AddPlanarSrf(BypassCircle)
rs.DeleteObjects([FanCircle, BypassCircle])
# Outflow cone
TailConeBasePoint = [MeanNacelleLength * 0.84, 0, 0]
TailConeApex = [MeanNacelleLength * 1.35, 0, 0]
TailConeRadius = HighlightRadius * 0.782
TailCone = rs.AddCone(TailConeBasePoint, TailConeApex, TailConeRadius)
# Spinner cone
SpinnerConeBasePoint = [MeanNacelleLength * 0.26, 0, 0]
SpinnerConeApex = [MeanNacelleLength * 0.08, 0, 0]
SpinnerConeRadius = MeanNacelleLength * 0.09
Spinner = rs.AddCone(SpinnerConeBasePoint, SpinnerConeApex,
SpinnerConeRadius)
# Tilt the intake
RotVec = rs.VectorCreate((0, 0, 0), (0, 1, 0))
Highlight = rs.RotateObject(Highlight, (0, 0, 0), ScarfAngle, axis=RotVec)
# Set up the disk for separating the intake lip later
HighlightCutterCircle = rs.RotateObject(HighlightCutterCircle, (0, 0, 0),
ScarfAngle,
axis=RotVec)
HighlightCutterDisk = rs.AddPlanarSrf(HighlightCutterCircle)
rs.DeleteObject(HighlightCutterCircle)
rs.MoveObject(HighlightCutterDisk, (HighlightDepth, 0, 0))
# Build the actual airfoil sections to define the nacelle
HighlightPointVector = rs.DivideCurve(Highlight, SectionNo)
Sections = []
TailPoints = []
Rotation = 0
Twist = 0
AirfoilSeligName = 'goe613'
SmoothingPasses = 1
for HighlightPoint in HighlightPointVector:
ChordLength = MeanNacelleLength - HighlightPoint.X
Af = primitives.Airfoil(HighlightPoint, ChordLength, Rotation, Twist,
airconics_setup.SeligPath)
AfCurve, Chrd = primitives.Airfoil.AddAirfoilFromSeligFile(
Af, AirfoilSeligName, SmoothingPasses)
rs.DeleteObject(Chrd)
P = rs.CurveEndPoint(AfCurve)
list.append(TailPoints, P)
AfCurve = act.AddTEtoOpenAirfoil(AfCurve)
list.append(Sections, AfCurve)
Rotation = Rotation + 360.0 / SectionNo
list.append(TailPoints, TailPoints[0])
# Build the actual nacelle OML surface
EndCircle = rs.AddInterpCurve(TailPoints)
Nacelle = rs.AddSweep2([Highlight, EndCircle], Sections, closed=True)
# Separate the lip
Cowling, HighlightSection = rs.SplitBrep(Nacelle, HighlightCutterDisk,
True)
# Now build the pylon between the engine and the specified chord on the wing
CP1 = [
MeanNacelleLength * 0.26 + CentreLocation[0], CentreLocation[1],
CentreLocation[2] + HighlightRadius * 0.1
]
CP2 = [
MeanNacelleLength * 0.4 + CentreLocation[0], CentreLocation[1],
HighlightRadius * 1.45 + CentreLocation[2]
]
CP3 = rs.CurveEndPoint(Chord)
rs.ReverseCurve(Chord)
CP4 = rs.CurveEndPoint(Chord)
# Move the engine into its actual place on the wing
rs.MoveObjects(
[HighlightSection, Cowling, FanDisk, BypassDisk, TailCone, Spinner],
CentreLocation)
# Pylon wireframe
PylonTop = rs.AddInterpCurve([CP1, CP2, CP3, CP4])
PylonAf = primitives.Airfoil(CP1, MeanNacelleLength * 1.35, 90, 0,
airconics_setup.SeligPath)
PylonAfCurve, PylonChord = primitives.Airfoil.AddNACA4(
PylonAf, 0, 0, 12, 3)
LowerTE = rs.CurveEndPoint(PylonChord)
PylonTE = rs.AddLine(LowerTE, CP4)
# Create the actual pylon surface
PylonLeft = rs.AddNetworkSrf([PylonTop, PylonAfCurve, PylonTE])
rs.MoveObject(PylonLeft, (0, -CentreLocation[1], 0))
PylonRight = act.MirrorObjectXZ(PylonLeft)
rs.MoveObject(PylonLeft, (0, CentreLocation[1], 0))
rs.MoveObject(PylonRight, (0, CentreLocation[1], 0))
PylonAfCurve = act.AddTEtoOpenAirfoil(PylonAfCurve)
PylonAfSrf = rs.AddPlanarSrf(PylonAfCurve)
# Assigning basic surface properties
act.AssignMaterial(Cowling, "ShinyBABlueMetal")
act.AssignMaterial(HighlightSection, "UnpaintedMetal")
act.AssignMaterial(TailCone, "UnpaintedMetal")
act.AssignMaterial(FanDisk, "FanDisk")
act.AssignMaterial(Spinner, "ShinyBlack")
act.AssignMaterial(BypassDisk, "FanDisk")
