高速列车侧风安全性研究

发布时间：2018-04-25 19:00

本文选题：高速列车 + 侧风　；参考：《西南交通大学》2015年硕士论文

【摘要】：随着列车速度的不断提高、车辆的轻量化发展,以及我国高铁运行区域的扩大,侧风下高速列车的运行安全性正受到前所未有的挑战。我国还没有建立完整的高速列车侧风安全评价体系,并且有兰新线这样的特殊运行环境,侧风的随机性和脉动性更加彰显。因此针对我国高速列车运用条件,进行高速列车侧风安全性研究具有十分重大的意义。为了对高速列车侧风安全性进行研究,本文建立了高速列车的头车非线性动力学精细模型和三种不同的风载模型。首先,考虑车体柔性、车下设备和各种非线性因素,建立了高速列车车辆动力学仿真模型。分别基于均匀风假设、风的瞬态效应以及风的随机性,建立了定常稳态风载、瞬态中国帽风载和非定常随机风载模型。并根据准静态理论和合成风速理论,将气动载荷作为外部激励加载到车辆动力学模型上。然后,通过动力学仿真计算,得到了四大安全性指标—脱轨系数、轮重减载率、倾覆系数和轮轴横向力,并根据这些安全性指标,研究了轨道激扰和曲线轨道对侧风运行安全性的影响。根据有关车辆动力学标准和规范,得到了安全指标限值下的临界风速,并根据临界风速,研究了适合用于评价高速列车侧风运行安全性的指标。通过与试验和仿真的对比分析,研究了兰新线脉动风的等效简化模型。根据车辆脱轨临界风速,分析了各种风载模型下根据安全性指标限速的安全裕量。通过计算不同风载模型下车辆的非线性临界速度,研究了三种风载模型对侧风下车辆蛇行运动稳定性的影响。研究了单向侧风对车轮偏磨的影响,以及车轮存在偏磨情况下的侧风安全性。通过计算不同风载模型下车辆轮廓控制点的偏移量,对比分析了三种风载模型和轨道激扰对侧风下车辆限界的影响,提出了限界计算适用的风载模型。
[Abstract]:With the increasing of train speed, the development of lightweight vehicles and the expansion of high-speed railway operation area in China, the safety of high-speed trains under crosswind is facing unprecedented challenges. There is no complete evaluation system of crosswind safety for high-speed trains in China, and there is a special operating environment such as Lanxin Line, so the randomness and pulsation of crosswind are more obvious. Therefore, it is of great significance to study the crosswind safety of high-speed trains in accordance with the operating conditions of high-speed trains in China. In order to study the crosswind safety of high speed train, the nonlinear dynamic fine model and three different wind load models of high speed train are established in this paper. Firstly, the vehicle dynamics simulation model of high speed train is established considering the flexibility of the car body, the equipment under the vehicle and various nonlinear factors. Based on the assumption of uniform wind, the transient effect of wind and the randomness of wind, the steady steady wind load, transient Chinese cap wind load and unsteady random wind load model are established. According to the quasi-static theory and the synthetic wind speed theory, the aerodynamic load is loaded into the vehicle dynamics model as external excitation. Then, through dynamic simulation, four safety indexes, such as derailment coefficient, wheel load reduction rate, overturn coefficient and lateral force of wheel shaft, are obtained, and according to these safety indexes, The effects of track excitation and curve track on the safety of cross wind are studied. According to the relevant vehicle dynamics standards and codes, the critical wind speed under the limit of safety index is obtained, and according to the critical wind speed, the index suitable for evaluating the safety of cross-wind operation of high-speed trains is studied. The equivalent simplified model of pulsating wind in Lanxin line is studied by comparison with experiment and simulation. According to the critical wind speed of vehicle derailment, the safety margin of speed limit according to safety index under various wind load models is analyzed. By calculating the nonlinear critical velocity of vehicles under different wind load models, the effects of three wind load models on the stability of vehicle snake motion under crosswind are studied. The influence of one-way crosswind on the eccentric wear of the wheel and the safety of the crosswind in the presence of the eccentric wear of the wheel are studied. By calculating the offsets of vehicle contour control points under different wind load models, the effects of three wind load models and track excitations on the vehicle boundary under crosswind are compared and analyzed, and a wind load model suitable for the calculation of the boundary is proposed.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U298

【参考文献】