转子系统的平稳／非平稳随机地震响应分析

应用虚拟激励法结合精细时程积分计算了转子系统受平稳／非平稳随机地震激励的动力响应。采用虚拟激励分析将平稳随机激励转化为稳态简谐激励，将非平稳随机激励转化为瞬态确定性激励，即使对于非对称的油膜刚度阵和阻尼阵，算法仍然简单高效，并得到精确的结果。

Seismic analysis of rotor system under stationary nonstationary random earthquake excitations

In this paper, the pseudo excitation method and high precision direct integration scheme are used in the analysis of rotor bearing systems subjected to stationary non-stationary random earthquake excitations. By means of the pseudo excitation method, the stationary random excitations are transformed into harmonic excitations while the non-stationary random excitations are transformed into deterministic transient excitations. So that the analyses are greatly simplified. Even for asymmetric stiffness and damping matrices due to the fluid films, the algorithm proposed is simple, accurate and highly efficient.