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custom constraints in 3D solid mechanics

Posted 02.09.2011, 02:53 GMT-4 Modeling Tools & Definitions, Parameters, Variables, & Functions, Structural Mechanics Version 4.2 1 Reply

Steven Wang
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I want to simulate some eigenmode in 3D solid mechanics but I want to add some constraints in the physics. For example I want to make sure the displacement of the mode that I am simulating is only in z-direction (there is no displacement in x,y-directions). To put it more accurately it is in cylindrial coordinates and the displacement is only in polar direction. How can I do that in comsol? Can anybody give a hint?
1 Reply Last Post 02.09.2011, 15:15 GMT-4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 02.09.2011, 15:15 GMT-4
Hi

one way is to use aprescribed displacement BC and just define x,y = 0 and leave Z free, or in 2D axi r=0 and leave again z free

Another way is to leave the modes appear and sort the one related to "z"

But adding BCs mean that you are altering the model w.r.t. a free free case

--
Good luck
Ivar
Hi one way is to use aprescribed displacement BC and just define x,y = 0 and leave Z free, or in 2D axi r=0 and leave again z free Another way is to leave the modes appear and sort the one related to "z" But adding BCs mean that you are altering the model w.r.t. a free free case -- Good luck Ivar

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