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Relative Displacement Amplitudes of Eigenfrequencies

Posted 26 janv. 2018, 18:04 UTC−5 Structural & Acoustics, Acoustics & Vibrations Version 5.3 1 Reply

Ben Levy
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Hi All

I have successfully used an Eigenfrequnecy study to determine the the eigenfrequnecies of a gelatin cylinder. Now I would like to determine the relative intensities of each mode. In other words, for a given driving force, how large are the resulting displacments. (I dont' need absolute magnitudes -- just reltive magnitudes). Can anyone please walk me through the steps of obtaining this?

Thank you Ben

1 Reply Last Post 27 janv. 2018, 18:05 UTC−5
Dave Greve
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Posted: 7 years ago 27 janv. 2018, 18:05 UTC−5

for a given driving force

If you want the response due to a known driving force, then you want to do a sinusoidal steady state (frequency dependent) analysis.

The eigenmode analysis gives you the frequencies of the modes (only).

D.W. Greve DWGreve Consulting

> for a given driving force If you want the response due to a known driving force, then you want to do a sinusoidal steady state (frequency dependent) analysis. The eigenmode analysis gives you the frequencies of the modes (only). D.W. Greve DWGreve Consulting

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