act.AssignMaterial(PylonLeft, "White_composite_external")
act.AssignMaterial(PylonRight, "White_composite_external")
# Clean-up
rs.DeleteObject(HighlightCutterDisk)
rs.DeleteObjects(Sections)
rs.DeleteObject(EndCircle)
rs.DeleteObject(Highlight)
rs.DeleteObjects([PylonTop, PylonAfCurve, PylonChord, PylonTE])
rs.Redraw()
TFEngine = [
Cowling, HighlightSection, TailCone, FanDisk, Spinner, BypassDisk
]
TFPylon = [PylonLeft, PylonRight, PylonAfSrf]
return TFEngine, TFPylon
tea.myAirfoilFunctionAirliner,
LooseSurf,
SegmentNo,
TipRequired=True)
ChordFactor = 1
ScaleFactor = 50
rs.EnableRedraw(False)
WingSurf, ActualSemiSpan, LSP_area, RootChord, AR, WingTip = Wing.GenerateLiftingSurface(
ChordFactor, ScaleFactor)
rs.EnableRedraw()
SpanStation = 0.3 # The engine is to be placed at 30% span
EngineDia = 2.9
NacelleLength = 1.95 * EngineDia
rs.EnableRedraw(False)
EngineSection, Chord = act.CutSect(WingSurf, SpanStation)
CEP = rs.CurveEndPoint(Chord)
# Variables controlling the position of the engine with respect to the wing
EngineCtrFwdOfLE = 0.98
EngineCtrBelowLE = 0.35
Scarf_deg = 4
# Now build the engine and its pylon
EngineStbd, PylonStbd = TurbofanNacelle(
EngineSection,
Chord,
CentreLocation=[
CEP.X - EngineCtrFwdOfLE * NacelleLength, CEP.Y,
CEP.Z - EngineCtrBelowLE * NacelleLength
],
def _BuildFuselageOML(NoseLengthRatio, TailLengthRatio, CylindricalMidSection, SimplificationReqd):
MaxFittingAttempts = 6
FittingAttempts = -1
NetworkSrfSettings = [
[35, 20, 15, 5, 20],
[35, 30, 15, 5, 20],
[35, 20, 15, 2, 20],
[30, 30, 15, 2, 20],
[30, 20, 15, 2, 20],
[25, 20, 15, 2, 20],
[20, 20, 15, 2, 20],
[15, 20, 15, 2, 20]]
StarboardCurve, PortCurve, FSVUCurve, FSVLCurve, FSVMeanCurve, NoseEndX, TailStartX, EndX = _FuselageLongitudinalGuideCurves(NoseLengthRatio, TailLengthRatio)
while FittingAttempts <= MaxFittingAttempts:
FittingAttempts = FittingAttempts + 1
# Construct array of cross section definition frames
SX0 = 0
Step01 = NetworkSrfSettings[FittingAttempts][0]
SX1 = 0.04*NoseEndX
Step12 = NetworkSrfSettings[FittingAttempts][1]
SX2 = SX1 + 0.25*NoseEndX
Step23 = NetworkSrfSettings[FittingAttempts][2]
SX3 = NoseEndX
Step34 = NetworkSrfSettings[FittingAttempts][3]
SX4 = TailStartX
Step45 = NetworkSrfSettings[FittingAttempts][4]
SX5 = EndX
print "Attempting network surface fit with network density setup ", NetworkSrfSettings[FittingAttempts][:]
Stations01 = act.pwfrange(SX0,SX1,max([Step01,2]))
Stations12 = act.pwfrange(SX1,SX2,max([Step12,2]))
Stations23 = act.pwfrange(SX2,SX3,max([Step23,2]))
Stations34 = act.pwfrange(SX3,SX4,max([Step34,2]))
Stations45 = act.pwfrange(SX4,SX5,max([Step45,2]))
StationRange = Stations01[:-1] + Stations12[:-1] + Stations23[:-1] + Stations34[:-1] + Stations45
C = []
FirstTime = True
for XStation in StationRange:
P = rs.PlaneFromPoints((XStation,0,0),(XStation,1,0),(XStation,0,1))
IP1 = rs.PlaneCurveIntersection(P,StarboardCurve)
IP2 = rs.PlaneCurveIntersection(P,FSVUCurve)
IP3 = rs.PlaneCurveIntersection(P,PortCurve)
IP4 = rs.PlaneCurveIntersection(P,FSVLCurve)
IPcentre = rs.PlaneCurveIntersection(P,FSVMeanCurve)
IPoint1 = rs.AddPoint(IP1[0][1])
IPoint2 = rs.AddPoint(IP2[0][1])
IPoint3 = rs.AddPoint(IP3[0][1])
IPoint4 = rs.AddPoint(IP4[0][1])
IPointCentre = rs.AddPoint(IPcentre[0][1])
PseudoDiameter = abs(IP4[0][1].Z-IP2[0][1].Z)
if CylindricalMidSection and NoseEndX < XStation < TailStartX:
# Ensure that the parallel section of the fuselage is cylindrical
# if CylindricalMidSection is True
print "Enforcing circularity in the central section..."
