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About 3D very thin geometry meshing problem
Posted Apr 27, 2014, 1:18 p.m. EDT Structural Mechanics Version 4.4 1 Reply
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I have just wanted to see the thin membrane free vibration in COMSOL 4.4. I have tried to use Solid Mechnics module and Membrane module . I think I have set the physics properly, then meshed , I think the meshing is also ok because no error there , it gives me good mesh. However, as I give compute order then it gives me the ' Singular Matrix ' error . it says there are some number of void equation .
It seems I did not have good quality of meshing for this thin geometry.
I have read ' Membrane Vibration ' module in the Module Library. But I did not solved this ' singular matrix ' error. I have attached the file , I hope someone could give me hints or suggestion.
thank you
Abdu
It seems I did not have good quality of meshing for this thin geometry.
I have read ' Membrane Vibration ' module in the Module Library. But I did not solved this ' singular matrix ' error. I have attached the file , I hope someone could give me hints or suggestion.
thank you
Abdu
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1 Reply Last Post Apr 28, 2014, 2:23 a.m. EDT
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Posted:
1 decade ago
Hi,
A membrane model without pre-stress is always singular. In the initial configuration there is only in-plane stiffness.
Regards,
Henrik
A membrane model without pre-stress is always singular. In the initial configuration there is only in-plane stiffness.
Regards,
Henrik