Analysis of Dynamic Contact Characteristics of High-speed Train Transmission Gear Considering the Influence of Sliding between the Teeth

doi:10.3901/JME.2021.10.087

Abstract

Abstract: In order to study the influence of the inconsistent slip on the contact surface of high speed train transmission gear on the dynamic contact characteristics during the meshing process. The bogie transmission gear of CRH3 EMU was taken as the research object. Based on the gear contact theory and gear tooth friction relationship, the time-varying EHL friction model considering tooth surface slip, dynamic viscosity and load was introduced. The dynamic analysis of transmission gear under low speed and heavy load condition is carried out by the implicit integration scheme provided by ABAQUS/Standard. By comparing the simulation results under the condition of frictionless, constant friction coefficient and variable friction coefficient, the influence of the tooth surface slip and the friction coefficient on the dynamic contact characteristics of gears were analyzed. The results showed that the inconsistency of friction coefficient of surface meshing nodes is inconsistent, had little effect on the maximum value and distribution of contact force, contact area, Mises, contact stress; When considering the influence of slip in the meshing process, the tooth surface friction fluctuates more gently, and the mean value of friction increases by 40% compared with the normal friction; The distribution of frictional shear stress is closer to the actual situation than that of constant friction. The increase of constant friction coefficient has little influence on the stress distribution, but it will increase the stress contact surface correspondingly and aggravate the periodic vibration of the system.

Key words: high-speed train, gear transmission, finite element method(FEM), variable friction coefficient, sliding ratio, contact characteristics

CLC Number:

U270

XIAO Qian, WANG Danhong, CHEN Daoyun, ZHU Haiyan. Analysis of Dynamic Contact Characteristics of High-speed Train Transmission Gear Considering the Influence of Sliding between the Teeth[J]. Journal of Mechanical Engineering, 2021, 57(10): 87-94.

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