#print(mdl.sections['shell'])
mdl.add(
ElementProperties(name='ep',
material='concrete',
section='shell',
elset='mesh'))
#print(mdl.element_properties['ep'])
mdl.add(PinnedDisplacement(name='pinned', nodes='supports'))
#print(mdl.displacements['pinned'])
mdl.add([
GravityLoad(name='gravity', elements='mesh'),
PointLoad(name='loads', nodes='loads', z=-1000),
AreaLoad(name='pressure', elements='area', z=7000),
])
#print(mdl.loads['loads'])
#print(mdl.loads['gravity'])
#print(mdl.loads['pressure'])
mdl.add([
GeneralStep(name='bc', displacements='pinned'),
GeneralStep(name='loads',
loads=['gravity', 'loads', 'pressure'],
factor=1.5),
BucklingStep(name='buckling',
modes=3,
p = 2400
thickness = .02
matname = 'concrete'
concrete = ElasticIsotropic(name=matname, E=E, v=v, p=p)
s.add_material(concrete)
section = ShellSection(name='concrete_sec', t=thickness)
s.add_section(section)
prop = ElementProperties(name='floor',
material=matname,
section='concrete_sec',
elsets=['shell'])
s.add_element_properties(prop)
# add gravity load -------------------------------------------------------------
s.add_load(GravityLoad(name='load_gravity', elements=['shell']))
# add steps --------------------------------------------------------------------
step = GeneralStep(name='gravity_step',
nlgeom=False,
displacements=['supports'],
loads=['load_gravity'],
type='static')
s.add_steps([step])
s.steps_order = ['gravity_step']
# analyse ----------------------------------------------------------------------
section='sec_tie',
elset='elset_ties'),
Properties(name='ep_concrete',
material='mat_concrete',
section='sec_solid',
elset='elset_tets'),
])
# Displacements
mdl.add(RollerDisplacementY(name='disp_rollers', nodes='nset_supports'))
# Loads
mdl.add([
GravityLoad(name='load_gravity', elements='elset_tets'),
PointLoad(name='load_point', nodes='nset_load', z=-5),
])
# Steps
mdl.add([
GeneralStep(name='step_bc', displacements=['disp_rollers']),
GeneralStep(name='step_loads',
loads=['load_gravity', 'load_point'],
factor=1.35),
])
mdl.steps_order = ['step_bc', 'step_loads']
# Summary
Properties(name='ep_ends',
material='mat_steel',
section='sec_ends',
elset='elset_ends'),
])
# Displacements
mdl.add([
RollerDisplacementY(name='disp_top', nodes='nset_top'),
RollerDisplacementY(name='disp_bot', nodes='nset_bot'),
])
# Loads
mdl.add(GravityLoad(name='load_gravity', elements='elset_mesh'))
mesh = mesh_from_guid(Mesh(), rs.ObjectsByLayer('elset_mesh')[0])
point_loads = {}
for key in mesh.vertices():
xyz = mesh.vertex_coordinates(key)
pt = rs.ProjectPointToSurface([xyz],
rs.ObjectsByLayer('surface')[0],
[0, 0, 1])[0]
pz = mesh.vertex_area(key) * distance_point_point(xyz, pt) * 2400 * 9.81
point_loads[mdl.check_node_exists(xyz)] = {'z': -pz}
mdl.add(PointLoads(name='load_points', components=point_loads))
# Steps
displacements = ['disp_top', 'disp_bot']
'w_l2': {'pos': -0.045, 'spacing': 0.100, 'material': 'mat_rebar', 'dia': 0.010, 'angle': 90},
'w_l1': {'pos': -0.055, 'spacing': 0.100, 'material': 'mat_rebar', 'dia': 0.010, 'angle': 0}}
mdl.add_element_properties([
Properties(name='ep_plinth', material='mat_concrete', section='sec_plinth',
elsets='elset_plinth', reinforcement=reb_plinth),
Properties(name='ep_wall', material='mat_concrete', section='sec_wall',
elsets='elset_wall', reinforcement=reb_wall)])
# Displacements
mdl.add_displacement(FixedDisplacement(name='disp_fixed', nodes='nset_fixed'))
# Loads
mdl.add_load(GravityLoad(name='load_gravity', elements=['elset_wall', 'elset_plinth']))
components = {}
for guid in rs.ObjectsByLayer('nset_loads'):
px, py, pz = rs.ObjectName(guid).split(' ')
components[mdl.check_node_exists(rs.PointCoordinates(guid))] = {'z': float(pz)*100}
mdl.add_load(PointLoads(name='load_points', components=components))
loads = ['load_gravity', 'load_points']
# Steps
mdl.add_steps([
GeneralStep(name='step_bc', nlgeom=False, displacements=['disp_fixed']),
GeneralStep(name='step_loads', nlgeom=False, loads=loads)])
