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Reopening Temperature Effect on Eigenfrequency
Posted 18 sept. 2017, 17:37 UTC−4 Heat Transfer & Phase Change, Studies & Solvers, Structural Mechanics Version 5.2 1 Reply
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The below post is related to an archived discussion
Hello,
I've been searching for ways to apply a stress-dependent elastic modulus changing due to temperature variations to a time-dependent eigenfrequency study. Right now, I have a 3-step study:
- Stationary solution with gravity to pre-stress the model,
- Time-dependent solution with a diurnal temperature input causing thermal stress and linear changes in the elastic modulus,
- Eigenfrequency (unsuccessful so far) - take the varying elastic modulus field and calculate the first three eigenfrequencies for each time step. I haven't been able to figure out how to input a time-varying solution as the initial solutions for the eigenfrequency calculation.
The archived discussion linked above appears to address this specific case with parametric sweeps. However, the link to the MPH file is now expired. Is there any way the link can be reactivated for download?
Thanks,
Paul Geimer
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To follow up, I'm looking for any suggestions on calculating eigenfrequencies at various times for an object that is being heated and cooled. Has anyone had success with this?
I am looking at using parametric sweeps of a dummy "time" variable to create a number of stationary solutions that can be fed into the eigenfrequency study. However, this seems to make it impossible to properly model thermal diffusion, which is critical for my analysis.
Thanks - Paul