def testTiltDownwind(self):
self.discrete_inputs["upwind"] = False
self.inputs["tilt"] = 5.0
self.inputs["overhang"] = 5 + (2 + 4.5) * ct
self.inputs["drive_height"] = 4.875 + (2 + 4.5) * st
myobj = lay.DirectLayout()
myobj.compute(self.inputs, self.outputs, self.discrete_inputs,
self.discrete_outputs)
self.assertAlmostEqual(self.outputs["L_nose"], 3.5)
self.assertAlmostEqual(self.outputs["L_lss"], 3.0)
self.assertAlmostEqual(self.outputs["L_drive"], 4.5)
self.assertAlmostEqual(
self.outputs["L_bedplate"],
self.inputs["overhang"] - (2 + self.outputs["L_drive"]) * ct)
self.assertAlmostEqual(
self.outputs["H_bedplate"],
self.inputs["drive_height"] - (2 + self.outputs["L_drive"]) * st)
self.assertAlmostEqual(self.outputs["D_bearing1"], 2.3 - 0.05 - 1.33)
self.assertAlmostEqual(self.outputs["D_bearing2"], 2.3 - 0.05 - 1.33)
npt.assert_equal(self.outputs["constr_access"][:, -1],
1.33 - 0.08 - 0.9)
npt.assert_equal(self.outputs["constr_access"][:, 0],
2.3 - 0.1 - 1.33 - 0.25 * 0.9)
self.assertAlmostEqual(
self.outputs["constr_length"],
self.inputs["overhang"] - (2 + self.outputs["L_drive"]) * ct -
0.5 * self.inputs["D_top"],
)
self.assertAlmostEqual(self.outputs["constr_height"],
self.outputs["H_bedplate"])
self.assertAlmostEqual(self.outputs["s_rotor"], 2 + 1.5 + 0.5)
self.assertAlmostEqual(self.outputs["s_stator"], 0.75)
self.assertAlmostEqual(self.outputs["s_mb1"], 1.5 + 2.0)
self.assertAlmostEqual(self.outputs["s_mb2"], 1.5)
self.assertAlmostEqual(self.outputs["x_bedplate"][-1], 5.0)
self.assertAlmostEqual(self.outputs["x_bedplate_inner"][-1], 5.0)
self.assertAlmostEqual(self.outputs["x_bedplate_outer"][-1], 5.0)
self.assertAlmostEqual(self.outputs["x_bedplate"][0], 0.0)
self.assertAlmostEqual(self.outputs["x_bedplate_inner"][0], 0.5 * 6.5)
self.assertAlmostEqual(self.outputs["x_bedplate_outer"][0], -0.5 * 6.5)
self.assertAlmostEqual(self.outputs["D_bedplate"][0], 6.5)
self.assertAlmostEqual(self.outputs["z_bedplate"][0], 0.0)
self.assertAlmostEqual(self.outputs["z_bedplate_inner"][0], 0.0)
self.assertAlmostEqual(self.outputs["z_bedplate_outer"][0], 0.0)
self.assertAlmostEqual(self.outputs["z_bedplate"][-1], 4.875)
self.assertAlmostEqual(self.outputs["z_bedplate_inner"][-1],
4.875 - 0.5 * 1.33)
self.assertAlmostEqual(self.outputs["z_bedplate_outer"][-1],
4.875 + 0.5 * 1.33)
self.assertAlmostEqual(self.outputs["D_bedplate"][-1], 1.33)
def testMassValues(self):
self.discrete_inputs["upwind"] = True
self.inputs["tilt"] = 0.0
self.inputs["drive_height"] = 5.0
self.inputs["D_top"] = 3.0
self.inputs["overhang"] = 4.5 + 3.5 + 0.5 * 3.0 + 2
myones = np.ones(5)
self.inputs["lss_diameter"] = 2.0 * myones
self.inputs["nose_diameter"] = 3.0 * myones
self.inputs["lss_wall_thickness"] = 0.05 * myones
self.inputs["nose_wall_thickness"] = 0.05 * myones
self.inputs["bedplate_wall_thickness"] = 0.05 * np.ones(npts)
myobj = lay.DirectLayout()
myobj.compute(self.inputs, self.outputs, self.discrete_inputs,
self.discrete_outputs)
rho = self.inputs["lss_rho"]
m_bedplate = 5 * 0.5 * np.pi * np.pi * (1.5**2 - (1.5 - 0.05)**2) * rho
self.assertAlmostEqual(self.outputs["bedplate_mass"], m_bedplate)
self.assertAlmostEqual(self.outputs["bedplate_cm"][0],
np.mean(self.outputs["x_bedplate"]), 0)
self.assertAlmostEqual(self.outputs["bedplate_cm"][1], 0.0)
self.assertAlmostEqual(self.outputs["bedplate_cm"][2],
np.mean(self.outputs["z_bedplate"]), 0)
m_lss = rho * np.pi * (1**2 - 0.95**2) * self.outputs["L_lss"]