if FirstTime:
PseudoRadius = PseudoDiameter/2
FirstTime = False
Pc = rs.PointCoordinates(IPointCentre)
P1 = P2 = P3 = Pc
P1 = rs.PointAdd(P1,(0,PseudoRadius,0))
P2 = rs.PointAdd(P2,(0,0,PseudoRadius))
P3 = rs.PointAdd(P3,(0,-PseudoRadius,0))
c = rs.AddCircle3Pt(P1, P2, P3)
else:
c = rs.AddInterpCurve([IPoint1,IPoint2,IPoint3,IPoint4,IPoint1],knotstyle=3)
# Once CSec is implemented in Rhino Python, this could be replaced
rs.DeleteObjects([IPoint1,IPoint2,IPoint3,IPoint4,IPointCentre])
list.append(C,c)
# Fit fuselage external surface
CurveNet = []
for c in C[1:]:
list.append(CurveNet,c)
list.append(CurveNet, FSVUCurve)
list.append(CurveNet, PortCurve)
list.append(CurveNet, FSVLCurve)
list.append(CurveNet, StarboardCurve)
FuselageOMLSurf = rs.AddNetworkSrf(CurveNet)
rs.DeleteObjects(C)
if not(FuselageOMLSurf==None):
print "Network surface fit succesful on attempt ", FittingAttempts+1
FittingAttempts = MaxFittingAttempts+1 # Force an exit from 'while'
# If all attempts at fitting a network surface failed, we attempt a Sweep2
if FuselageOMLSurf==None:
print "Failed to fit network surface to the external shape of the fuselage"
print "Attempting alternative fitting method, quality likely to be low..."
try:
FuselageOMLSurf = rs.AddSweep2([FSVUCurve,FSVLCurve],C[:])
except:
FuselageOMLSurf = False
SimplificationReqd = True # Enforce simplification
if not(FuselageOMLSurf):
print "Alternative fitting method failed too. Out of ideas."
if FuselageOMLSurf and SimplificationReqd:
rs.UnselectAllObjects()
rs.SelectObject(FuselageOMLSurf)
ToleranceStr = str(0.0005*EndX)
print "Smoothing..."
rs.Command("FitSrf " + ToleranceStr)
rs.UnselectAllObjects()
# Compute the stern point coordinates of the fuselage
Pu = rs.CurveEndPoint(FSVUCurve)
Pl = rs.CurveEndPoint(FSVLCurve)
SternPoint = [Pu.X, Pu.Y, 0.5*(Pu.Z+Pl.Z)]
rs.DeleteObjects([FSVUCurve,FSVLCurve,PortCurve,StarboardCurve,FSVMeanCurve])
return FuselageOMLSurf, SternPoint
def _BuildFuselageOML(NoseLengthRatio, TailLengthRatio, CylindricalMidSection,
SimplificationReqd):
MaxFittingAttempts = 6
FittingAttempts = -1
NetworkSrfSettings = [[35, 20, 15, 5, 20], [35, 30, 15, 5, 20],
[35, 20, 15, 2, 20], [30, 30, 15, 2, 20],
[30, 20, 15, 2, 20], [25, 20, 15, 2, 20],
[20, 20, 15, 2, 20], [15, 20, 15, 2, 20]]
StarboardCurve, PortCurve, FSVUCurve, FSVLCurve, FSVMeanCurve, NoseEndX, TailStartX, EndX = _FuselageLongitudinalGuideCurves(
NoseLengthRatio, TailLengthRatio)
while FittingAttempts <= MaxFittingAttempts:
FittingAttempts = FittingAttempts + 1
# Construct array of cross section definition frames
SX0 = 0
Step01 = NetworkSrfSettings[FittingAttempts][0]
SX1 = 0.04 * NoseEndX
Step12 = NetworkSrfSettings[FittingAttempts][1]
SX2 = SX1 + 0.25 * NoseEndX
Step23 = NetworkSrfSettings[FittingAttempts][2]
SX3 = NoseEndX
Step34 = NetworkSrfSettings[FittingAttempts][3]
SX4 = TailStartX
Step45 = NetworkSrfSettings[FittingAttempts][4]
SX5 = EndX
print "Attempting network surface fit with network density setup ", NetworkSrfSettings[
FittingAttempts][:]
Stations01 = act.pwfrange(SX0, SX1, max([Step01, 2]))
Stations12 = act.pwfrange(SX1, SX2, max([Step12, 2]))
Stations23 = act.pwfrange(SX2, SX3, max([Step23, 2]))
Stations34 = act.pwfrange(SX3, SX4, max([Step34, 2]))
Stations45 = act.pwfrange(SX4, SX5, max([Step45, 2]))
StationRange = Stations01[:
-1] + Stations12[:
