The Lanzhou-Xinjiang High-speed Railway runs through a region of over 500km that is amenable to frequent winds. The strong wind and rainfall pose a great threat to the safe operation of high-speed trains. To tackle the aforementioned climate challenges, this paper investigates the dynamic response of the high-speed train-track-bridge coupling system under the simultaneous action of winds and rains for the safe operation of trains. Specifically, there are four main objectives: (1) to develop a finite element model to analyze the dynamic response of the train-track-bridge system in windy and raining conditions; (2) to investigate the aerodynamic loads posed to the train-track-bridge system by winds and rains; (3) to evaluate the effects of wind speed and rainfall intensity on the train-track-bridge system; and (4) to assess the safety of trains at different train speeds and under various wind-rain conditions. To this end, this paper first establishes a train-track-bridge model via ANSYS and SIMPACK co-simulation and the aerodynamics models of the high-speed train and bridge through FLUENT to form a safety analysis system for high-speed trains running on the bridge under the wind-rain conditions. Then, the response of the train-track-bridge system under different wind speeds and rainfall intensities is studied. The results show that the effects of winds and rains are coupled. The rule of variation for the train dynamic response with respect to various wind and rain conditions is established, with practical suggestions provided for control of the safe operation of high-speed trains.

中文翻译：

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风雨同时作用下高速列车-轨道-桥梁耦合系统的动力响应

兰新高铁贯穿500多个地区公里，可以承受频繁的风。强风强降雨对高铁安全运行构成极大威胁。为应对上述气候挑战，本文研究了高速列车-轨道-桥梁耦合系统在风雨同时作用下的动态响应，以确保列车安全运行。具体而言，有四个主要目标： (1) 开发有限元模型来分析列车-轨道-桥梁系统在风雨条件下的动力响应；(2) 研究风雨对列车-轨道-桥梁系统造成的空气动力载荷；(3) 评估风速和降雨强度对列车-轨道-桥梁系统的影响；(4) 评估列车在不同车速和不同风雨条件下的安全性。为此，本文首先通过ANSYS和SIMPACK联合仿真建立了列车-轨道-桥梁模型，并通过FLUENT建立了高速列车和桥梁的空气动力学模型，形成了高速列车在风下在桥梁上运行的安全分析系统。 - 下雨条件。然后，研究了列车-轨道-桥梁系统在不同风速和降雨强度下的响应。结果表明，风和雨的影响是耦合的。建立了列车动态响应在各种风雨条件下的变化规律，为控制高速列车的安全运行提供了切实可行的建议。