Dynamic characteristics of an underframe inerter-based suspended equipment for high speed trains

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (2) : 246-254.

WANG Yong1, LI Haoxuan1, JIANG Wen’an2, WANG Ruochen1, LI Yong1

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Abstract

The lightweight design criterion and power decentralized traction were used in high speed train, the lightweight design led to increased elastic vibration of the car body and the power decentralized traction installed suspended equipment under the car body, which caused the coupled vibration between the car body and equipment. The inerter was applied in a underframe suspended equipment for high speed train, a novel suspended equipment vibration suppression system was designed, the rigid-flexible coupling vertical dynamic model of the car body and underframe inerter-based suspended equipment was established. The structural parameters of the underframe inerter-based suspended equipment were optimized using the genetic algorithm, the dynamic response of the system was obtained using the virtual excitation method and fast stability algorithm, the dynamic characteristics of the system was evaluated by the Sperling index and compared with the counterpart of the traditional suspended equipment. The results showed that compared with traditional suspended equipment, the inerter-based suspended equipment could effectively suppress the vibration of the car body and improve the dynamic performance.

Key words

high speed train / inerter / suspended equipment / parameter optimization / dynamic characteristics

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WANG Yong1, LI Haoxuan1, JIANG Wen’an2, WANG Ruochen1, LI Yong1. Dynamic characteristics of an underframe inerter-based suspended equipment for high speed trains[J]. Journal of Vibration and Shock, 2022, 41(2): 246-254

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