-1] + Stations23[:
-1] + Stations34[:
-1] + Stations45
C = []
FirstTime = True
for XStation in StationRange:
P = rs.PlaneFromPoints((XStation, 0, 0), (XStation, 1, 0),
(XStation, 0, 1))
IP1 = rs.PlaneCurveIntersection(P, StarboardCurve)
IP2 = rs.PlaneCurveIntersection(P, FSVUCurve)
IP3 = rs.PlaneCurveIntersection(P, PortCurve)
IP4 = rs.PlaneCurveIntersection(P, FSVLCurve)
IPcentre = rs.PlaneCurveIntersection(P, FSVMeanCurve)
IPoint1 = rs.AddPoint(IP1[0][1])
IPoint2 = rs.AddPoint(IP2[0][1])
IPoint3 = rs.AddPoint(IP3[0][1])
IPoint4 = rs.AddPoint(IP4[0][1])
IPointCentre = rs.AddPoint(IPcentre[0][1])
PseudoDiameter = abs(IP4[0][1].Z - IP2[0][1].Z)
if CylindricalMidSection and NoseEndX < XStation < TailStartX:
# Ensure that the parallel section of the fuselage is cylindrical
# if CylindricalMidSection is True
print "Enforcing circularity in the central section..."
if FirstTime:
PseudoRadius = PseudoDiameter / 2
FirstTime = False
Pc = rs.PointCoordinates(IPointCentre)
P1 = P2 = P3 = Pc
P1 = rs.PointAdd(P1, (0, PseudoRadius, 0))
P2 = rs.PointAdd(P2, (0, 0, PseudoRadius))
P3 = rs.PointAdd(P3, (0, -PseudoRadius, 0))
c = rs.AddCircle3Pt(P1, P2, P3)
else:
c = rs.AddInterpCurve(
[IPoint1, IPoint2, IPoint3, IPoint4, IPoint1], knotstyle=3)
# Once CSec is implemented in Rhino Python, this could be replaced
rs.DeleteObjects(
[IPoint1, IPoint2, IPoint3, IPoint4, IPointCentre])
list.append(C, c)
# Fit fuselage external surface
CurveNet = []
for c in C[1:]:
list.append(CurveNet, c)
list.append(CurveNet, FSVUCurve)
list.append(CurveNet, PortCurve)
list.append(CurveNet, FSVLCurve)
list.append(CurveNet, StarboardCurve)
FuselageOMLSurf = rs.AddNetworkSrf(CurveNet)
rs.DeleteObjects(C)
if not (FuselageOMLSurf == None):
print "Network surface fit succesful on attempt ", FittingAttempts + 1
FittingAttempts = MaxFittingAttempts + 1 # Force an exit from 'while'
# If all attempts at fitting a network surface failed, we attempt a Sweep2
if FuselageOMLSurf == None:
print "Failed to fit network surface to the external shape of the fuselage"
print "Attempting alternative fitting method, quality likely to be low..."
try:
FuselageOMLSurf = rs.AddSweep2([FSVUCurve, FSVLCurve], C[:])
except:
FuselageOMLSurf = False
SimplificationReqd = True # Enforce simplification
if not (FuselageOMLSurf):
print "Alternative fitting method failed too. Out of ideas."
if FuselageOMLSurf and SimplificationReqd:
rs.UnselectAllObjects()
rs.SelectObject(FuselageOMLSurf)
ToleranceStr = str(0.0005 * EndX)
print "Smoothing..."
rs.Command("FitSrf " + ToleranceStr)
rs.UnselectAllObjects()
# Compute the stern point coordinates of the fuselage
Pu = rs.CurveEndPoint(FSVUCurve)
Pl = rs.CurveEndPoint(FSVLCurve)
SternPoint = [Pu.X, Pu.Y, 0.5 * (Pu.Z + Pl.Z)]
rs.DeleteObjects(
[FSVUCurve, FSVLCurve, PortCurve, StarboardCurve, FSVMeanCurve])
return FuselageOMLSurf, SternPoint
def transonic_airliner(
Propulsion=1, # 1 - twin, 2 - quad
EngineDia=2.9, # Diameter of engine intake highlight
FuselageScaling=[55.902, 55.902, 55.902], # [x,y,z] scale factors
NoseLengthRatio=0.182, # Proportion of forward tapering section of the fuselage
TailLengthRatio=0.293, # Proportion of aft tapering section of the fuselage
WingScaleFactor=44.56,
WingChordFactor=1.0,
Topology=1, # Topology = 2 will yield a box wing airliner - use with caution, this is just for demo purposes.
