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Seeking info on method(s) to establish random interface acceleration PSD

Seeking info on method(s) to establish random interface acceleration PSD

(OP)
To all

Looking for advice and/or info on the “best” method to establish an "equivalent" interface random profile for a 2/3 party user: sub-contractor, test house, etc

Let's a say you have global FEM with 2 parts (A & B). Attachment between the 2 parts is done via multiples springs. The GFEM is subjected to some random profile. One wants to provide a "equivalent" random (test) profile so that part B can be tested, analysed in detail i.e. as a sub-assy.

What would be the best way of coming up with a realistic PSD profile at the interface?

Thanks
Regards

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