Project Chrono: chrono::fea::DampingCoefficients Struct Reference

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chrono::fea::DampingCoefficients Struct Reference
Chrono::Engine » Finite Element Analysis » Utility classes

## Description

This damping model supports you to assign different Rayleigh damping coefficients for different dimensions, which would be helpful for those anisotropic material, such as wind turbine blade.

Note, the square of these four parameters(bx/by/bz/bt) are the beta coefficient of Rayleigh damping model of beam element. alpha is the mass-proportional damping coefficient. Because the mass matrix might be lumped or consistent type, for the sake of simplification, the mass-proportional damping matrix is evaluated simply as Rm+=alpha*M, instead of four different values as stiffness-proportional term. This damping model is used in ChElementBeamTaperedTimoshenko and ChElementBeamTaperedTimoshenkoFPM. For more background theory, please refer to: [1]. Hansen, M. H. (2001). Anisotropic damping of Timoshenko beam elements. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1267(EN)).

`#include <ChBeamSectionTaperedTimoshenko.h>`

## Public Attributes
double | bx
| damping coefficient along x axis (axial)
double | by
| damping coefficient along y axis (shear) and about z axis (bending)
double | bz
| damping coefficient along z axis (shear) and about y axis (bending)
double | bt
| damping coefficient about x axis (torsion)
double | alpha = 0.0
| mass-proportional damping coefficient, be zero as default

The documentation for this struct was generated from the following file:

- D:/W/B/src/chrono-9.0.1/src/chrono/fea/ChBeamSectionTaperedTimoshenko.h