SpanStation1=0.31, # Inboard engine at this span station
SpanStation2=0.625, # Outboard engine at this span station (ignored if Propulsion=1)
EngineCtrBelowLE=0.3558, # Engine below leading edge, normalised by the length of the nacelle - range: [0.35,0.5]
EngineCtrFwdOfLE=0.9837, # Engine forward of leading edge, normalised by the length of the nacelle - range: [0.85,1.5]
Scarf_deg=3): # Engine scarf angle
# Build fuselage geometry
rs.EnableRedraw(False)
try:
FuselageOMLSurf, SternPoint = fuselage_oml.FuselageOML(
NoseLengthRatio,
TailLengthRatio,
Scaling=FuselageScaling,
NoseCoordinates=[0, 0, 0],
CylindricalMidSection=False,
SimplificationReqd=False)
except:
print "Fuselage fitting failed - stopping."
return
FuselageHeight = FuselageScaling[2] * 0.105
FuselageLength = FuselageScaling[0]
FuselageWidth = FuselageScaling[1] * 0.106
rs.Redraw()
if FuselageOMLSurf is None:
print "Failed to fit fuselage surface, stopping."
return
FSurf = rs.CopyObject(FuselageOMLSurf)
# Position of the apex of the wing
if FuselageHeight < 8.0:
WingApex = [0.1748 * FuselageLength, 0,
-0.0523 * FuselageHeight] #787:[9.77,0,-0.307]
else:
WingApex = [0.1748 * FuselageLength, 0,
-0.1 * FuselageHeight] #787:[9.77,0,-0.307]
# Set up the wing object, including the list of user-defined functions that
# describe the spanwise variations of sweep, dihedral, etc.
LooseSurf = 1
if Topology == 1:
SegmentNo = 10
Wing = liftingsurface.LiftingSurface(WingApex,
ta.mySweepAngleFunctionAirliner,
ta.myDihedralFunctionAirliner,
ta.myTwistFunctionAirliner,
ta.myChordFunctionAirliner,
ta.myAirfoilFunctionAirliner,
LooseSurf,
SegmentNo,
TipRequired=True)
elif Topology == 2:
SegmentNo = 101
Wing = liftingsurface.LiftingSurface(WingApex,
ta.mySweepAngleFunctionAirliner,
bw.myDihedralFunctionBoxWing,
ta.myTwistFunctionAirliner,
ta.myChordFunctionAirliner,
ta.myAirfoilFunctionAirliner,
LooseSurf,
SegmentNo,
TipRequired=True)
# Instantiate the wing object and add it to the document
rs.EnableRedraw(False)
WingSurf, ActualSemiSpan, LSP_area, RootChord, AR, WingTip = Wing.GenerateLiftingSurface(
WingChordFactor, WingScaleFactor)
rs.Redraw()
if Topology == 1:
# Add wing to body fairing
WTBFXCentre = WingApex[
0] + RootChord / 2.0 + RootChord * 0.1297 # 787: 23.8
if FuselageHeight < 8.0:
WTBFZ = RootChord * 0.009 #787: 0.2
WTBFheight = 0.1212 * RootChord #787:2.7
WTBFwidth = 1.08 * FuselageWidth
else:
WTBFZ = WingApex[2] + 0.005 * RootChord
WTBFheight = 0.09 * RootChord
WTBFwidth = 1.15 * FuselageWidth
WTBFlength = 1.167 * RootChord #787:26
WTBFXStern = WTBFXCentre + WTBFlength / 2.0
CommS = "_Ellipsoid %3.2f,0,%3.2f %3.2f,0,%3.2f %3.2f,%3.2f,%3.2f %3.2f,0,%3.2f " % (
WTBFXCentre, WTBFZ, WTBFXStern, WTBFZ, 0.5 *
(WTBFXCentre + WTBFXStern), 0.5 * WTBFwidth, WTBFZ, 0.5 *
(WTBFXCentre + WTBFXStern), WTBFheight)
rs.EnableRedraw(False)
rs.CurrentView("Perspective")
rs.Command(CommS)
LO = rs.LastCreatedObjects()
WTBF = LO[0]
rs.Redraw()
# Trim wing inboard section
CutCirc = rs.AddCircle3Pt((0, WTBFwidth / 4, -45),
(0, WTBFwidth / 4, 45),
(90, WTBFwidth / 4, 0))
CutCircDisk = rs.AddPlanarSrf(CutCirc)
CutDisk = CutCircDisk[0]
rs.ReverseSurface(CutDisk, 1)
rs.TrimBrep(WingSurf, CutDisk)
elif Topology == 2:
# Overlapping wing tips
CutCirc = rs.AddCircle3Pt((0, 0, -45), (0, 0, 45), (90, 0, 0))
