hello. I am a mechanical engineering student now learning finite element method and Abaqus.
I have searched on this forum, but I haven't found an answer for my problem.
I'd really appreciate any suggestion, idea or improvement by you about the following Abaqus analysis.
What I wanto to obtain:
Frequency Response Function (FRF) of a plate when I load a point in the structure and measure the displacement response at the loaded point. Hence, a graph like the one depicted below
What I did:
Steady State Dynamics (Modal), plot of the nodal displacement of interest vs frequency, absolute value of the displacement, logarithm of the absolute value divided by the absolute value of the applied force
Then, I have tried to plot generalised displacement, add all the generalised displacement plots
-the displacement plot is both positive and negative, therefore it is zero somewhere at resonances. As I take the logarithm the value goes to -infinity at resonances;
-in the sum of generalised plots I can no lenger see the antiresonances as Abaqus gives me generalised quantities only for whole model and not for the single point I need.
As I said, any idea or suggestion would be really appreciated.
Have a nice day,
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