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Frequency response and contact mode of resonators
Posted Jul 3, 2015, 4:25 a.m. EDT MEMS & Nanotechnology, Acoustics & Vibrations, MEMS & Piezoelectric Devices, Structural Mechanics Version 5.0 1 Reply
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I am using COMSOL since 3.5a version and I am using version 5 of it and simulating the 2D axisymmetric and 3D CMUT device loaded with water tank using Electromechanics module and Acoustics module. Why the frequency response of COMSOL simulation shows much more narrower bandwidth in Comparison with other FEM software package like ANSYS. (I am using PML in COMSOL) I also tried to use Thermoacoustic module and still it shows narrower Bandwidth.
Also I am trying to simulate the collapse-mode where membrane touches the substrate. I have tried to use the contact-pair for stationary analysis and since I am applying the voltage to bend, it is not converging. I understand that since the mesh size in gap when membrane collapses is going to be zero, so there is a numerically error there. I also studied the rf-mems-switch example in the model library and also tried to apply the same method and do the transient analysis however I couldn't manage to converge the problem.
Any suggestion is more than welcome.
Also I am trying to simulate the collapse-mode where membrane touches the substrate. I have tried to use the contact-pair for stationary analysis and since I am applying the voltage to bend, it is not converging. I understand that since the mesh size in gap when membrane collapses is going to be zero, so there is a numerically error there. I also studied the rf-mems-switch example in the model library and also tried to apply the same method and do the transient analysis however I couldn't manage to converge the problem.
Any suggestion is more than welcome.
1 Reply Last Post Jul 21, 2015, 5:46 a.m. EDT
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Posted:
9 years ago
Is there any solution or suggestion?