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How to displace each meshed nodes in Comsol with different displacement values?
Posted 2019年5月30日 GMT-4 05:31 Structural & Acoustics, Geometry, Mesh Version 5.4 1 Reply
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Hi,
I have a displacement and stress output of a stiffened panel solid model from other FEM package (Ab..q..s) . It is not possible to generate this model geometry in Comsol alone due to sophisticated boundary condition, sub modelling feature and fabrication initial imperfection.
I would like to export these solid meshes to comsol, then displace all the nodes to the same value as displacement outputs I got from the other FE package, so that I will get the same strees profile. I need these stresses value in all nodes to couple with other physics in Comsol.
Please do you know how to displace each mesh nodes to the same value as displacement outputs I got from other FE package in comsol? Is Comsol capable on doing this?
Your answer is very appreciated. Thank you.
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Hi,
You can use an interpolation function, where you use each node's coordinates as the (x,y,z) columns. The interpolation function is then referenced from a Prescribed Displacements node.
However, it may still be easier to do the entire analysis in COMSOL. The things that you mention do not seem like they should be blockers.
- Sophisticated BCs should be easier in COMSOL
- Submodelling should be equally easy in COMSOL
- Modelling the initial imperfection is probably trickier, but not impossible. How to do it is however not clear, that would depends on how they are specified. If it is nodewise values, you will have the same kind of issue as in your original question.
Regards,
Henrik
Henrik Sönnerlind
COMSOL