CutCircDisk = rs.AddPlanarSrf(CutCirc)
CutDisk = CutCircDisk[0]
rs.ReverseSurface(CutDisk, 1)
rs.TrimBrep(WingSurf, CutDisk)
# Engine installation (nacelle and pylon)
if Propulsion == 1:
# Twin, wing mounted
SpanStation = SpanStation1
NacelleLength = 1.95 * EngineDia
rs.EnableRedraw(False)
EngineSection, Chord = act.CutSect(WingSurf, SpanStation)
CEP = rs.CurveEndPoint(Chord)
EngineStbd, PylonStbd = engine.TurbofanNacelle(
EngineSection,
Chord,
CentreLocation=[
CEP.X - EngineCtrFwdOfLE * NacelleLength, CEP.Y,
CEP.Z - EngineCtrBelowLE * NacelleLength
],
ScarfAngle=Scarf_deg,
HighlightRadius=EngineDia / 2.0,
MeanNacelleLength=NacelleLength)
rs.Redraw()
elif Propulsion == 2:
# Quad, wing-mounted
NacelleLength = 1.95 * EngineDia
rs.EnableRedraw(False)
EngineSection, Chord = act.CutSect(WingSurf, SpanStation1)
CEP = rs.CurveEndPoint(Chord)
EngineStbd1, PylonStbd1 = engine.TurbofanNacelle(
EngineSection,
Chord,
CentreLocation=[
CEP.X - EngineCtrFwdOfLE * NacelleLength, CEP.Y,
CEP.Z - EngineCtrBelowLE * NacelleLength
],
ScarfAngle=Scarf_deg,
HighlightRadius=EngineDia / 2.0,
MeanNacelleLength=NacelleLength)
rs.DeleteObjects([EngineSection, Chord])
EngineSection, Chord = act.CutSect(WingSurf, SpanStation2)
CEP = rs.CurveEndPoint(Chord)
EngineStbd2, PylonStbd2 = engine.TurbofanNacelle(
EngineSection,
Chord,
CentreLocation=[
CEP.X - EngineCtrFwdOfLE * NacelleLength, CEP.Y,
CEP.Z - EngineCtrBelowLE * NacelleLength
],
ScarfAngle=Scarf_deg,
HighlightRadius=EngineDia / 2.0,
MeanNacelleLength=NacelleLength)
rs.Redraw()
# Script for generating and positioning the fin
rs.EnableRedraw(False)
# Position of the apex of the fin
P = [0.6524 * FuselageLength, 0.003, FuselageHeight * 0.384]
#P = [36.47,0.003,2.254]55.902
RotVec = rs.VectorCreate([1, 0, 0], [0, 0, 0])
LooseSurf = 1
SegmentNo = 200
Fin = liftingsurface.LiftingSurface(P, tail.mySweepAngleFunctionFin,
tail.myDihedralFunctionFin,
tail.myTwistFunctionFin,
tail.myChordFunctionFin,
tail.myAirfoilFunctionFin, LooseSurf,
SegmentNo)
ChordFactor = 1.01 #787:1.01
if Topology == 1:
ScaleFactor = WingScaleFactor / 2.032 #787:21.93
elif Topology == 2:
ScaleFactor = WingScaleFactor / 3.5
FinSurf, FinActualSemiSpan, FinArea, FinRootChord, FinAR, FinTip = Fin.GenerateLiftingSurface(
ChordFactor, ScaleFactor)
FinSurf = rs.RotateObject(FinSurf, P, 90, axis=RotVec)
FinTip = rs.RotateObject(FinTip, P, 90, axis=RotVec)
if Topology == 1:
# Tailplane
P = [0.7692 * FuselageLength, 0.000, FuselageHeight * 0.29]
RotVec = rs.VectorCreate([1, 0, 0], [0, 0, 0])
LooseSurf = 1
SegmentNo = 100
TP = liftingsurface.LiftingSurface(P, tail.mySweepAngleFunctionTP,
tail.myDihedralFunctionTP,
tail.myTwistFunctionTP,
tail.myChordFunctionTP,
tail.myAirfoilFunctionTP, LooseSurf,
SegmentNo)
ChordFactor = 1.01
ScaleFactor = 0.388 * WingScaleFactor #787:17.3
TPSurf, TPActualSemiSpan, TPArea, TPRootChord, TPAR, TPTip = TP.GenerateLiftingSurface(
ChordFactor, ScaleFactor)
rs.EnableRedraw(True)
rs.DeleteObjects([EngineSection, Chord])
try:
rs.DeleteObjects([CutCirc])
except:
pass
try:
rs.DeleteObjects([CutCircDisk])
except:
pass
# Windows
# Cockpit windows:
rs.EnableRedraw(False)
CockpitWindowTop = 0.305 * FuselageHeight
CWC1s, CWC2s, CWC3s, CWC4s = fuselage_oml.CockpitWindowContours(
Height=CockpitWindowTop, Depth=6)
FuselageOMLSurf, Win1 = rs.SplitBrep(FuselageOMLSurf,