mdl.steps_order = ['step_bc', 'step_loads']
# Summary
# Properties
mdl.add(
Properties(name='ep_shell',
material='mat_elastic',
section='sec_shell',
elset='mesh'))
# Displacements
mdl.add(PinnedDisplacement(name='disp_pin', nodes='supports'))
# Loads
mdl.add(GravityLoad(name='gravity', elements='all'))
mdl.add(PointLoad(name='load_points', nodes='lpts1', x=0, y=0, z=-1000))
# Steps
mdl.add([
GeneralStep(name='step_bc', displacements=['disp_pin']),
GeneralStep(name='step_load', loads=['gravity', 'load_points']),
])
mdl.steps_order = ['step_bc', 'step_load']
# Summary
mdl.summary()
# Run
mdl.add([
Properties(name='ep_circ',
material='mat_elastic',
section='sec_circ',
elset='elset_beams'),
Properties(name='ep_shell',
material='mat_elastic',
section='sec_shell',
elset='elset_shell'),
])
# Add loads
mdl.add([
PointLoad(name='load_point', nodes='nset_top', x=10000, z=-10000),
GravityLoad(name='load_gravity', elements='elset_beams'),
])
# print('load_point components: ', mdl.loads['load_point'].components)
# Add displacements
mdl.add(PinnedDisplacement(name='disp_pinned', nodes='nset_base'))
# print('disp_pinned components: ', mdl.displacements['disp_pinned'].components)
# Add steps
mdl.add([
GeneralStep(name='step_bc', displacements=['disp_pinned']),
GeneralStep(name='step_loads', loads=['load_point', 'load_gravity']),
mdl.add_element_properties([
Properties(name='ep_concrete', material='mat_concrete', section='sec_concrete', elsets='elset_concrete'),
Properties(name='ep_steel', material='mat_steel', section='sec_ties', elsets='elset_ties')])
# Displacements
mdl.add_displacements([
RollerDisplacementXY(name='disp_roller', nodes='nset_corners'),
PinnedDisplacement(name='disp_pinned', nodes='nset_corner1'),
GeneralDisplacement(name='disp_xdof', nodes='nset_corner2', x=0)])
# Loads
mesh = mesh_from_guid(Mesh(), rs.ObjectsByLayer('load_mesh')[0])
mdl.add_loads([
GravityLoad(name='load_gravity', elements='elset_concrete'),
PrestressLoad(name='load_prestress', elements='elset_ties', sxx=50*10**6),
TributaryLoad(mdl, name='load_tributary', mesh=mesh, z=-2000)])
# Steps
mdl.add_steps([
GeneralStep(name='step_bc', displacements=['disp_roller', 'disp_pinned', 'disp_xdof']),
GeneralStep(name='step_prestress', loads=['load_prestress']),
GeneralStep(name='step_loads', loads=['load_gravity', 'load_tributary'], factor=1.1)])
mdl.steps_order = ['step_bc', 'step_prestress', 'step_loads']
# Summary
mdl.summary()
Properties(name='ep_joints',
material='mat_bamboo',
section='sec_joints',
elsets=s3)
])
# Displacements
mdl.add_displacements([
PinnedDisplacement(name='disp_bot', nodes='supports_bot'),
RollerDisplacementZ(name='disp_top', nodes='supports_top')
])
# Loads
mdl.add_load(GravityLoad(name='load_gravity', elements=layers))
# Steps
mdl.add_steps([
GeneralStep(name='step_bc', displacements=['disp_bot', 'disp_top']),
GeneralStep(name='step_loads', loads=['load_gravity'])
])
mdl.steps_order = ['step_bc', 'step_loads']
# Summary
mdl.summary()
# Run (Abaqus)
section='sec_ties',
elset='elset_ties'),
])
# Displacements
mdl.add([
RollerDisplacementXY(name='disp_edges', nodes='nset_edges'),
PinnedDisplacement(name='disp_pinned', nodes='nset_corner1'),
GeneralDisplacement(name='disp_xdof', nodes='nset_corner2', x=0),
])
# Loads
mdl.add([
GravityLoad(name='load_gravity', elements='elset_floor'),
PrestressLoad(name='load_prestress', elements='elset_ties',
sxx=10 * 10**6),
TributaryLoad(mdl,
name='load_area',
mesh=mesh_from_bmesh(get_object_by_name('load_mesh')),
z=-2000),
])
# Steps
mdl.add([
GeneralStep(name='step_bc',
displacements=['disp_edges', 'disp_pinned', 'disp_xdof']),
GeneralStep(name='step_loads',
loads=['load_gravity', 'load_area'],
def compute_compas_fea(file_path, load_path, fea_engine='abaqus', recompute=True):
""" Use abaqus (via compas_fea) to perform elastic FEA on the given frame
under a given load case. If no load path is specified, elemental gravity
will be assumbed to be applied.
