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With the pseudo-excitation method, the random response of a cantilever double-disc rotor system under the filtered Gaussian white noise earthquake ground accelerated random excitations is analyzed by computer numerical simulation. The results show that the random response is relatively strong during an earthquake of the horizontal direction. The cantilever disk vibration is the most strong. The inherent frequency of the site soil has a great effect on the random response on the horizontal direction, while the system frequency characteristics has a great effect on the random response of the vertical direction. The rotor imbalance random excitation intensity does not change the peak frequency of the response spectrum. The system random vibration response is large when the excitation intensity is in a high level state. It has a great impact on the low and high frequency of non-cantilever disc, the low frequency of the cantilever disc, the high- frequency of non-cantilever bearing vertical vibration and the high-frequency of cantilever bearing the intensity around the high-frequency random response.

Random Response of Rotor System on the Filtered Gaussian White Noise Earthquake Ground Acceleration