Abstract：The risk of trains being hit by tornadoes continues to increase due to the increased rail network density and the increased occurrence probability of tornadoes. A series of pressure measurement tests on a train in a tornado was performed using a tornado vortex simulator, in order to evaluate the operation safety of high-speed train in a tornado. The results show that with the joint actions of tornado pressure drop and horizontal wind speed, the wind load acting mechanism shall be significantly different for different positions (or radial distances) of the train model relative to the tornado. The wheel-rail lateral force at the windward side is mainly generated by the side force, and with the increase of wind speed, the contribution of lift force and rolling moment to the wheel-rail vertical force increases. The safety indicators of train operation such as transverse force, derailment coefficient and wheel load reduction rate firstly increase and then decrease with the radial distance. The train safety operation indicators increase with the wind speed and train speed, the critical wind speed of tornado for safe train operation decreases sharply with the increase of train speed, and when the train speed is 350 km/h, the critical wind speed is only 11.06 m/s.
李若琦 李波 杨庆山 田玉基 韩晓宇. 龙卷风作用下高速列车的运行安全性评估[J]. 土木工程学报, 2021, 54(12): 12-20.
Li Ruoqi Li Bo Yang Qingshan Tian Yuji Han Xiaoyu. Evaluation of the safety of high-speed trains in a tornado. 土木工程学报, 2021, 54(12): 12-20.
