A hybrid approach for the time domain analysis of linear stochastic structures
We proposed a hybrid method for linear stochastic dynamic structures. A reduced stochastic model of the finite element model is developed. The second order estimations of the mean and covariance matrices are obtained. The results of the proposed method do not contain the secular terms. The proposed method is quite suitable for the case of low levels of uncertainties.
time domain analysis secular terms stochastic finite element method uncertain structures modal approach perturbation