Damping

[ambaker]

I am struggling to understand the documentation for the Rayleigh command.

These are the inputs to the Rayleigh command:
$alphaM factor applied to elements or nodes mass matrix
$betaK factor applied to elements current stiffness matrix.
$betaKinit factor applied to elements initial stiffness matrix.
$betaKcomm factor applied to elements committed stiffness matrix.

I understand the first three, but what is the "committed stiffness matrix"?

-Alex

[selimgunay]

That is the stiffness matrix at the end of an integration time step, not the one used in the iterations

[ambaker]

That makes sense.
Thank you!