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Different excitation loads in Frequency Response Analysis

Posted Nov 16, 2010, 7:10 a.m. EST Version 3.5a 3 Replies

Gee
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Please, is it possible to assign different boundary loads to different excitation frequencies when using Frequency Response Aanlysis? At present all I am ble to do is apply a single load at multiple frequencies.

Many thanks
3 Replies Last Post Aug 3, 2011, 5:18 p.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Nov 16, 2010, 9:52 a.m. EST
Hi

I have never tried it, but why not: normally the frequency sweep name is "freq" so why not use it to express a BC and test it out, take a simple case you are sure to understand.

And pls report back, interesting question ;)

--
Good luck
Ivar
Hi I have never tried it, but why not: normally the frequency sweep name is "freq" so why not use it to express a BC and test it out, take a simple case you are sure to understand. And pls report back, interesting question ;) -- Good luck Ivar
Gee
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Posted: 1 decade ago Nov 16, 2010, 1:23 p.m. EST
Hi,

No luck with the 'freq' command in the BC, even for a single load and single frequency. I only get results with a load value.

If you manage to get a solution, pls let me know.

Many thanks
Hi, No luck with the 'freq' command in the BC, even for a single load and single frequency. I only get results with a load value. If you manage to get a solution, pls let me know. Many thanks
Angel Suresh
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Posted: 1 decade ago Aug 3, 2011, 5:18 p.m. EDT
Hi,

I am wondering if you got to solve your problem.

I am trying to model a pressurized pipe with a point load that acts as a source of vibration. I am not able to apply the pressure without the solver considering both the pressure and point load to be vibration sources.

Thanks,
Angel Suresh
Hi, I am wondering if you got to solve your problem. I am trying to model a pressurized pipe with a point load that acts as a source of vibration. I am not able to apply the pressure without the solver considering both the pressure and point load to be vibration sources. Thanks, Angel Suresh

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