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Relative Energy from Eigenfrequency Analysis

Posted 9 ott 2013, 13:59 GMT-4 Studies & Solvers Version 4.0a 1 Reply

Brandon Voelker

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Hello All,

I have been working with COMSOL 4.0 (mostly heat transfer modules) but now need to analyze a structure with an eigenfrequency analysis.

I can generate the model and the eigenfrequency(s), but I would like to end up with the results presented as a plot of frequency vs energy.

Anybody know the steps I need to take using 4.0a?

Thanks Everyone

1 Reply Last Post 9 ott 2013, 14:15 GMT-4

Edgar J. Kaiser Certified Consultant

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Posted: 1 decade ago

Hi Brandon,

this has often been discussed in this forum. An eigenmode or eigenfrequency is essentially a mathematical property of the system. It has a certain shape but it doens't have a certain energy or amplitude. The deformations you see in the plots are arbitrary.

If you want to evaluate energies or amplitudes you have to run a frequency domain study and excite the system some way.

Cheers
Edgar

--
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com

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Relative Energy from Eigenfrequency Analysis

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