how to add attenuation in a transient acoustic pressure analysis
Hi everyone, The transient acoustic pressure study does not take into account wave attenuation when traveling accross a material (i.e. there is no lineal elastic with attenuation study option as the...
View ArticleComplex Band Strucutre - Acoustics/Structural Mechanics
Hi In a typical phononic band structure calculation done within COMSOL the procedure is to define Floquet BC's and do a parametric sweep of the wave vector over a particular direction in the...
View Articlesqueeze film damping coefficient computing
Dear All, actually i saw your paper about squeez fim damping simulation in comsol and i have a question : I simultate the squeeze film daming under my membrane, evrything is work fine and i get the...
View ArticleExpress objective function in Optimization study of Frequency domain in...
Hi, I want to run an optimization study in frequency domain. I have experimental values of the variable alpha for specific frequencies and I want to adjust my control variable R in order to match these...
View ArticleHOW TO GIVE AN ACOUSTIC WAVE TO A PIEZOELECTRIC MATERIAL
I WANT TO GIVE AN ACOUSTIC WAVE OR A SOUND WAVE TO A PIEZOELECTRIC MATERIAL TO STUDY THE DIRECT EFFECT OF PIEZOELECTRIC MATERIAL.PLEASE HELP ME OUT.
View ArticleFrequency response on reduced modal basis
Hi all, I am trying to use the modal basis of a very simple acoustic 3D problem for a frequency sweep (room acoustics). First, entirely in Comsol, and second, by exporting the reduced modal system...
View Articlethin film capacitor
hello i have a capacitor structure ( Electrode -thin film ferroelectric-electrode) but i have a problem when i compute the design its gives me error : "Failed to find a solution. The relative error...
View ArticleFBAR CENTER FREQUENCY
HOW TO FIND THE FREQUENCY AROUND WHICH WE GET THE RESULT IN FBAR STRUCTURE.
View Articlephase velocity and group velocity of Lamb Waves
Hi Everyone, I made a cylindrical model surrounded by liquid model made of water, this model want simulate a part of carotid in the human neck. I set the liquid and solid domains about all the geometry...
View ArticleCoupling AC/DC Joule Heating and Thermoacoustics
Is it possible to couple the AC/DC and Thermoacoustics module, such that an alternating current causes a change in temperature, which then causes a change in pressure? I can couple the AC/DC module...
View Articleeffect of pml thickness and meshing in acoustics-structural module
Hi everyone, I am trying to simulate the frequency response of a thin membrane using acoustic-structural interaction module.The issue is with meshing of all domains and the pml thickness levels. For my...
View ArticleEigenfrequency analysis in Acoustics Module
Hei, I am performing an eigenfrequency analysis on a simple energy harvester to find the Q factor. I am able to perform the analysis but the problem is that the mode shape looked like what I was...
View Articlesymmetry conditions
Hey All, I am trying to simulate a vibrating membrane.The membrane is a square so i am trying to use symmetry and solve it.I could apply symmetry to the membrane but cant do it for the sphere or air...
View ArticleQuestion about displacement amplitude, displacement RMS, displacement field...
Dear colleagues, I would be grateful if you could somehow help me! I work with Acoustic module in Acoustic-Solid interation Frequency Domain. I would like to get frequency responses of simple bodies...
View Articlematerial property
please anyone help me to obtain the properties of PVDF material which can be used as piezoelectric.. i want elastic matrix and coupling matrix (stress-charge form)
View ArticleSnow medium/material
Is snow material available in COMSOL library? If not, how can I generate the same.
View ArticleHelp needed with model to find acoustic transmission loss of a membrane.
I've been trying to 2 weeks now to get this model working with no joy so far. It's a membrane with a mass attached to the centre. I have YM, PR & density for membrane & mass. I need to...
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