Design of traction transformer of high speed train suspending parameter based on geometry filtering effect

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (2) : 259-264.

HE Xiaolong1,2,ZHANG Limin2,LU Liantao2,LUO Tianhong1

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Abstract

A new method based on geometry filtering effect has been put forward to obtain optimal suspension parameter in this paper.First,the vehicle-equipment system model is established,and the power spectral density function is derived.Then,the excitation mechanism of track irregularity on the vehicle-equipment vibration is analyzed based on FRF and PSD.At last,the suspension frequency of traction transformer is designed considering geometry filtering effect.The result shows that vehicle can easily occur forced vibration because of large incentive energy during low frequency range.The higher order vertical bending mode of vehicle produces small amplitude at higher vertical bending frequency due to filtering effect or low incentive energy at two typical speeds.The traction transformer suspension frequency is determined 9.8 Hz based on geometric filtering effect considering the design of a 250 km/h high-speed train.This method can reduce the vehicle vibration effectively,and provide guidance basis for traction transformer designing underfloor.

Key words

Vehicle-equipment coupling system / filtering effect / suspended equipment / suspending parameter design / elastic vibration

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HE Xiaolong1,2,ZHANG Limin2,LU Liantao2,LUO Tianhong1. Design of traction transformer of high speed train suspending parameter based on geometry filtering effect[J]. Journal of Vibration and Shock, 2019, 38(2): 259-264

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