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How to simulate Rotating Membrane in COMSOL?
Posted 2 nov 2020, 06:58 GMT-5 Structural & Acoustics, Acoustics & Vibrations, Structural Mechanics 2 Replies
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Hello, I wish to model a membrane (picture attached), that is mounted on a rotor at its center. Initially, there is no load except gravity, then we start rotating using the rotor. A sweep of the rotation rpm has to be done in order to evaluate its behavior. The issues that I am facing, 1. Membrane element must have tension for COMSOL to even start the simulation. There is no way I can say, the membrane has only gravity and centrifugal effects. Then, how do I perform it? Do I apply a very low value of Initial in-plane force? Or do I need to apply an initial strain, if so how much? 2. While trying to do a sweep of the Rotor rpm while making a time-dependent analysis? Thank you in advance.
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Dear Paul,
Normally the pretension should be set for COMSOL membrane physics. This is unavoidable, if you know the natural frequency of your membrane, you can empirically derive the in-plane tension of your membrane.
Kind regards, TY
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Thank you. I defined the Tension as a function of the Spatial coordinates and it seems to work.