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Is it possible to apply constant pressure and acceleration in Modal FRF analysis in Optistruct? If yes then what will be the cards and analysis setup. Thanks
for your case, you might want to apply a preload loadstep, maybe?
https://2021.help.altair.com/2021/hwsolvers/os/topics/solvers/os/preload_modal_frequency_response_analysis_os_example_r.htm
preload takes into account stiffening caused by the preload into your FRF.
Just take care with stresses, as these need to be added by post-processing.
https://2021.help.altair.com/2021/hwsolvers/os/topics/solvers/os/analysis_prestressed_r.htm?zoom_highlightsub=preload
Thanks Adriano. This will help. Is it possible to share the .fem file? Thanks
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