In random vibration analysis, the load is given as a PSD (power spectral density). The values are often $G^2/Hz$, but I have an example where the PSD is a pressure $Pa^2/Hz$. The value is written as $(100 N/m^2)^2/Hz$ which brings me to these questions:
- Is that value $(100 \;N/m^2)^2/Hz$ equal to $10000 \;(N/m^2)^2/Hz$? (The results of the analysis imply that the answer is Yes, but I want to confirm my understanding.)
- Are both styles of writing the value acceptable? Is one style more common or acceptable than the other? For example, I have never seen an acceleration PSD written as $(5 \;G)^2/Hz$ to represent a value of $25 \;G^2/Hz$.