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How to simulate Mechanical modes with specified symmetries?

Posted 10 feb 2011, 12:11 GMT-5 Version 3.5a 1 Reply

Jiangjun Zheng
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Hi, All,

For a long beam, if the ends of the beam are fixed. We can get a lot of modes with different symmetris. How can we simulate only with some specified symmetris?

For example: the beam with length x=10um, thickness z=0.25um, width y=0.25um. Centered at the origin. both end are fixed. How can we simulate the modes with x-even symmetry: u(x)=u(-x), v....? Can we make it only by set symmetries in some internal boundaries? or by using some coupling variables? or ...


Thanks in advance.

Best,
Jzhj
1 Reply Last Post 11 feb 2011, 14:42 GMT-5
Jiangjun Zheng
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Posted: 1 decade ago 11 feb 2011, 14:42 GMT-5
It is solved. Before I am using the hole structure with internal boundaries as symmetry planes. However, this can generate more modes than expected. The solution is simply using only the small part with external boundaries as symmetry panes.
It is solved. Before I am using the hole structure with internal boundaries as symmetry planes. However, this can generate more modes than expected. The solution is simply using only the small part with external boundaries as symmetry panes.

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