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08-23-2016 08:26 AM

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08-23-2016 02:56 PM

I've done this in the past my making the CBUSH's stiffness nonlinear, where I define a Stiffness vs. Displacement Function.

Create the function first, I use Displacement vs. Force

On the CBUSH Property, I entered a DOF 1 Stiffness as 1.0, and then press the "Nonlinear/Freq Resp.." button, and hook the same DOF to the stiffness funtion -

When a NASTRAN nonlinear job is run, there's no stiffness until the two nodes are 2.0 apart in the CBUSH's x-direction -

Attached is the FEMAP v11.3 .modfem -

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08-23-2016 04:07 PM

Thank you. My model is huge and it takes hours to run non-linear analysis. Will it give it a try and keep you posted.

Thanks

KR

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08-23-2016 10:35 PM

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08-24-2016 08:18 AM

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08-24-2016 08:36 AM

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08-24-2016 10:24 AM

Hi,

I took a similar approach to your example model, but i still have the CBUSH translating lot more than what the function defines. I have the screenshot of function and property attached. I also tried to run with finite length. Am i missing overlooking something? Thank you.

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08-24-2016 10:31 AM

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08-25-2016 07:59 PM

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