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non linear frequency analysis

Submitted by phrankie81 on
research

Hi,

I'm trying to run a frequency analysis of a composite beam with non-linear properties in Abaqus. Is it possible to make use of the non-linear properties in the frequency analysis. If so how can I do it?

Composite beam in this case refers to a combination of steel and concrete. 

Any detailed contributions will be appreciated.

Thanks

Anoop.Retheesh

Hi phrankie81,

As far as I know, the frequency analysis cannot involve any kind of nonlinearity, since it is a linear perturbation analysis. At least, all the common commercial FE codes don't have the ability to introduce nonlinearity in a frequency analysis. Also, in my opinion it is not required at all.

 

But by looking at your description, I think you may be interested in 'anisotropic properties' which is a common behaviour of composites. Not the 'nonlinear material properties'. If that is the case, most of the commercial FE softwares can solve it.

 

Regards,

Anoop

Thu, 11/17/2011 - 21:33 Permalink