Forced response problem for a viscoelastic behavior law (MAT1 + MATVE)

[Rodolp21]

Hello everyone, I'm studying the forced response of a simple structure. To do this, I've defined a temporal excitation and I'm using a viscoelastic memory material (MATVE). By extracting the natural frequencies and comparing with a Matlab calculation, I obtain the same values. Unfortunately, the frequency response (after Fourier transform of the time response) of my structure does not match that obtained from a personal Matlab code in which I encoded the behavior law from the Nastran manual.


I leave my .bdf code at your disposal.

Thank you for your help,
Sincerely Erwan Le Courric