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Convergent uniform loading
Posted 2010年11月24日 GMT-5 03:31 1 Reply
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Hello,
I have large plate with variable thickness modelled in 3D. Along the entire extension of the plate I want to apply a uniform load, but the loading vectors will all be directed to a convergent point. How can I do this?
Thank you!
Ricardo Araujo
I have large plate with variable thickness modelled in 3D. Along the entire extension of the plate I want to apply a uniform load, but the loading vectors will all be directed to a convergent point. How can I do this?
Thank you!
Ricardo Araujo
1 Reply Last Post 2010年11月24日 GMT-5 08:31
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Posted:
1 decade ago
Hi
you mustt apply a vector expressed load then with 2-3 components (for 2D 3D respectively).
To write it out correctly you must think "COMSOL BC" that is the formula you write in the "GUI field" is applied onto any/all "element" of volume dxdydz located at x,y,z belonging to the boundary.
This is the "implicit" mathematical notation of COMSOL, and I have noticed very many users are not fully grasping this.
so select your boundary, define total load per unit area (respectively length for 2D) type in the vector formulas, Force *amplitude = based on the x,y,z coordinates (or any user defined CS you have set up) and divide by the total area. (Note like that you apply a mean pressure (Force/totalArea) that is a constant average valued scalar and your "amplitude function" is then givingthe vector orientation.
Have I made myself clear ? ;)
--
Good luck
Ivar
you mustt apply a vector expressed load then with 2-3 components (for 2D 3D respectively).
To write it out correctly you must think "COMSOL BC" that is the formula you write in the "GUI field" is applied onto any/all "element" of volume dxdydz located at x,y,z belonging to the boundary.
This is the "implicit" mathematical notation of COMSOL, and I have noticed very many users are not fully grasping this.
so select your boundary, define total load per unit area (respectively length for 2D) type in the vector formulas, Force *amplitude = based on the x,y,z coordinates (or any user defined CS you have set up) and divide by the total area. (Note like that you apply a mean pressure (Force/totalArea) that is a constant average valued scalar and your "amplitude function" is then givingthe vector orientation.
Have I made myself clear ? ;)
--
Good luck
Ivar