Research on Dynamic Load and Stress of High-speed EMU Motor Hanger Considering Influence of Gear Transmission System

doi:10.3901/JME.2016.04.133

Abstract

Abstract: For welded structure of CRH3 High-speed EMU motor hanger, according to finite element method and rigid-flexible coupling multi-body dynamics, a rigid-flexible multi-body dynamics model considering gear transmission of high-speed train motor car is firstly established to simulate the dynamic load of motor hanger in acceleration and uniform speed operating conditions. And then the dynamic stress of dangerous node on motor hanger is calculated by using quasi-static stress method. By comparison of simulating result and online test result, the influence of gear transmission meshing vibration on dynamic load and stress is obtained. The result shows that under the influence of gear transmission meshing vibration, the dynamic load and stress of dangerous node on motor hanger have a significant increase, vertical vibration is intensified. Besides, the simulation result is closer to the experimental results. Therefore, in order to simulate structural vibration effects on the simulation results in dynamic stress simulation of High-speed train structure more accurately, based on considering the flexibility of the structure, the effects of meshing vibration of gear transmission system should be taken into account as well.

Key words: CRH3 EMU, dynamic stress, finite element method(FEM), gear transmission, motor hanger, rigid-flexible coupling MBD

CLC Number:

U270

ZHANG Li, REN Zunsong, SUN Shouguang, YANG Guang. Research on Dynamic Load and Stress of High-speed EMU Motor Hanger Considering Influence of Gear Transmission System[J]. Journal of Mechanical Engineering, 2016, 52(4): 133-140.

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