통계 방법에 의한 비선형 진동계의 준선형화

Nonlinear dynamic system under random excitation was analyzed by using stochastic method. Linearization methods were used in order to linearize non-linear structural characteristics but the parametric excitation was used as it was given. Nonlinear vibration problems of 1 DOF and 2 DOF system were analyzed in this research. Analytical method and equivalent energy method were introduced and applied to example system. The result were compared with Monte Carlo simulation result. From the comparison the combination method of the above two method was derived and showed good results.