Recent content by Torus86

Hi, I'm using Nastran and Femap as post-processor to do a modal frequency response of a plate. I would ask if someone could help me and suggest if I'm writing the right commands for excitation force. The plate is 3m x 1.7m thick 0.01m and the excitation force is sinusoidal and has an amplitude...

Dear armadhuin, i know this. And I've already done it. The problem is how to convert the results from pch files (file punch) to excel or dat file to read them in matlab.. Thank you for the replie....

Hi,I'm encountering a problem. I'm studying a paper in which a dissipation-free plate is considered.There is a viscous damper and the damping rate is 100 Ns/m.Now there is the problem, because suddenly the author considers the impedance of the damper.My question is: are the impedance of the...

Hi, I'm encountering a problem. I'm studying a paper in which a dissipation-free plate is considered. There is a viscous damper and the damping rate is 100 Ns/m. Now there is the problem, because suddenly the author considers the impedance of the damper. My question is: are the impedance of the...

Hi, I'm asking punch output file for determine displacements (at the nodes) and forces (at the centroids) in a plate model. Now I have been able to convert punch file in excel file for the displacements but in the case of the forces I couldn't do it. I'm considering real and imaginary values of...

Nono it is Structural intensity yhat is the power flow per unit cross-sectional area in elastic media and it is analogous to acoustic intensity in a fluid medium due to structural vibration. I have to compute internal forces and displacements using modal superposition.

Hello, is there anybody that is studying structural intensity on a plate? Thank you very much!!!

Dear Greg I found my mistake... Thank you...

For example my first natural freq (in Hz) is 8.4 and the right one is 11.28 Hz I determined natural frequencies using matlab and I found the same values I have in the article that I'm studying. I think that I made some mistakes in the FE model but I didn't realize where yet..

Hi, I've done a nastran model of a simply supported plate that is identical to another model (same material, geometry and constraints). I've performed modal analysis, but I found other values of frequencies. Could someone help me to understand why? Thank you very much!!!