Study on Vibration Behavior of Carbody and Suspended Equipment with Aerodynamic Loads

doi:10.3901/JME.2019.04.102

Abstract

Abstract: Based on the power spectral density function of Simiu wind, the autocorrelation model was established to calculate a fluctuating wins of a moving point shifting with high-speed trains, thus getting the random aerodynamic loads on high-speed carbody. Considering the carbody flexible vibration and multiple underframe suspended equipment, a rigid-flexible coupling vehicle system dynamics model was built to analysis the influence of aerodynamic loads on vibration behavior of carbody and suspended equipment under different wind speed. The results show that the effect of aerodynamic loads on carbody and suspended equipment vibration is significant. With the increase of vehicle running speed, the vibration of carbody and suspended equipment is intensified. However, carbody lateral vibration is not obvious when the running speed is less than 150 km/h. Reasonable underframe suspended parameters can effectively reduce the vibration of carbody and the equipment. When the wind speed is 5 m/s, the lateral vibration of carbody with 8 Hz suspended frequency is 26.5% lower than that with 1 Hz. The study considering the effect of aerodynamic loads can more realistically reflect the vibration behavior of the carbody and the equipment, which can provide reference value for carbody underframe suspended system with better performance.

Key words: aerodynamic loads, carbody vibration reduction, flexible carbody, parameter matching, suspended equipment

CLC Number:

U271

WANG Qunsheng, ZENG Jing, WEI Lai, DONG Hao, ZHENG Biao. Study on Vibration Behavior of Carbody and Suspended Equipment with Aerodynamic Loads[J]. Journal of Mechanical Engineering, 2019, 55(4): 102-108.

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