self.assertAlmostEqual(self.outputs["lss_mass"], m_lss)
self.assertAlmostEqual(
self.outputs["lss_cm"],
0.5 * (self.outputs["s_lss"][0] + self.outputs["s_lss"][-1]))
self.assertAlmostEqual(self.outputs["lss_I"][0],
0.5 * m_lss * (1**2 + 0.95**2))
self.assertAlmostEqual(self.outputs["lss_I"][1], (1 / 12) * m_lss *
(3 *
(1**2 + 0.95**2) + self.outputs["L_lss"]**2))
m_nose = rho * np.pi * (1.5**2 - 1.45**2) * self.outputs["L_nose"]
self.assertAlmostEqual(self.outputs["nose_mass"], m_nose)
self.assertAlmostEqual(
self.outputs["nose_cm"],
0.5 * (self.outputs["s_nose"][0] + self.outputs["s_nose"][-1]))
self.assertAlmostEqual(self.outputs["nose_I"][0],
0.5 * m_nose * (1.5**2 + 1.45**2))
self.assertAlmostEqual(
self.outputs["nose_I"][1], (1 / 12) * m_nose *
(3 * (1.5**2 + 1.45**2) + self.outputs["L_nose"]**2))
def testBedplateLengthHeight(self):
self.inputs["tilt"] = 0.0
myobj = lay.DirectLayout()
myobj.compute(self.inputs, self.outputs, self.discrete_inputs,
self.discrete_outputs)
self.assertAlmostEqual(self.outputs["L_nose"], 3.5)
self.assertAlmostEqual(self.outputs["L_lss"], 3.0)
self.assertAlmostEqual(self.outputs["L_drive"], 4.5)
self.assertAlmostEqual(self.outputs["L_bedplate"], 5.0)
self.assertAlmostEqual(self.outputs["H_bedplate"], 4.875)
self.assertAlmostEqual(self.outputs["constr_length"], 5 - 0.5 * 6.5)
self.assertAlmostEqual(self.outputs["constr_height"], 4.875)
self.inputs["overhang"] = 2.0 + 0.5 * 6.5 + 2
myobj.compute(self.inputs, self.outputs, self.discrete_inputs,
self.discrete_outputs)
self.assertAlmostEqual(self.outputs["L_nose"], 3.5)
self.assertAlmostEqual(self.outputs["L_lss"], 3.0)
self.assertAlmostEqual(self.outputs["L_drive"], 4.5)
self.assertAlmostEqual(self.outputs["L_bedplate"], 0.5 * 6.5)
self.assertAlmostEqual(self.outputs["H_bedplate"], 4.875)
self.assertAlmostEqual(self.outputs["constr_length"], -2.5)
self.assertAlmostEqual(self.outputs["constr_height"], 4.875)
def setup(self):
opt = self.options["modeling_options"]["WISDEM"]["DriveSE"]
n_dlcs = self.options["n_dlcs"]
direct = opt["direct"]
dogen = self.options["modeling_options"]["flags"]["generator"]
n_pc = self.options["modeling_options"]["WISDEM"]["RotorSE"]["n_pc"]
self.set_input_defaults("machine_rating", units="kW")
self.set_input_defaults("planet_numbers", [3, 3, 0])
self.set_input_defaults("gear_configuration", "eep")
self.set_input_defaults("hvac_mass_coeff", 0.025, units="kg/kW/m")
# self.set_input_defaults('mb1Type', 'CARB')
# self.set_input_defaults('mb2Type', 'SRB')
self.set_input_defaults("uptower", True)
self.set_input_defaults("upwind", True)
self.set_input_defaults("n_blades", 3)
# Materials prep
self.add_subsystem(
"mat",
DriveMaterials(
direct=direct,
n_mat=self.options["modeling_options"]["materials"]["n_mat"]),
promotes=["*"],
)
# Need to do these first, before the layout
self.add_subsystem("hub",
Hub_System(modeling_options=opt["hub"]),
promotes=["*"])
self.add_subsystem("gear",
Gearbox(direct_drive=direct),
promotes=["*"])
# Layout and mass for the big items
if direct:
self.add_subsystem("layout", lay.DirectLayout(), promotes=["*"])
else:
self.add_subsystem("layout", lay.GearedLayout(), promotes=["*"])
# All the smaller items
self.add_subsystem("bear1", dc.MainBearing())
self.add_subsystem("bear2", dc.MainBearing())
self.add_subsystem("brake",
dc.Brake(direct_drive=direct),
promotes=["*"])
self.add_subsystem("elec", dc.Electronics(), promotes=["*"])
self.add_subsystem("yaw",
