Study on Traction Rod Load Characteristics of High Speed Train

doi:10.3901/JME.2020.08.200

Abstract

Abstract: A load sensor for traction rod is fabricated by quasi-static load calibration method, which is installed on a certain type of high-speed electronic mutil unit(EMU) for line load test. The load time history and load variation characteristics under typical working conditions such as traction during starting, straight line with high and low speed, entry and exit ramp, and braking for stopping are obtained. On this basis, the load spectrum of traction rods at different speed levels are compiled. Based on the linear cumulative damage criterion, the distribution of fatigue damage and the influence of train speed on fatigue damage are analyzed. The results show that, compared with the traction rod load of the trailer bogie, the load amplitude of the traction rod of the motor bogie is greatly affected by the motor torque load, especially in the starting and braking stages of the train, and the trend load changes obviously. With the increase of train speed, the load amplitude of traction rod increases continuously. It is obtained that the main vibration frequency of traction rod load is proportional to the train speed. Relative fatigue damage is defined to represent the contribution of every load grade to fatigue damage. The corresponding relationship between structural fatigue damage and load amplitude of traction rod, and the influence of train speed on cumulative fatigue damage of structure are obtained. The cumulative fatigue damage of the motor bogie traction rod load on structure reaches its smallest value when the train speed is 280 km/h. However, the cumulative fatigue damage value of the trailer bogie traction rod load on structure increases with the train speed. The research results have certain significance for the optimization design of high-speed train bogie and related theoretical research.

Key words: high-speed EMU, traction rod, load characteristics, load spectrum, fatigue damage

CLC Number:

U270

YANG Guangxue, LI Guangquan, ZHOU Junfeng, FENG Yonghua. Study on Traction Rod Load Characteristics of High Speed Train[J]. Journal of Mechanical Engineering, 2020, 56(8): 200-206.

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