Are CBUSH elements compatible with NLSTAT analysis in OptiStruct?
Hi, I am trying to find out if CBUSH elements are compatible in NLSTAT analysis.
From attending the lectures for OptiStruct for Non-Linear Analysis by Altair, I have found out that CBUSH1D elements are indeed compatible. What about CBUSH elements? I want to find out if I can reuse an already existing model which I built for a certain linear analysis (that incorporates CBUSH elements) in a non-linear one.
Also, if anyone could provide a resource where I can check this for other elements as well, it would be very helpful.
Best Answer
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Hi,
Sure. CBUSH and CBUSH1D are both available for NLSTAT.
But if you just provide the stiffness of each DOF, it will act as a linear spring/bushing.
If you want it to have a NL behavior, you should add a force x disp curve for the intended DOFs, using the KN options for the PBUSH.
Take a look at the help for PBUSHT, for more info.
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Altair EmployeeAnswers
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Hi,
Sure. CBUSH and CBUSH1D are both available for NLSTAT.
But if you just provide the stiffness of each DOF, it will act as a linear spring/bushing.
If you want it to have a NL behavior, you should add a force x disp curve for the intended DOFs, using the KN options for the PBUSH.
Take a look at the help for PBUSHT, for more info.
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Adriano A. Koga_21884 said:
Hi,
Sure. CBUSH and CBUSH1D are both available for NLSTAT.
But if you just provide the stiffness of each DOF, it will act as a linear spring/bushing.
If you want it to have a NL behavior, you should add a force x disp curve for the intended DOFs, using the KN options for the PBUSH.
Take a look at the help for PBUSHT, for more info.
Thanks for the super quick response!
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Hello Martina,
Please also refer to this article for more details: https://community.altair.com/csm/en/how-to-model-non-linear-spring-in-optistruct?id=kb_article&sys_id=021d0ee81bfbad10c4dfdbd9dc4bcb01
Thanks
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