基于实车试验的高速列车隧道压力波影响因素

发布时间：2018-04-05 23:25

本文选题：高速列车　切入点：隧道交会　出处：《中南大学学报(自然科学版)》2017年05期

【摘要】：搭建列车空气动力学在线实车高精测试平台,对列车通过隧道及隧道交会工况下的压力波特性进行实车测试;探究运行速度、隧道长度、阻塞比、编组长度、交会位置等因素对隧道压力波的影响规律;根据隧道内压缩波、膨胀波在隧道内传播、反射、叠加的原理,推导出隧道通过及隧道交会工况下,最不利单线隧道长度、最不利双线隧道长度、最不利交会位置、最不利编组长度等计算公式。研究结果表明:车体表面压力变化幅值与列车速度的平方成正比;车内压力幅值与列车速度的n次方成正比,n的范围为1.3~1.8,n随着隧道长度的变化而变化;研究结果可为高速列车在隧道内运行时的安全性指标提供了压力波评判依据。
[Abstract]:The train aerodynamics on-line high precision test platform is built to test the pressure wave characteristics of train passing through the tunnel and tunnel intersection condition, and the running speed, tunnel length, blocking ratio, formation length, the running speed, the tunnel length, the blocking ratio, the formation length, the running speed, the tunnel length, the blocking ratio, the formation length,According to the principle of propagation, reflection and superposition of the compression wave and expansion wave in the tunnel, the length of the most unfavorable single-line tunnel is deduced under the condition of tunnel passing through and tunnel crossing.The most unfavorable double-line tunnel length, the most unfavorable intersection position, the most unfavorable formation length and so on calculation formula.The results show that the amplitude of the surface pressure is proportional to the square of the train speed, the range of the amplitude of the inner pressure is proportional to the n power of the train speed, and the range of the variation of the pressure on the surface of the car is 1. 3 / 1. 8 / n with the change of the length of the tunnel.The results can be used to judge the safety index of high speed train in tunnel.
【作者单位】：中南大学交通运输工程学院轨道交通安全教育部重点实验室;中车青岛四方机车车辆股份有限公司国家高速动车组总成工程技术研究中心;
【基金】：国家自然科学基金资助项目(U1134250,51405517)~~
【分类号】：U270.14;U451.3

【相似文献】