Parameters
----------
file_path : string
full path to the frame shape's json file.
load_path : type
full path to the load case's json file.
Returns
-------
nD: dict
Reactional nodal displacement
key is the node id.
value is
(nodal_id, dx, dy, dz, theta_x, theta_y, theta_z).
fR: dict
Fixities reaction force, moment.
key is the nodal id.
value is [Fxyz, Mxyz] in the global axes.
eR: dict
Element-wise reaction force, moment (two ends).
key is the element id.
(Fxyz_1, Mxyz_1, Fxyz_2, Mxyz_2)
"""
root_dir = os.path.dirname(os.path.abspath(__file__))
temp_dir = os.path.join(root_dir, 'compas_fea-temp')
if not os.path.exists(temp_dir):
os.makedirs(temp_dir)
file_json_name = file_path.split(os.sep)[-1]
file_name = file_json_name.split('.')[0]
print('compas_fea initing: file name {}'.format(file_name))
if not recompute:
nD, fR, eR = parse_abaqus_result_json(file_name, temp_dir)
return nD, fR, eR
with open(file_path, 'r') as f:
json_data = json.loads(f.read())
load_json_data = {}
if load_path:
with open(load_path, 'r') as f:
load_json_data = json.loads(f.read())
# init an empty structure
mdl = Structure(name=file_name, path=os.path.join(temp_dir, ''))
# nodes
mdl.add_nodes(nodes=parse_frame_nodes(json_data))
# elements
elements = parse_elements(json_data)
# align local axes with conmech
sc = stiffness_checker(json_file_path=file_path, verbose=False)
e_rot_mats = sc.get_element_local2global_rot_matrices()
assert len(e_rot_mats) == len(elements)
for e, mat in zip(elements, e_rot_mats):
# compas_fea local axis convention is differrent to the one used in conmech:
# in compas_fea
# 'ex' axis represents the cross-section’s major axis
# 'ey' is the cross-section’s minor axis
# 'ez' is the axis along the element
# TODO: this numpy array to list conversion
# is essential to make compas_fea work...
ez = list(mat[0][0:3]) # conmech longitude axis
ex = list(mat[1][0:3]) # conmech cross sec major axis
ey = list(mat[2][0:3]) # conmech cross sec minor axis
mdl.add_element(nodes=e,
type='BeamElement',
axes={'ex': ex, 'ey': ey, 'ez': ez})
# print(mdl.elements[mdl.check_element_exists(nodes=e)])
assert_equal(mdl.element_count(), len(elements))
# Sets
# just convenient aliases for referring to a group of elements
mdl.add_set(name='elset_all', type='element', selection=list(range(mdl.element_count())))
mdl.add_set(name='nset_all', type='node', selection=list(range(mdl.node_count())))
fixities = parse_fixties(json_data)
mdl.add_set(name='nset_fix', type='node', selection=[f[0] for f in fixities])
if load_json_data:
pt_loads, include_sw = parse_load_case(load_json_data)
# mdl.add_set(name='nset_pt_load', type='node', selection=[l[0] for l in pt_loads])
else:
pt_loads = []
include_sw = True
if pt_loads:
mdl.add_set(name='nset_v_load_all', type='node', selection=[pl[0] for pl in pt_loads])
