rayleigh

Forum for OpenSees users to post questions, comments, etc. on the use of the OpenSees interpreter, OpenSees.exe

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xiaojack
Posts: 16
Joined: Thu Oct 12, 2017 7:42 pm

rayleigh

Post by xiaojack »

dear everyone
need help
rayleigh $alphaM $betaK $betaKinit $betaKcomm,How do you use this stiffness($betaKcomm)? What does this stiffness mean($betaKcomm)?
selimgunay
Posts: 916
Joined: Mon Sep 09, 2013 8:50 pm
Location: University of California, Berkeley

Re: rayleigh

Post by selimgunay »

That means tangent sitffness proportional damping, where tangent stiffness corresponds to that at the end of an time step not each iteration
xiaojack
Posts: 16
Joined: Thu Oct 12, 2017 7:42 pm

Re: rayleigh

Post by xiaojack »

selimgunay wrote:
> That means tangent sitffness proportional damping, where tangent stiffness
> corresponds to that at the end of an time step not each iteration
dear selimgunay
sorry ,Is it equivalent stiffness?Can you explain a little bit more, is this tangent stiffness, is this tangent stiffness per time step, or is this line connecting the starting and ending points of each time step, or have you seen any literature on this stiffness? Thank you very much
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