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高速列车会车时产生的空气压力波动会给交会车辆的侧窗造成很大的冲击,有可能出现破窗事故,给乘客和列车运行带来安全隐患。以三维、非稳态、粘性雷诺时均方程和k-ε两方程紊流模型为基础,采用移动网格的有限体积数值计算方法,仿真分析5种车速(200km/h、250km/h、300km/h、350km/h、400km/h)条件下明线和长隧道内等速会车的动态过程。得到侧窗上完整的会车压力波变化曲线。计算结果表明,明线会车与长隧道内会车产生的压力波对列车侧窗的影响有很大的不同,长隧道内会车时在交会车辆侧窗上产生的气动负压波峰值比明线会车时产生的负压波峰值要大将近一倍,因此不能将明线上会车压力波变化结论外推到隧道内会车情况。以计算结果为基础,分析会车引起破窗的原因和评价侧窗强度的方法。在进行高速列车侧窗设计时,不但要考虑窗玻璃本身的抗冲击强度,还必须考虑列车侧窗的安装强度。相同面积的侧窗,周长大的车窗更有利。
High-speed train will be produced when the air pressure fluctuations will rendezvous vehicles side windows caused a great impact, there may be a broken window accident, passengers and trains running a security risk. Based on the three-dimensional, unsteady and viscous Raynaud’s time-averaged equations and the k-ε two-equation turbulence model, the finite volume numerical method of moving grid was used to simulate and analyze five vehicle speeds (200km / h, 250km / h and 300km / h, 350km / h, 400km / h), the dynamic process of constant speed cars in open and long tunnels. Get the full window on the car pressure wave curve. The calculation results show that the pressure wave produced by the meeting car in the Mingcun car and the long tunnel has a great difference on the side windows of the train. The peak value of the aerodynamic negative pressure generated on the side window of the rendezvous car during the meeting of the long tunnel is larger than that of the bright line When the car will produce negative pressure wave peak nearly doubled, it can not be on the line will be car pressure wave changes conclusions extrapolated to the tunnel will be the case. Based on the calculation results, the paper analyzes the causes of broken windows and the method of evaluating the strength of side windows. In the design of high-speed train side windows, not only to consider the impact strength of the window glass itself, you must also consider the mounting side of the train strength. The same area of the side windows, large windows of the week more favorable.