Dynamic Response Analysis Of Rotor-bearing System Under Random Earthquake Excitations

In this paper, the stochastic seismic responses of rotor-bearing system are investigated by means of pseudo excitation method (PEM) and precise time- integration method (PTIM). The main work of the paper is: 1. The seismic response of rotor-bearing system subjected to single-source multi-point single-phase stationary/non-stationary stochastic seismic excitations are analyzed. In the analysis, PEM and PTIM are used. The excitation spectrum can be ideal white noise, colored white noise, or any given power spectral density function. 2. The seismic response of rotor-bearing system subjected to single-source multi-point different-phase stationary/non-stationary stochastic seismic excitations are discussed. The wave passage effect model is applied to solve the problem of different phases resulting in the spatial variations of the ground motion precisely. PEM and PTJM are also used to get precise results. 3. The double-random problems of rotor-bearing system are analyzed by means of PEM. The stationary stochastic seismic response of rotor-bearing system when the parameters of the system vary is investigated. Comparisons are made between the PEM and numeric simulation, and the results are satisfying.