LinearAssembler¶
- class sharpy.solvers.linearassembler.LinearAssembler[source]¶
Warning
Under development - please advise of new features and bugs!
Creates a workspace containing the different linear elements of the state-space.
The user specifies which elements to build sequentially via the
linear_system
setting.The most common uses will be:
Aerodynamic:
sharpy.linear.assembler.LinearUVLM
solverStructural:
sharpy.linear.assembler.LinearBeam
solverAeroelastic:
sharpy.linear.assembler.LinearAeroelastic
solver
The solver enables to load a user specific assembly of a state-space by means of the
LinearCustom
block.See
sharpy.sharpy.linear.assembler.LinearAssembler
for a detailed description of each of the state-space assemblies.Upon assembly of the linear system, the data structure
data.linear
will be created. TheLinear
contains the state-space as an attribute. This state space will be the one employed by postprocessors.Important: running the linear routines requires information on the tangent mass, stiffness and gyroscopic structural matrices therefore the solver
solvers.modal.Modal
must have been run prior to linearisation. In addition, if the problem includes rigid body velocities, at least one timestep ofsolvers.DynamicCoupled
must have run such that the rigid body velocity is included.Example:
The typical
flow
setting used prior to using this solver for an aeroelastic simulation with rigid body dynamics will be similar to:>>> flow = ['BeamLoader', >>> 'AerogridLoader', >>> 'StaticTrim', >>> 'DynamicCoupled', # a single time step will suffice >>> 'Modal', >>> 'LinearAssembler']
The settings that this solver accepts are given by a dictionary, with the following key-value pairs:
Name
Type
Description
Default
Options
linear_system
str
Name of chosen state space assembly type
None
linear_system_settings
dict
Settings for the desired state space assembler
{}
linearisation_tstep
int
Chosen linearisation time step number from available time steps
-1
modal_tstep
int
Timestep in which modal information is stored. Useful if the
Modal
solver is run at the start of the SHARPy flow.-1
inout_coordinates
str
Input/output coordinates of the system. Nodal or modal space.
``
, ``nodes
,modes
retain_inputs
list(int)
List of input channels to retain in the chosen
inout_coordinates
.[]
retain_outputs
list(int)
List of output channels to retain in the chosen
inout_coordinates
.[]