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Efficient uncoupled stochastic analysis with non-proportional damping

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Academic year: 2021

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Figure

Fig. 1. 2-DOF dynamical system.
Fig. 2. Relative error on (a) the covariance of the first modal coordinate and (b) on the covariance between both modal amplitudes
Fig. 6 shows the errors on the correlation coefficients obtained with the decoupling approximation (in this case, the correlation of modal coordinates just results from the correlation of generalized forces) and the proposed approximation.
Fig. 6. Differences between exact correlation matrix of modal coordinates q ðqÞ and approximations (a) q ðq d Þ and (b) q ðq c 2 Þ .
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