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Frequency-dependent loading with parametric sweep

Posted 9 mars 2011, 06:07 UTC−5 Parameters, Variables, & Functions, Studies & Solvers, Structural Mechanics Version 4.1 3 Replies

Gee
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Hello,

I am doing a Harmonic Analysis, but what I really want to is to apply a frequency sweep but with different boundary loads for each frequency.

Does anyone know if this is possible.


Many thanks
3 Replies Last Post 11 mars 2011, 01:33 UTC−5
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 9 mars 2011, 10:59 UTC−5
Hi

the frequency sweep parameter is "freq" so why not, on a simple model you can predict analytically, you add a BC condition linked to "freq" or omega=2*pi*freq

--
Good luck
Ivar
Hi the frequency sweep parameter is "freq" so why not, on a simple model you can predict analytically, you add a BC condition linked to "freq" or omega=2*pi*freq -- Good luck Ivar
Gee
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Posted: 1 decade ago 10 mars 2011, 11:22 UTC−5
Thanks Ivar,

I am still not clear on how to implement this. Instead of carrying out separate runs at each frequency using different amplitudes, I want to tell do a parameter sweep but tell comsol at each frequency to use a different amplitude which I will supply. This will save a whole load of time. I am not sure how to actually implement this in Comsol.

Cheers
Thanks Ivar, I am still not clear on how to implement this. Instead of carrying out separate runs at each frequency using different amplitudes, I want to tell do a parameter sweep but tell comsol at each frequency to use a different amplitude which I will supply. This will save a whole load of time. I am not sure how to actually implement this in Comsol. Cheers
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 11 mars 2011, 01:33 UTC−5
Hi

I'm not sure I catch you:

a) use a double parametrical sweep
b) define V(freq) and set up an analytical or interpolated function such that V(freq) takes the shape at the given frequency as you want

--
Good luck
Ivar
Hi I'm not sure I catch you: a) use a double parametrical sweep b) define V(freq) and set up an analytical or interpolated function such that V(freq) takes the shape at the given frequency as you want -- Good luck Ivar

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