Abstract：In order to study the seismic early warning threshold of the high-speed railway under earthquake action, vibration table tests on a quasi-static full-size vehicle-track model was carried out.First, a sinusoidal seismic wave was applied to the vehicle track model.The test results show that in the “railway vehicle dynamic performance evaluation and test identification specification”， the specified wheel load reduction rate limit and derailment coefficient limit could be conservative, and the train derailment is due to the large horizontal vibration of the track structure caused by the earthquake, which makes the wheel sway horizontally, and leads the vehicle to the lateral rolling motion.Then, a measured seismic wave was applied to the vehicle track model.The test results show that the seismic wave spectral characteristics have a certain influence on the train running safety.After that, measured horizontal and vertical seismic waves were applied to the vehicle track model simultaneously, and it is found that the dynamic responses of the vehicle track system were more affected by the horizontal dynamic seismic wave then the vertical seismic wave.Finally, corresponding to the vibration table test model, a multi-rigid, multi-degree-of-freedom three-dimensional vehicle-track numerical model was established.Taking into account the track irregularity, the influence of vehicle speed on dynamic responses of the vehicle track was analyzed.The data analysis shows that within a certain range, the derailment of trains under earthquake action has little correlation with the train speed, which provides a theoretical basis for the study of earthquake warning thresholds for high-speed railways.
李昊,张鸿儒,于仲洋,邱滟佳. 地震作用下车辆-轨道系统轮轨动态响应试验研究[J]. 振动与冲击, 2020, 39(2): 132-140.
LI Hao,ZHANG Hongru,YU Zhongyang,QIU Yanjia. Experimental study on the dynamic responses of a vehicle-track system under earthquake. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(2): 132-140.
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