Analysis of Rotor Vibration Excited by Seismic Wave
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概要
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This paper deals with rotor vibration caused by seismic wave, the influence of gyroscopic force on the response and an aseismic design method using a stopper with clearance. An analysis is presented for calculation of the response of a general flexible rotor excited by an arbirtary external force such as seismic wave. Modal techniques and step by step numerical integration are employed. The calculation method is applied to a rotor with a strong gyroscopic force. The computational results of a harmonic excitation indicate that there exist two resonance frequencies corresponding to forward and backward whirl motions. The numerical history response indicates that even non-circular one-directional stopper is sufficient for aseismic design to keep the clearance induced vibration small. A pump rotor is chosen to demonstrate the seismic resonance of a rotor with a weak gyroscopic force. Then the pump rotor dynamics become very similar to structural dynamics. but the clearance induced vibration of pump rotor exhibits a whirl orbit motion which characterizes the rotor dynamics.
- 一般社団法人日本機械学会の論文
著者
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Kikuchi Katsuaki
Mechanical Engineering Research Laboratory Hitachi Ltd.
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Matsushita Osami
Mechanical Engineering Research Laboratory Hitachi Ltd.
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Takagi Michiyuki
Mechanical Engineering Research Laboratory, Hitachi Ltd.
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Takagi Michiyuki
Mechanical Engineering Research Laboratory Hitachi Ltd.
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