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Got a problem when doing parameterized geometry
Posted 21.04.2010, 11:17 GMT-4 3 Replies
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Hi all,
I'm trying to do a parameterized geometry (one boundary of the model is written as a wave like function), and I did a stationary analysis, after that I got the expected geometry I wanted.
The next step, in order to save the deformed geometry, I clicked "store solution" in "solver manager", actually I am not sure if it is the way to store the deformed mesh...and then added another application mode which is "piezo plane strain application mode", and I let the "solver manager" to use store solution to solve, and did the Eigenfrequency analysis, and now comes the weird parts:
1. Actually the "deformed mesh" Eigenfrequency is expected to be a big difference from the "undeformed mesh", but they are almost the same, I'm not sure if it came from the "store solution".
2. I wanted to see the total displacement of the surface plot, however the colorful surface plot disappeared, instead I only can see the geometry boundary in the post processing.
Could someone help me out? Thanks in advance.
I'm trying to do a parameterized geometry (one boundary of the model is written as a wave like function), and I did a stationary analysis, after that I got the expected geometry I wanted.
The next step, in order to save the deformed geometry, I clicked "store solution" in "solver manager", actually I am not sure if it is the way to store the deformed mesh...and then added another application mode which is "piezo plane strain application mode", and I let the "solver manager" to use store solution to solve, and did the Eigenfrequency analysis, and now comes the weird parts:
1. Actually the "deformed mesh" Eigenfrequency is expected to be a big difference from the "undeformed mesh", but they are almost the same, I'm not sure if it came from the "store solution".
2. I wanted to see the total displacement of the surface plot, however the colorful surface plot disappeared, instead I only can see the geometry boundary in the post processing.
Could someone help me out? Thanks in advance.
3 Replies Last Post 22.04.2010, 02:51 GMT-4
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Posted:
1 decade ago
Hi
"store solution" stores the results, not the mesh, in the sens that you can use it as a geometry. For that you must use the "mesh - create geometry from mesh"
try it out on a simple case first, to get used to all the settings and their effect
ANd then note that the dispalcement in eigenfrequency mode are relative and normalised in such a way that its only the frequency and the "shape" that has a relevant information, Comsol can say 12m deformation for a 1mm long part, as such it's nonses, but it's correct, that is not the absolute value but the shape, so you can qualitatively compare shapes but not their amplitudes.
hope this helps
Have fun Comsoling
Ivar
"store solution" stores the results, not the mesh, in the sens that you can use it as a geometry. For that you must use the "mesh - create geometry from mesh"
try it out on a simple case first, to get used to all the settings and their effect
ANd then note that the dispalcement in eigenfrequency mode are relative and normalised in such a way that its only the frequency and the "shape" that has a relevant information, Comsol can say 12m deformation for a 1mm long part, as such it's nonses, but it's correct, that is not the absolute value but the shape, so you can qualitatively compare shapes but not their amplitudes.
hope this helps
Have fun Comsoling
Ivar
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Posted:
1 decade ago
Ivar,
Thank you very much for your valuable reply. I am so appreciated that we newbies can always get help from an expert like you. Since COMSOLing is not really easy...
Thank you very much for your valuable reply. I am so appreciated that we newbies can always get help from an expert like you. Since COMSOLing is not really easy...
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Posted:
1 decade ago
Hi
well you know a few years ago I was in the same situation as you, but I hope there will be many others soon to give usefull responses (I learn a lot, at least in the beginning)
Have fun Comsoling
Ivar
well you know a few years ago I was in the same situation as you, but I hope there will be many others soon to give usefull responses (I learn a lot, at least in the beginning)
Have fun Comsoling
Ivar