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Regarding terms in eigenfrequency equation
Posted 27 mai 2011, 09:19 UTC−4 Structural Mechanics Version 4.1 1 Reply
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Dear sir,
I am using eigenfrequency analysis of Solid Mechanics module for my micro-damper (COMSOL Multiphysics version 4.1). The solver executes the equation which is written in attached file (I was unable to type the same equation here so it is attached as docx file).
In this equation, F and v stands for what, I do not know.
Kindly let me know.
Thank you.
Best regards,
Rajeev Kumar Singh
I am using eigenfrequency analysis of Solid Mechanics module for my micro-damper (COMSOL Multiphysics version 4.1). The solver executes the equation which is written in attached file (I was unable to type the same equation here so it is attached as docx file).
In this equation, F and v stands for what, I do not know.
Kindly let me know.
Thank you.
Best regards,
Rajeev Kumar Singh
Attachments:
1 Reply Last Post 30 mai 2011, 02:22 UTC−4
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Posted:
1 decade ago
Hi
first I believe you are missing the "u" (in bold, as it's a vector, the dependent variables solved for in structural), and I believe it's a vector "Fv" and not a "dot product".
Second to show equations here on the forum, you can also use "snipp-it" or a similar tool to upload them as ".png" or ".jpg" files.
Then I propose that you take a look at the theory, it has come back again in the doc v4.1, even more in details with all the new structural goodies in V4.2. You can also turn on the equation view to understand what COMSOL is doing on it's internal
the Vector F are the generally the "external" force/flux applied on the system. Do not forget that the formulas shown by COMSOL are those applied to the infinitesimal dx*dy*dz element volume, hence to get to our usual units these must be integrated over the domains.
--
Good luck
Ivar
first I believe you are missing the "u" (in bold, as it's a vector, the dependent variables solved for in structural), and I believe it's a vector "Fv" and not a "dot product".
Second to show equations here on the forum, you can also use "snipp-it" or a similar tool to upload them as ".png" or ".jpg" files.
Then I propose that you take a look at the theory, it has come back again in the doc v4.1, even more in details with all the new structural goodies in V4.2. You can also turn on the equation view to understand what COMSOL is doing on it's internal
the Vector F are the generally the "external" force/flux applied on the system. Do not forget that the formulas shown by COMSOL are those applied to the infinitesimal dx*dy*dz element volume, hence to get to our usual units these must be integrated over the domains.
--
Good luck
Ivar