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Mode shapes for a 3D cylindrical structure in 4.3b
Posted 08.12.2014, 18:07 GMT-5 Structural Mechanics 0 Replies
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When I look at the 3D plot of each eigenfrequency, I see that the n mode counts (axial wavelengths) match my analytical values exactly. The m mode counts (circumferential half-waves), however, vary wildly and randomly. Out of 100 calculated eigenfrequencies in the range of 340 - 2500 Hz, only 3 results have the same m value as the analytical.
1) Is there any explanation for this?
The closely-matched frequencies came from a structural/solid model, with prescribed displacement to emulate simply-supported. I had run a shell with pinned boundary conditions, but the eigenfrequencies didn't match up with my analytical.
2) Is there a way to get a list or table of the m & n values for each eigenfrequency? Looking at each plot & counting is really tedious.
Thank you for any assistance with this,
Rebecca
Hello Rebecca Clemens
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