Mode Shape Stresses

"Richard Brewer" wrote:

Hello

I am currently looking into performing a VIV (Vortex induced Vibration) fatigue analysis on a deepwater rigid spoolpiece. Is there any way we can output the stress associated with the modeshapes that have been calculated in the modal analysis in AutoPIPE? If i was able to do this i could output the modal displacements and the associated stress into an external program. 

Can you help or do you know of some sort of fudge to get the stresses out i.e. harmonic analyses etc??

Thanks in advance

Rich

Parents
  • Richard,

    There is a way to output the mode shapes and element modal forces and moments to an external file. We do not output the stresses as there is no input forcing function assumed.

    Please note that the mode shapes in AutoPIPE are mass normalized.

    You can enable such output by editing the file autopipe.ini in the AutoPIPE folder. You can then use the command Result/Export Eigenvalues (*.txt) to generate the file Modelname_EIG.txt.

    The headers should help you see the type of data being printed.

    Unfortunately we do not have any documentation or guidance on how to use such data. We also do not offer any support on this feature at this time. We hope to incorporate and improve this feature in the future.

    Karim

    Answer Verified By: Mike Dattilio 

Reply
  • Richard,

    There is a way to output the mode shapes and element modal forces and moments to an external file. We do not output the stresses as there is no input forcing function assumed.

    Please note that the mode shapes in AutoPIPE are mass normalized.

    You can enable such output by editing the file autopipe.ini in the AutoPIPE folder. You can then use the command Result/Export Eigenvalues (*.txt) to generate the file Modelname_EIG.txt.

    The headers should help you see the type of data being printed.

    Unfortunately we do not have any documentation or guidance on how to use such data. We also do not offer any support on this feature at this time. We hope to incorporate and improve this feature in the future.

    Karim

    Answer Verified By: Mike Dattilio 

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