OasAerostructDiscipline

from philote_examples import OasAerostructDiscipline

Philote discipline wrapping a complete OAS coupled aerostructural analysis. The internal AerostructPoint group contains a NonlinearBlockGS solver that converges the aero-structural coupling automatically. The wing geometry, structural properties, and mesh are configured at construction time or via gRPC options.

Inherits from: philote_mdo.openmdao.OpenMdaoSubProblem

Constructor

OasAerostructDiscipline(mesh_dict=None, surface_options=None)

Parameters

Name	Type	Default	Description
mesh_dict	dict or None	See below	Dictionary passed to generate_mesh
surface_options	dict or None	None	Extra entries merged into the OAS surface dictionary

Default mesh configuration

{
    "num_y": 5,
    "num_x": 2,
    "wing_type": "CRM",
    "symmetry": True,
    "num_twist_cp": 5,
}

Default surface properties

Property	Default	Description
E	70.0e9	Young's modulus (Pa)
G	30.0e9	Shear modulus (Pa)
yield	200.0e6	Yield stress (Pa), with safety factor 2.5
mrho	3.0e3	Material density (kg/m^3)
fem_origin	0.35	Chordwise FEM origin
wing_weight_ratio	2.0	Wing weight multiplier
thickness_cp	[0.1, 0.2, 0.3]	Thickness control points (m)
with_viscous	True	Enable viscous drag
CD0	0.015	Parasitic drag coefficient

Philote Options

Option	Type	Description
mesh_dict	dict	Overrides mesh_dict constructor argument
surface	dict	Overrides surface_options constructor argument

Methods

initialize()

Declares mesh_dict and surface as available Philote options.

set_options(options)

Stores option values from the client. Called automatically by the Philote framework when a client sends options via send_options().

setup()

Builds the discipline (mesh generation, group creation, variable mapping) then calls the base class setup() to initialize the internal OpenMDAO problem.

Mapped Inputs

Philote Name	OpenMDAO Path	Shape	Units
v	v	(1,)	m/s
alpha	alpha	(1,)	deg
Mach_number	Mach_number	(1,)	--
re	re	(1,)	1/m
rho	rho	(1,)	kg/m^3
CT	CT	(1,)	1/s
R	R	(1,)	m
W0	W0	(1,)	kg
speed_of_sound	speed_of_sound	(1,)	m/s
load_factor	load_factor	(1,)	--
empty_cg	empty_cg	(3,)	m

Mapped Outputs

Philote Name	OpenMDAO Path	Shape	Units
CL	AS_point_0.wing_perf.CL	(1,)	--
CD	AS_point_0.wing_perf.CD	(1,)	--
CM	AS_point_0.CM	(3,)	--
fuelburn	AS_point_0.fuelburn	(1,)	kg
failure	AS_point_0.wing_perf.failure	(1,)	--
structural_mass	wing.structural_mass	(1,)	kg

---

OasGeomDiscipline

from philote_examples import OasGeomDiscipline

Philote discipline wrapping OAS AerostructGeometry for the split aerostructural decomposition. Produces mesh, structural nodes, stiffness matrices, and other geometry constants consumed by the aero and structural disciplines.

Inherits from: philote_mdo.openmdao.OpenMdaoSubProblem

Constructor

OasGeomDiscipline(mesh_dict=None, surface_options=None)

Parameters, defaults, options, and methods follow the same pattern as OasAerostructDiscipline.

Mapped Inputs

Philote Name	OpenMDAO Path	Shape	Units
twist_cp	twist_cp	(num_twist_cp,)	deg
thickness_cp	thickness_cp	(num_thickness_cp,)	m

Inputs are only mapped when the corresponding control points exist in the surface dictionary.

Mapped Outputs

Philote Name	OpenMDAO Path	Shape	Units
mesh	wing.mesh	(nx, ny, 3)	m
nodes	wing.nodes	(ny, 3)	m
t_over_c	wing.t_over_c	(1, ny-1)	--
local_stiff_transformed	wing.local_stiff_transformed	(ny-1, 12, 12)	--
radius	wing.radius	(ny-1,)	m
thickness	wing.thickness	(1, ny-1)	m
structural_mass	wing.structural_mass	(1,)	kg
cg_location	wing.cg_location	(3,)	m

---

OasSplitAeroDiscipline

from philote_examples import OasSplitAeroDiscipline

Philote discipline wrapping the aerodynamic portion of the aerostructural analysis: displacement transfer, VLM geometry, VLM solve, load transfer, and aerodynamic functionals.

Inherits from: philote_mdo.openmdao.OpenMdaoSubProblem

Constructor

OasSplitAeroDiscipline(mesh_dict=None, surface_options=None)

Parameters, defaults, options, and methods follow the same pattern as OasAerostructDiscipline.

Mapped Inputs

Philote Name	OpenMDAO Path	Shape	Units	Source
v	v	(1,)	m/s	Flow condition
alpha	alpha	(1,)	deg	Flow condition
Mach_number	Mach_number	(1,)	--	Flow condition
re	re	(1,)	1/m	Flow condition
rho	rho	(1,)	kg/m^3	Flow condition
mesh	mesh	(nx, ny, 3)	m	Geometry discipline
nodes	nodes	(ny, 3)	m	Geometry discipline
t_over_c	t_over_c	(1, ny-1)	--	Geometry discipline
disp	disp	(ny, 6)	--	Structural discipline (coupling)

Mapped Outputs

Philote Name	OpenMDAO Path	Shape	Units	Destination
loads	loads	(ny, 6)	--	Structural discipline (coupling)
CL	CL	(1,)	--	Performance output
CD	CD	(1,)	--	Performance output

---

OasSplitStructDiscipline

from philote_examples import OasSplitStructDiscipline

Philote discipline wrapping the structural portion of the aerostructural analysis: spatial beam finite-element solve and failure computation.

Inherits from: philote_mdo.openmdao.OpenMdaoSubProblem

Constructor

OasSplitStructDiscipline(mesh_dict=None, surface_options=None)

Parameters, defaults, options, and methods follow the same pattern as OasAerostructDiscipline.

Mapped Inputs

Philote Name	OpenMDAO Path	Shape	Units	Source
loads	loads	(ny, 6)	--	Aero discipline (coupling)
local_stiff_transformed	local_stiff_transformed	(ny-1, 12, 12)	--	Geometry discipline
nodes	nodes	(ny, 3)	m	Geometry discipline
radius	radius	(ny-1,)	m	Geometry discipline
thickness	thickness	(1, ny-1)	m	Geometry discipline

Mapped Outputs

Philote Name	OpenMDAO Path	Shape	Units	Destination
disp	disp	(ny, 6)	--	Aero discipline (coupling)
failure	failure	(1,)	--	Performance output

---

Shape Notation

All shape-dependent variables use nx and ny which depend on the mesh configuration:

• nx = mesh_dict["num_x"]
• ny = mesh_dict["num_y"] if symmetry is False, otherwise (num_y + 1) // 2

For the default mesh (num_y=5, num_x=2, symmetry=True): nx=2, ny=3. For the large mesh (num_y=21, num_x=7, symmetry=True): nx=7, ny=11.