(a) x direction

\(f^{sh}\)

Hz

\(\lbrace \texttt {takerand}\left( \left[ 1,2.75,4.5,6.25,8,9.75,11.5,13.25,15\right] \right) \)\(\cdot \left( \texttt {randn}(0,\sqrt{2})\right) \rbrace \)

\(\gamma ^{sh}\)

−

\(\lbrace \gamma ^{dof}_i \cdot \texttt {randn(0,1)} \rbrace \) with \(\gamma ^{dof}_i=\gamma ^{dof}(i)\) and \(\gamma ^{dof}=\left[ 0.13,0.25,0.38,0.50,0.63,0.75,0.88,1.00 \right] \) and i is the dof label

(b) z direction

\(f^{ax}\)

Hz

\(\lbrace \texttt {takerand}\left( \left[ 10,27.5,45,62.5,80,97.5,115,132.5,150\right] \right) \)\(\cdot \left( 2\texttt {randn(0,1)}\right) \rbrace \)

\(\gamma ^{ax}\)

−

\(\lbrace \texttt {randn(0,1)} \rbrace \)
