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chrono::fea::ChDampingCosseratLinear Class Reference
Chrono::Engine » Finite Element Analysis » Utility classes

Description

Simple linear lumped damping of beam sections of Cosserat type, {n,m}=f({e',k'}) where damping is proportional to speed of deformation/curvature via linear constants: 

  n = R_e * e'
  m = R_k * k'

#include <ChBeamSectionCosserat.h>

Inheritance diagram for chrono::fea::ChDampingCosseratLinear:
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Public Member Functions

virtual void ComputeStress (ChVector3d &stress_n, ChVector3d &stress_m, const ChVector3d &dstrain_e, const ChVector3d &dstrain_k) override
 Compute the generalized cut force and cut torque, caused by structural damping, given actual deformation speed and curvature speed. More...
 
virtual void ComputeDampingMatrix (ChMatrix66d &R, const ChVector3d &dstrain_e, const ChVector3d &dstrain_k) override
 Compute the 6x6 tangent material damping matrix, ie the jacobian [Rm]=dstress/dstrainspeed. More...
 
ChVector3d GetDampingCoefficientsRe ()
 
void SetDampingCoefficientsRe (const ChVector3d mR_e)
 
ChVector3d GetDampingCoefficientsRk ()
 
void SetDampingCoefficientsRk (const ChVector3d mR_k)
 

Additional Inherited Members

- Public Attributes inherited from chrono::fea::ChDampingCosserat
ChBeamSectionCosserat * section
 

Member Function Documentation

◆ ComputeDampingMatrix()

void chrono::fea::ChDampingCosseratLinear::ComputeDampingMatrix ( ChMatrix66d &  R,
const ChVector3d &  dstrain_e,
const ChVector3d &  dstrain_k 
)
overridevirtual

Compute the 6x6 tangent material damping matrix, ie the jacobian [Rm]=dstress/dstrainspeed.

By the way, in this model, it is simply a diagonal matrix with R_e and R_k values on the diagonal.

Parameters
R6x6 material stiffness matrix values here
dstrain_ecurrent strain speed (deformation part)
dstrain_kcurrent strain speed (curvature part)

Reimplemented from chrono::fea::ChDampingCosserat.

◆ ComputeStress()

void chrono::fea::ChDampingCosseratLinear::ComputeStress ( ChVector3d &  stress_n,
ChVector3d &  stress_m,
const ChVector3d &  dstrain_e,
const ChVector3d &  dstrain_k 
)
overridevirtual

Compute the generalized cut force and cut torque, caused by structural damping, given actual deformation speed and curvature speed.

Parameters
stress_nlocal stress (generalized force), x component = traction along beam
stress_mlocal stress (generalized torque), x component = torsion torque along beam
dstrain_elocal strain speed (deformation); x elongation speed; y,z shear speeds
dstrain_klocal strain speed (curvature); x torsion speed; y,z line curvature speeds

Implements chrono::fea::ChDampingCosserat.

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