Hello, I was reviewing Solution S-070307 regarding random vibration analysis. But the answer seems wrong to me. When having fixed boundaries with a uniform base excitation of for example 1 g. The nodes adjacent to the base show relatively really low numbers of PSD g values. This is worst in the more rigid cases. Physically the more rigid a structure be the higher the resonance frequencies should be. Also the excitation energy should completely transfer throughout the structure. The only way I can explain the small values of g near the fixed geometries is to think of the plot values as differential values. Yet, by choosing a point exactly at the fixed point I get uniform 1 g ( not a relative value!). Can anyone help me with my problem?

Hello Leila,

Please have a look again at Solution Id: S-070307. I added an extra paragraph, a sample model and screen captures to better illustrate the explanation. I hope you will find the Solution more self explanatory.

If that was not the case, I would recommend you contact your SOLIDWORKS Value Added Reseller (VAR) for assistance. They will be able to explain anything remaining.