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Mass element
Posted Dec 18, 2009, 5:13 p.m. EST 1 Reply
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Hi,
I want to add an additional feature to an existing model that only adds mass and does not add a stiffness. An element that acts only like a mass element. Is this possible in Comsol? I have Comsol Multiphysics and the Acoustics module.
Thanks,
Mihir
I want to add an additional feature to an existing model that only adds mass and does not add a stiffness. An element that acts only like a mass element. Is this possible in Comsol? I have Comsol Multiphysics and the Acoustics module.
Thanks,
Mihir
1 Reply Last Post Dec 19, 2009, 4:13 p.m. EST
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Posted:
1 decade ago
Hi
from my knowledge there is nothing like a "mass element" in Comsol, as there is no need for it, if you want to add a mass somhere you add it in through the equations applied to some boundary conditions, all depends what you are looking for.
The only physics having ponctual mass items on nodes (points) is the beam modes in structural module, you can take a look how COMSOL is adding the formulas for its physics in there (if you have the module) or check the documentation.
Basically you should look up explict and dependent variables, the physics and see how the mass interacts (do not forget that for transient time adds in, and for eigenmodes or harmonics the frequency effect your physics formulation) and write this out on the node you charge your mass on.
hope it helps on the way
Good luck
Ivar
from my knowledge there is nothing like a "mass element" in Comsol, as there is no need for it, if you want to add a mass somhere you add it in through the equations applied to some boundary conditions, all depends what you are looking for.
The only physics having ponctual mass items on nodes (points) is the beam modes in structural module, you can take a look how COMSOL is adding the formulas for its physics in there (if you have the module) or check the documentation.
Basically you should look up explict and dependent variables, the physics and see how the mass interacts (do not forget that for transient time adds in, and for eigenmodes or harmonics the frequency effect your physics formulation) and write this out on the node you charge your mass on.
hope it helps on the way
Good luck
Ivar