fastga.models.geometry.geometry module

FAST - Copyright (c) 2016 ONERA ISAE.

class fastga.models.geometry.geometry.GeometryFixedFuselage(**kwargs)

Bases: openmdao.core.group.Group

Computes geometric characteristics of the (tube-wing) aircraft:

• fuselage size is computed from payload requirements

• wing dimensions are computed from global parameters (area, taper ratio…)

• tail planes are dimensioned from HQ requirements

The hypothesis done is a fixed rear_length that fixes fuselage length leading to tail-wing distance changes when wing position change. This results in a mainly-linear behaviour on the static margin derivative relative to wing position.

Set the solvers to nonlinear and linear block Gauss–Seidel by default.

initialize()

Perform any one-time initialization run at instantiation.

setup()

Build this group.

This method should be overidden by your Group’s method. The reason for using this method to add subsystem is to save memory and setup time when using your Group while running under MPI. This avoids the creation of systems that will not be used in the current process.

You may call ‘add_subsystem’ to add systems to this group. You may also issue connections, and set the linear and nonlinear solvers for this group level. You cannot safely change anything on children systems; use the ‘configure’ method instead.

Available attributes:

name pathname comm options

class fastga.models.geometry.geometry.GeometryFixedTailDistance(**kwargs)

Bases: openmdao.core.group.Group

Computes geometric characteristics of the (tube-wing) aircraft:

• fuselage size is computed from payload requirements

• wing dimensions are computed from global parameters (area, taper ratio…)

• tail planes are dimensioned from HQ requirements

The hypothesis done is a fixed tail-wing distance leading to fuselage variation (rear_length) when wing position changes. This results in a highly non-linear behaviour on the static margin derivative relative to wing position.

Set the solvers to nonlinear and linear block Gauss–Seidel by default.

initialize()

Perform any one-time initialization run at instantiation.

setup()

Build this group.

This method should be overidden by your Group’s method. The reason for using this method to add subsystem is to save memory and setup time when using your Group while running under MPI. This avoids the creation of systems that will not be used in the current process.

You may call ‘add_subsystem’ to add systems to this group. You may also issue connections, and set the linear and nonlinear solvers for this group level. You cannot safely change anything on children systems; use the ‘configure’ method instead.

Available attributes:

name pathname comm options