2D plane strain mode vs. 2D axial symmetry stress-strain mode
I am relatively new to structural mechanics and am trying to explore the various application modes of the structural mechanics module. I have used the 2D plane strain mode to obtain the eigen...
View ArticleMEMS Piezoelectric (Voltage vs. Eigenfreq)
Hi, I am changing the voltage across the piezoelectric beam actuator I've created. I expect to see a different set of eigenfrequency numbers when I change the voltage. However, the numbers remain the...
View ArticleFSI and Damped Eigenfrequency Analysis (Comsol v4.0a)
Hi to all, I'm trying to solve some FSI models which correctly ran with version 3.5a. The models calculated the eigenfrequencies of a solid structure vibrating in a fluid environment. Thanks to the...
View Articleproblem with eigenfrequency
Hi all, My project consists in calculating the eigenfrequency of a piezoelectric beam. For the experience, I apply 10V on the top, the ground is on the bottom. After, I mesh the beam, I solve and I...
View ArticleEigenfrequency Analysis
Hi everyone, I've been trying to do vibration analysis but keep running into an error that says: The following feature has encountered a problem: -Feature: Compile Equations: Eigenfrequency (sol1/st1)...
View ArticleEigenfrequency analysis on shells
I have been working in 3.5a for a few years now, but have recently started a new project and decided now was the time I should upgrade to 4.2a. In 3.5a, when I had a model of a coupled system of a...
View ArticleRelation Eigenvalue/Eigenfrequency problem
I am currently investigating two-dimensional dielectric cavities and their electromagnetic TM/TE eigenmodes. For these studies I use the "Electromagnetic Waves" module while only considering the...
View ArticleCONNECTION between 3-D eigenfrequency analysis & 2-D mode analysis
I use 3-D Eigenfrequency Analysis vs 2-D Mode Analysis to solve the eigenmodes in conventional ridge waveguides. Even though I have successfully got the expected results, there are still some problems...
View ArticleEigenfrequency Problem
Good evening, I'd like to know if there's a way to find the highest, maximum , eigerfrequency of a structure using COMSOL.
View ArticleEigenfrequency study with FSI interface in 4.3a
I attempted to use the FSI interface with the eigenfrequency study step using its default configuration under 'custom studies' in the model wizard. The study step indicates a warning, however, so I...
View ArticleCantilever Strain at Resonance Frequencies
Hello, I am new to Comsol and am trying to simulate strain in various structures at their eigenfrequencies. I have no problem finding the eigenfrequencies, but the amplitude in the eigenfrequency study...
View ArticleRelative Energy from Eigenfrequency Analysis
Hello All, I have been working with COMSOL 4.0 (mostly heat transfer modules) but now need to analyze a structure with an eigenfrequency analysis. I can generate the model and the eigenfrequency(s),...
View ArticleRigid connector as rotation sensor
Hello, I'm trying to use the rigid connector as an angle sensor, but I'm having troubles interpreting the values. In my case I have a 3D solid mechanics simulation of an object, and I apply a rigid...
View ArticleRigid-body Μodes
Hello guys. I am using Comsol more and more these days, so you will be hearing from me regularly from now on. I hope we'll have a nice chat. To the point now: In Eigenfrequency Analysis of a system, is...
View ArticleQuestion about complex frequencies
Hi! I'm simulating a MEMS resonator using Thermoelasticity and an eigenfrequency study. As might be expected, I'm obtaining complex frequencies due to the damping. I looked all over the forum and the...
View ArticleEigenfrequency Error "Cannot evaluate expression"
I am trying to compute the Eigenfrequency physics for a mesh I created and imported into COMSOL. The mesh is 3D, complex, and asymmetrical but I have had no problems computing with it in other studies....
View ArticleVelocity in Eigenfrequency Study
I trying to compute the eigenfrequecies and eigenmodes of a model. I have computed the Eigenfrequency study correctly. However, when I look at the generated values for the velocity (local RMS velocity,...
View ArticleVelocity in Eigenfrequency Study
I trying to compute the eigenfrequecies and eigenmodes of a model (material is water) in the pressure acoustics and frequency domain. I have computed the Eigenfrequency study correctly. However, when I...
View ArticleEigenfrequency with change in temperature
I have a gold beam fixed at both the ends. I would like to know the eigenfrequency(resonance frequency) of the beam with change in temperature(cooling the surroundings), please help me how to do that,...
View Articleeigenfrequency edit
Dear Sir I need some help, i am working on calculation of eigenfrequency for a disk. in comsol i can calculate 2D eigenfrequency without thickness consideration , if i use 3D simulation ,comsol...
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