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Does anyone know how to do a prestressed vibration analysis by ADINA?

Does anyone know how to do a prestressed vibration analysis by ADINA?

Does anyone know how to do a prestressed vibration analysis by ADINA?

(OP)
I found an ADINA example about doing a prestressed vibration analysis of a cylinder shell. I followed the example step by step, but finally I got the results show that the natural frequencies of that shell were the same as well as when the shell was not under prestressed status. I think that example must have something wrong or missing. Could anybody tell me the process of doing this kind of prestress problem?
Thank you very much!

RE: Does anyone know how to do a prestressed vibration analysis by ADINA?

Ina linear analysis where bending is the predominant elasticity then pre stress does not affect the modal frequencies or shapes.

Cheers

Greg Locock

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