CWC1s,
delete_input=True)
FuselageOMLSurf, Win2 = rs.SplitBrep(FuselageOMLSurf,
CWC2s,
delete_input=True)
FuselageOMLSurf, Win3 = rs.SplitBrep(FuselageOMLSurf,
CWC3s,
delete_input=True)
FuselageOMLSurf, Win4 = rs.SplitBrep(FuselageOMLSurf,
CWC4s,
delete_input=True)
rs.DeleteObjects([CWC1s, CWC2s, CWC3s, CWC4s])
(Xmin, Ymin, Zmin, Xmax, Ymax,
Zmax) = act.ObjectsExtents([Win1, Win2, Win3, Win4])
CockpitBulkheadX = Xmax
CockpitWallPlane = rs.PlaneFromPoints([CockpitBulkheadX, -15, -15],
[CockpitBulkheadX, 15, -15],
[CockpitBulkheadX, -15, 15])
CockpitWall = rs.AddPlaneSurface(CockpitWallPlane, 30, 30)
if 'WTBF' in locals():
rs.TrimBrep(WTBF, CockpitWall)
rs.DeleteObject(CockpitWall)
# Window lines
WIN = [1]
NOWIN = [0]
# A typical window pattern (including emergency exit windows)
WinVec = WIN + 2 * NOWIN + 9 * WIN + 3 * NOWIN + WIN + NOWIN + 24 * WIN + 2 * NOWIN + WIN + NOWIN + 14 * WIN + 2 * NOWIN + WIN + 20 * WIN + 2 * NOWIN + WIN + NOWIN + 20 * WIN
if FuselageHeight < 8.0:
# Single deck
WindowLineHeight = 0.3555 * FuselageHeight
WinX = 0.1157 * FuselageLength
WindowPitch = 0.609
WinInd = -1
while WinX < 0.75 * FuselageLength:
WinInd = WinInd + 1
if WinVec[WinInd] == 1 and WinX > CockpitBulkheadX:
WinStbd, WinPort, FuselageOMLSurf = fuselage_oml.MakeWindow(
FuselageOMLSurf, WinX, WindowLineHeight)
act.AssignMaterial(WinStbd, "Plexiglass")
act.AssignMaterial(WinPort, "Plexiglass")
WinX = WinX + WindowPitch
else:
# Fuselage big enough to accommodate two decks
# Lower deck
WindowLineHeight = 0.17 * FuselageHeight #0.166
WinX = 0.1 * FuselageLength #0.112
WindowPitch = 0.609
WinInd = 0
while WinX < 0.757 * FuselageLength:
WinInd = WinInd + 1
if WinVec[WinInd] == 1 and WinX > CockpitBulkheadX:
WinStbd, WinPort, FuselageOMLSurf = fuselage_oml.MakeWindow(
FuselageOMLSurf, WinX, WindowLineHeight)
act.AssignMaterial(WinStbd, "Plexiglass")
act.AssignMaterial(WinPort, "Plexiglass")
WinX = WinX + WindowPitch
# Upper deck
WindowLineHeight = 0.49 * FuselageHeight
WinX = 0.174 * FuselageLength #0.184
WinInd = 0
while WinX < 0.757 * FuselageLength:
WinInd = WinInd + 1
if WinVec[WinInd] == 1 and WinX > CockpitBulkheadX:
WinStbd, WinPort, FuselageOMLSurf = fuselage_oml.MakeWindow(
FuselageOMLSurf, WinX, WindowLineHeight)
act.AssignMaterial(WinStbd, "Plexiglass")
act.AssignMaterial(WinPort, "Plexiglass")
WinX = WinX + WindowPitch
rs.Redraw()
act.AssignMaterial(FuselageOMLSurf, "White_composite_external")
act.AssignMaterial(WingSurf, "White_composite_external")
try:
act.AssignMaterial(TPSurf, "ShinyBARedMetal")
except:
pass
act.AssignMaterial(FinSurf, "ShinyBARedMetal")
act.AssignMaterial(Win1, "Plexiglass")
act.AssignMaterial(Win2, "Plexiglass")
act.AssignMaterial(Win3, "Plexiglass")
act.AssignMaterial(Win4, "Plexiglass")
# Mirror the geometry as required
act.MirrorObjectXZ(WingSurf)
act.MirrorObjectXZ(WingTip)
try:
act.MirrorObjectXZ(TPSurf)
act.MirrorObjectXZ(TPTip)
except:
pass
if Propulsion == 1:
for ObjId in EngineStbd:
act.MirrorObjectXZ(ObjId)
act.MirrorObjectXZ(PylonStbd)
elif Propulsion == 2:
for ObjId in EngineStbd1:
act.MirrorObjectXZ(ObjId)
act.MirrorObjectXZ(PylonStbd1)
for ObjId in EngineStbd2:
act.MirrorObjectXZ(ObjId)
act.MirrorObjectXZ(PylonStbd2)
rs.DeleteObject(FSurf)
rs.Redraw()
def _BuildLS(self, ChordFactor, ScaleFactor):