# Materials
# Young’s modulus E [in units of Pa]
# Poisson’s ratio v and density p [kg per cubic metre].
mat_json = json_data['material_properties']
mat_name = 'mat_' + mat_json['material_name']
E_scale = parse_pressure_scale_conversion(mat_json['youngs_modulus_unit'])
p_scale = parse_density_scale_conversion(mat_json['density_unit'])
mdl.add(ElasticIsotropic(name=mat_name,
E=E_scale * mat_json['youngs_modulus'],
v=mat_json['poisson_ratio'],
p=p_scale * mat_json['density']))
# G_scale = parse_pressure_scale_conversion(mat_json['shear_modulus_unit'])
# print('{}, {}'.format(mdl.materials['mat_' + mat_json['material_name']].G, G_scale * mat_json['shear_modulus']))
# assert_almost_equal(mdl.materials['mat_' + mat_json['material_name']].G['G'], G_scale * mat_json['shear_modulus'])
# print('-----------material')
# print(mdl.materials[mat_name])
# Sections
# SI units should be used, this includes the use of metres m for cross-section dimensions, not millimetres mm.
sec_name = 'sec_circ'
mdl.add(CircularSection(name=sec_name, r=parse_circular_cross_sec_radius(json_data)))
# print('-----------cross section')
# print(mdl.sections[sec_name])
# Properties, associate material & cross sec w/ element sets
mdl.add(Properties(name='ep_all', material=mat_name, section=sec_name, elset='elset_all'))
# Displacements
# pin supports
for i, fix in enumerate(fixities):
f_dof = []
for j in range(6):
if fix[j+1] == 1:
f_dof.append(0)
else:
f_dof.append(None)
mdl.add(GeneralDisplacement(name='disp_fix_'+str(i), nodes=[fix[0]], x=f_dof[0], y=f_dof[1], z=f_dof[2], xx=f_dof[3], yy=f_dof[4], zz=f_dof[5]))
# print('-----------fixities')
# for i in range(len(fixities)):
# print(mdl.displacements['disp_fix_'+str(i)])
# Loads
if pt_loads:
mdl.add([PointLoad(name='load_v_'+str(i), nodes=[pl[0]],
x=pl[1], y=pl[2], z=pl[3],
xx=pl[4], yy=pl[5], zz=pl[6])
for i, pl in enumerate(pt_loads)])
if include_sw:
mdl.add(GravityLoad(name='load_gravity', elements='elset_all'))
else:
mdl.add(GravityLoad(name='load_gravity', elements='elset_all'))
# print('-----------loads')
# print(mdl.loads['load_gravity'])
# for i in range(len(pt_loads)):
# print(mdl.loads['load_v_'+str(i)])
# Steps
loads_names = []
if pt_loads:
loads_names.extend(['load_v_'+str(i) for i in range(len(pt_loads))])
if include_sw:
loads_names.append('load_gravity')
mdl.add([
GeneralStep(name='step_bc', displacements=['disp_fix_'+str(i) for i in range(len(fixities))]),
GeneralStep(name='step_loads', loads=loads_names)
])
# a boundary condition step such as 'step_bc' above, should always be applied as the first step to prevent rigid body motion
mdl.steps_order = ['step_bc', 'step_loads']
# Summary
mdl.summary()
# Run
# node
# 'u': nodal displacement: ux, uy, uz, um (magnitude)
# 'ur': nodal rotation
# 'rf': reaction force
# 'cf': concentrated force (external load)
# 'cm': concentrated moment (external load)
# element
# 's': beam stress (conmech cannot compute this at
# version 0.1.1)
# For beam, the following values are evaluated
# at the "integration point" 'ip1' (middle point)
# and pts along the axis: 'sp3, sp7, sp11, sp15'
# sxx: axial
# syy: hoop
# sxy: torsion
# smises: Von Mises
# smaxp: max principal
# sminp: min principal
# 'sf': beam section force
# sf1: axial
# sf2: shear x
# sf3: shear y
if fea_engine == 'abaqus':
mdl.analyse_and_extract(software='abaqus', fields=['u', 'ur', 'rf', 'rm', 'sf'], ndof=6, output=True)
nD, fR, eR = parse_abaqus_result_json(file_name, temp_dir)
elif fea_engine == 'opensees':
mdl.analyse_and_extract(software='opensees', fields=['u'], exe=OPENSEES_PATH, ndof=6, output=True, save=True)
raise NotImplementedError('opensees from compas_fea is not fully supported at this moment...')
nD = {}
fR = {}
eR = {}
# nD = mdl.get_nodal_results(step='step_load', field='ux', nodes='nset_all')
print(mdl.results)
else:
raise NotImplementedError('FEA engine not supported!')
