chrono::modal::ChModalDampingFactorAssembly Class Reference

Description

Class for setting the damping via N damping factors z_i for all the modes of the subassembly, where assembly n.modes = (boundary coords+internal modes) R^ = V'^-1 * Dd * V^-1
with Dd=diag { 2 z_1 w_1, 2 z_2 w_2, ..., 2 z_i w_i },
and V = eigenvectors of (M^, K^).

Note there can be more z_i than in the case of ChModalDampingFactorRmm, ex. if one has 2 dynamic modes and 6 static modes, here you can have 8 z_i.

#include <ChModalDamping.h>

Inheritance diagram for chrono::modal::ChModalDampingFactorAssembly:
Collaboration diagram for chrono::modal::ChModalDampingFactorAssembly:

Public Member Functions

 ChModalDampingFactorAssembly (ChVectorDynamic<> factors)
 Construct from the z_i in coefficients in Rmm=diag { 2 z_1 w_1, 2 z_2 w_2, ..., 2 z_i w_i } for modes, and from alpha-beta Rayleight coefficients for boundary nodes.
 
virtual void ComputeR (ChModalAssembly &assembly, const ChMatrixDynamic<> &modal_M, const ChMatrixDynamic<> &modal_K, const ChMatrixDynamic<> &Psi, ChMatrixDynamic<> &modal_R) const
 

Public Attributes

ChVectorDynamic damping_factors
 

Member Function Documentation

◆ ComputeR()

void chrono::modal::ChModalDampingFactorAssembly::ComputeR ( ChModalAssembly assembly,
const ChMatrixDynamic<> &  modal_M,
const ChMatrixDynamic<> &  modal_K,
const ChMatrixDynamic<> &  Psi,
ChMatrixDynamic<> &  modal_R 
) const
virtual

< n of lower modes //***TODO*** make parametric

< lower freq, for shift&invert. //***TODO*** lower value of sigma working in Debug but not in Release !?!?!

< upper limit for the number of iterations, if iterative solver

< tolerance for the iterative solver.

< turn to true to see some diagnostic.

solver to use (default Lanczos)

Implements chrono::modal::ChModalDamping.


The documentation for this class was generated from the following files:
  • /builds/uwsbel/chrono/src/chrono_modal/ChModalDamping.h
  • /builds/uwsbel/chrono/src/chrono_modal/ChModalDamping.cpp