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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...

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...

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

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!!!