return nD, fR, eR
Properties(name='ep_stiff', material='mat_stiff', section='sec_stiff', elset='elset_stiff'),
Properties(name='ep_ties', material='mat_steel', section='sec_ties', elset='elset_ties'),
])
# Displacements
mdl.add([
RollerDisplacementXY(name='disp_edges', nodes='nset_edges'),
PinnedDisplacement(name='disp_pinned', nodes='nset_corner1'),
GeneralDisplacement(name='disp_xdof', nodes='nset_corner2', x=0),
])
# Loads
mdl.add([
GravityLoad(name='load_gravity', elements=['elset_ribs', 'elset_vault']),
PrestressLoad(name='load_prestress', elements='elset_ties', sxx=10*10**6),
TributaryLoad(mdl, name='load_area', mesh=mesh_from_guid(Mesh(), rs.ObjectsByLayer('load_mesh')[0]), z=-2000),
])
# Steps
mdl.add([
GeneralStep(name='step_bc', displacements=['disp_edges', 'disp_pinned', 'disp_xdof']),
GeneralStep(name='step_loads', loads=['load_gravity', 'load_area'], factor={'load_gravity': 1.35, 'load_area': 1.50}),
])
mdl.steps_order = ['step_bc', 'step_loads']
# Summary
mdl.summary()
mdl.add(
Properties(name='ep_beam',
material='mat_elastic',
section='sec_beam',
elset='elset_lines'))
# Displacements
mdl.add([
PinnedDisplacement(name='disp_left', nodes='nset_left'),
PinnedDisplacement(name='disp_right', nodes='nset_right'),
])
# Loads
mdl.add(GravityLoad(name='load_gravity', elements='elset_lines'))
# Steps
mdl.add([
GeneralStep(name='step_bc', displacements=['disp_left', 'disp_right']),
GeneralStep(name='step_load', loads='load_gravity'),
])
mdl.steps_order = ['step_bc', 'step_load']
# Summary
mdl.summary()
# Run
# Sections
mdl.add(RectangularSection(name='bsec', b=0.1, h=.2))
mdl.add(Properties(name='ep_1', material='mat_1', section='bsec', elsets=['beams']))
mdl.add(ShellSection(name='ssec', t=.1))
mdl.add(Properties(name='ep_2', material='mat_2', section='ssec', elsets=['shell']))
# Displacements
mdl.add([FixedDisplacement(name='supports', nodes='supports')])
# Loads
mdl.add(GravityLoad(name='load_gravity', elements=['beams', 'shell']))
# Steps
mdl.add([
GeneralStep(name='step_bc', displacements=['supports']),
GeneralStep(name='step_load', loads=['load_gravity']),
])
mdl.steps_order = ['step_bc', 'step_load']
# Summary
mdl.analyse_and_extract(software='ansys', fields=['s'])
# rhino.plot_data(mdl, step='step_load', field='um', radius=0.1, colorbar_size=0.3)
material='mat_steel',
section='sec_stays',
elsets='elset_stays')
])
# Displacements
mdl.add_displacement(PinnedDisplacement(name='disp_pinned', nodes='nset_pins'))
# Loads
# Note: GravityLoad doesnt activate for OpenSees
mdl.add_loads([
PointLoad(name='load_pl_v', nodes='nset_load_v', z=-15500),
PointLoad(name='load_pl_h', nodes='nset_load_h', x=5000),
GravityLoad(name='load_gravity', elements=['elset_diag', 'elset_main'])
])
# Steps
mdl.add_steps([
GeneralStep(name='step_bc', displacements=['disp_pinned']),
GeneralStep(name='step_loads',
loads=['load_pl_v', 'load_pl_h', 'load_gravity'],
factor=1.5,
increments=200)
])
mdl.steps_order = ['step_bc', 'step_loads']
# Summary
mdl.add(
ElementProperties(name='property',
material='steel',
section='section',
elset='trusses'))
# print(mdl.element_properties['property'])
mdl.add(PinnedDisplacement(name='pinned', nodes='supports'))
# print(mdl.displacements['pinned'])
mdl.add([
PointLoad(name='pointloads', nodes='loads', y=-50000),
GravityLoad(name='gravity', elements='trusses', z=0, y=1),
])
# print(mdl.loads['pointloads'])
# print(mdl.loads['gravity'])
mdl.add([
GeneralStep(name='bc', displacements='pinned'),
GeneralStep(name='loads', loads=['pointloads', 'gravity'], factor=1.5),
])
mdl.steps_order = ['bc', 'loads']
# print(mdl.steps['bc'])
# print(mdl.steps['loads'])
mdl.summary()
