Durability and Reliability Evaluation of Chute on the Floor of High-speed Train  
Author Wenxue Qian


Co-Author(s) Yankai Yuan; Xiaowei Yin; Liyang Xie; Hoang Pham


Abstract With the rapid development and the universal promotion of lightweight body design technology, floor chute fatigue performance gradually become the focus, and the key of evaluating the performance is obtaining real load and accurately evaluating the strength. Through the full test of the actual condition of the high-speed train line, the dynamic load generated by the random vibration of the vehicle body due to the track excitation is obtained, and the car chassis floor of the vehicle body is directly taken as the structural sample to test the fatigue limit during the test of floor slide fatigue. Based on the fatigue test data, the P-S-N curve of floor chute structure with a small sample size was made according to the principle of sample information aggregation. Then with fatigue cumulative damage theory, evaluating the fatigue durability of the floor chute suspension structure under the real dynamic load. At the same time, using the statistic model to establish the reliability analysis model of the floor chute with more hanging points and more equipment, and analyzing the system reliability of the car floor slide hanger equipment. The results show that the evaluation value of the system reliability is 0.86, and the fatigue life is significantly higher than design.


Keywords Random vibration, Accumulated damage, Fatigue durability, Failure correlation, Fatigue reliability
    Article #:  24278
Proceedings ISSAT International Conference on Reliability and Quality in Design 2018
August 2-4, 2018 - Toronto, Ontario, Canada