dc.YawSystem(),
promotes=[
"yaw_mass", "yaw_I", "yaw_cm", "rotor_diameter",
"D_top"
])
# Generator
self.add_subsystem("rpm", dc.RPM_Input(n_pc=n_pc), promotes=["*"])
if dogen:
gentype = self.options["modeling_options"]["WISDEM"][
"GeneratorSE"]["type"]
self.add_subsystem(
"generator",
Generator(design=gentype, n_pc=n_pc),
promotes=[
"generator_mass",
"generator_cost",
"generator_I",
"machine_rating",
"generator_efficiency",
"rated_torque",
("rotor_mass", "generator_rotor_mass"),
("rotor_I", "generator_rotor_I"),
("stator_mass", "generator_stator_mass"),
("stator_I", "generator_stator_I"),
],
)
else:
self.add_subsystem("gensimp",
dc.GeneratorSimple(direct_drive=direct,
n_pc=n_pc),
promotes=["*"])
# Final tallying
self.add_subsystem("misc", dc.MiscNacelleComponents(), promotes=["*"])
self.add_subsystem("nac", dc.NacelleSystemAdder(), promotes=["*"])
self.add_subsystem("rna", dc.RNA_Adder(), promotes=["*"])
# Structural analysis
self.add_subsystem("lss",
ds.Hub_Rotor_LSS_Frame(n_dlcs=n_dlcs,
modeling_options=opt,
direct_drive=direct),
promotes=["*"])
if direct:
self.add_subsystem("nose",
ds.Nose_Stator_Bedplate_Frame(
modeling_options=opt, n_dlcs=n_dlcs),
promotes=["*"])
else:
self.add_subsystem("hss",
ds.HSS_Frame(modeling_options=opt,
n_dlcs=n_dlcs),
promotes=["*"])
self.add_subsystem("bed",
ds.Bedplate_IBeam_Frame(modeling_options=opt,
n_dlcs=n_dlcs),
promotes=["*"])
# Output-to-input connections
self.connect("bedplate_rho", ["pitch_system.rho", "spinner.metal_rho"])
self.connect("bedplate_Xy", ["pitch_system.Xy", "spinner.Xy"])
self.connect("bedplate_mat_cost", "spinner.metal_cost")
self.connect("hub_rho", ["hub_shell.rho", "rho_castiron"])
self.connect("hub_Xy", "hub_shell.Xy")
self.connect("hub_mat_cost", "hub_shell.metal_cost")
self.connect("spinner_rho",
["spinner.composite_rho", "rho_fiberglass"])
self.connect("spinner_Xt", "spinner.composite_Xt")
self.connect("spinner_mat_cost", "spinner.composite_cost")
if direct:
self.connect("D_bearing1", "bear1.D_bearing")
self.connect("D_bearing2", "bear2.D_bearing")
self.connect("bear1.mb_mass", "mb1_mass")
self.connect("bear1.mb_I", "mb1_I")
self.connect("bear1.mb_max_defl_ang", "mb1_max_defl_ang")
self.connect("s_mb1", "mb1_cm")
self.connect("bear2.mb_mass", "mb2_mass")
self.connect("bear2.mb_I", "mb2_I")
self.connect("bear2.mb_max_defl_ang", "mb2_max_defl_ang")
self.connect("s_mb2", "mb2_cm")
self.connect("bedplate_rho", "yaw.rho")
self.connect("s_gearbox", "gearbox_cm")
self.connect("s_generator", "generator_cm")
if dogen:
self.connect("generator.R_out", "R_generator")
self.connect("bedplate_E", "generator.E")
self.connect("bedplate_G", "generator.G")
if direct:
self.connect("lss_rpm", "generator.shaft_rpm")
self.connect("torq_deflection", "generator.y_sh")
self.connect("torq_rotation", "generator.theta_sh")
self.connect("stator_deflection", "generator.y_bd")
self.connect("stator_rotation", "generator.theta_bd")
self.linear_solver = lbgs = om.LinearBlockGS()
self.nonlinear_solver = nlbgs = om.NonlinearBlockGS()
nlbgs.options["maxiter"] = 3
nlbgs.options["atol"] = nlbgs.options["atol"] = 1e-2
nlbgs.options["iprint"] = 0
else:
self.connect("hss_rpm", "generator.shaft_rpm")
def compute_layout(self, direct=True):
myobj = lay.DirectLayout() if direct else lay.GearedLayout()
myobj.compute(self.inputs, self.outputs, self.discrete_inputs,
self.discrete_outputs)
for k in self.outputs.keys():
self.inputs[k] = self.outputs[k]