# Generates a tentative lifting surface, given the general, nondimensio-
# nal parameters of the object (variations of chord length, dihedral, etc.)
# and the two scaling factors.
LEPoints = self._GenerateLeadingEdge()
Sections = []
ProjectedSections = []
TEPoints_u = []
TEPoints_l = []
for i, LEP in enumerate(LEPoints):
Eps = float(i)/self.SegmentNo
Airfoil, Chrd = self.AirfoilFunct(Eps, LEP, self.ChordFunct, ChordFactor, self.DihedralFunct, self.TwistFunct)
list.append(Sections, Airfoil)
Pr = rs.ProjectCurveToSurface(Chrd,self.XoY_Plane,self.ProjVectorZ)
list.append(ProjectedSections, Pr)
list.append(TEPoints_l, rs.CurveEndPoint(Airfoil))
list.append(TEPoints_u, rs.CurveStartPoint(Airfoil))
rs.DeleteObjects(Chrd)
LS = rs.AddLoftSrf(Sections,loft_type=self.LooseSurf)
if LS==None:
# Failed to fit loft surface. Try another fitting algorithm
TECurve_u = rs.AddInterpCurve(TEPoints_u)
TECurve_l = rs.AddInterpCurve(TEPoints_l)
rails = []
list.append(rails, TECurve_u)
list.append(rails, TECurve_l)
# Are the first and last curves identical?
# AddSweep fails if they are, so if that is the case, one is skipped
CDev = rs.CurveDeviation(Sections[0],Sections[-1])
if CDev==None:
shapes = Sections
LS = rs.AddSweep2(rails, shapes, False)
else:
shapes = Sections[:-1]
LS = rs.AddSweep2(rails, shapes, True)
rs.DeleteObjects(rails)
rs.DeleteObjects([TECurve_u, TECurve_l])
WingTip = None
if self.TipRequired:
TipCurve = Sections[-1]
TipCurve = act.AddTEtoOpenAirfoil(TipCurve)
WingTip = rs.AddPlanarSrf(TipCurve)
rs.DeleteObject(TipCurve)
# Calculate projected area
# In some cases the projected sections cannot all be lofted in one go
# (it happens when parts of the wing fold back onto themselves), so
# we loft them section by section and we compute the area as a sum.
LSP_area = 0
# Attempt to compute a projected area
try:
for i, LEP in enumerate(ProjectedSections):
if i < len(ProjectedSections)-1:
LSPsegment = rs.AddLoftSrf(ProjectedSections[i:i+2])
SA = rs.SurfaceArea(LSPsegment)
rs.DeleteObject(LSPsegment)
LSP_area = LSP_area + SA[0]
except:
print "Failed to compute projected area. Using half of surface area instead."
LS_area = rs.SurfaceArea(LS)
LSP_area = 0.5*LS_area[0]
BB = rs.BoundingBox(LS)
if BB:
ActualSemiSpan = BB[2].Y - BB[0].Y
else:
ActualSemiSpan = 0.0
# Garbage collection
rs.DeleteObjects(Sections)
try:
rs.DeleteObjects(ProjectedSections)
except:
print "Cleanup: no projected sections to delete"
rs.DeleteObjects(LEPoints)
# Scaling
Origin = rs.AddPoint([0,0,0])
ScaleXYZ = (ScaleFactor, ScaleFactor, ScaleFactor)
LS = rs.ScaleObject(LS, Origin, ScaleXYZ)
if self.TipRequired and WingTip:
WingTip = rs.ScaleObject(WingTip, Origin, ScaleXYZ)
rs.DeleteObject(Origin)
ActualSemiSpan = ActualSemiSpan*ScaleFactor
LSP_area = LSP_area*ScaleFactor**2.0
RootChord = (self.ChordFunct(0)*ChordFactor)*ScaleFactor
AR = ((2.0*ActualSemiSpan)**2.0)/(2*LSP_area)
return LS, ActualSemiSpan, LSP_area, RootChord, AR, WingTip