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Restricting solutions to not vary in one or more directions
Posted Oct 8, 2013, 10:19 p.m. EDT Structural Mechanics Version 3.5a, Version 4.2 1 Reply
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I would like to perform a 1D eigenfrequency stress simulation of a horn using the Structural Mechanics module. In my Comsol package, there is no 1D Structural Mechanics module; there is only 2D and 3D. In 2D (or 3D), is there a way to perform a 1D simulation by restricting the displacement solution to be a function of only one direction, say the z-direction? I do not want the displacement solution to vary in x- and y-directions. This is different from prescribing the displacement in the x- and y-directions to be zero.
Any pointers as to how to start setting this up in either Comsol 3.5a or 4.2 (Windows platform) would be appreciated. Thanks.
Any pointers as to how to start setting this up in either Comsol 3.5a or 4.2 (Windows platform) would be appreciated. Thanks.
1 Reply Last Post Oct 9, 2013, 8:49 a.m. EDT
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Posted:
1 decade ago
Hi,
Make sure you have "Advanced Physics Options" item selected (in Model Builder, the icon with the eye).
Then you can (on Solid Mechanics node, right click) add a "Pointwise Constraint" node (in first group, corresponding to domain equations, select "More").
Inside the "Pointwise Constraint" settings, write something like "d(u,X)" in the "Constraint expression" field. This one means that you want variable "u" (x-component of displacement field) be independent of X-coordinate.
Regards,
Jesus.
Make sure you have "Advanced Physics Options" item selected (in Model Builder, the icon with the eye).
Then you can (on Solid Mechanics node, right click) add a "Pointwise Constraint" node (in first group, corresponding to domain equations, select "More").
Inside the "Pointwise Constraint" settings, write something like "d(u,X)" in the "Constraint expression" field. This one means that you want variable "u" (x-component of displacement field) be independent of X-coordinate.
Regards,
Jesus.