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"Sensitivity Analysis" and "Eigenfrequency solver"

Posted 2010年2月21日 GMT-5 20:12 Materials Version 5.2 7 Replies

Masoud Ansari
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Hello,

Is there any way that I can perform sensitivity analysis in combination with "eigenfrequency" or "time dependent" solvers?

Thank you,
Masoud
7 Replies Last Post 2016年2月29日 GMT-5 22:23
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2010年2月22日 GMT-5 01:52
Hi

I assume so, but you should perhap be more precise about your input/output needs, is it the eigenfrequency depending on a geometrical dimension, or a material property or ...?

Good luck
Ivar
Hi I assume so, but you should perhap be more precise about your input/output needs, is it the eigenfrequency depending on a geometrical dimension, or a material property or ...? Good luck Ivar
Masoud Ansari
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Posted: 1 decade ago 2010年2月22日 GMT-5 12:40
Hi Ivar,

Thank you for your response.

Basically, my problem is that when I choose one of the "time dependent" or "eigenfrequency" solvers in solver parameters, the "optimization" tab gets turned off. Therefore, I cannot arrange any setting for "sensitivity analysis" and hence cannot use "sensitivity analysis" in combination with "eigenfrequency" or "time dependent" solvers. Please see the attached pictures, which are some screenshots from solver parameters.

Anyway, as for your question I should say my problem at hand is an eigenfrequency analysis depending on a geometrical dimension.

Do you think if there is any way that I can have "sensitivity tab" active while using "eigenfrequency" or "transient" solver?

Many thanks,
Masoud
Hi Ivar, Thank you for your response. Basically, my problem is that when I choose one of the "time dependent" or "eigenfrequency" solvers in solver parameters, the "optimization" tab gets turned off. Therefore, I cannot arrange any setting for "sensitivity analysis" and hence cannot use "sensitivity analysis" in combination with "eigenfrequency" or "time dependent" solvers. Please see the attached pictures, which are some screenshots from solver parameters. Anyway, as for your question I should say my problem at hand is an eigenfrequency analysis depending on a geometrical dimension. Do you think if there is any way that I can have "sensitivity tab" active while using "eigenfrequency" or "transient" solver? Many thanks, Masoud
Jisoo Kim
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Posted: 1 decade ago 2011年3月3日 GMT-5 19:14

I have a same problem.

I have a same problem.
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2011年3月4日 GMT-5 01:11
Hi
for me that means you need to run it via matlab, as the sensitivity "loops" are not programmed into the GUI for eigenfrequencies, its like adding prestressed eigenfrequency analysis, you MUST go via matlab in v3.5, but no longer in v4 :)

--
Good luck
Ivar
Hi for me that means you need to run it via matlab, as the sensitivity "loops" are not programmed into the GUI for eigenfrequencies, its like adding prestressed eigenfrequency analysis, you MUST go via matlab in v3.5, but no longer in v4 :) -- Good luck Ivar
Jisoo Kim
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Posted: 1 decade ago 2011年3月9日 GMT-5 23:10
Hi Ivar,

Thanks for your response.

I attempt frequncy topology optimization using comsol.

Where can I get the reference example or letter for using Comsol with matlab.

-jisoo-

Hi Ivar, Thanks for your response. I attempt frequncy topology optimization using comsol. Where can I get the reference example or letter for using Comsol with matlab. -jisoo-
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2011年3月10日 GMT-5 00:54
Hi

the way I learned was to study the history "m" files, and the doc

--
Good luck
Ivar
Hi the way I learned was to study the history "m" files, and the doc -- Good luck Ivar
Dustin Gerrard
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Posted: 9 years ago 2016年2月29日 GMT-5 22:23
Is topology optimization available for use in the "eigenfrequency" study with 5.2? I am not able to get it to work. Are there any such examples?
Is topology optimization available for use in the "eigenfrequency" study with 5.2? I am not able to get it to work. Are there any such examples?

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