编组长度对高速列车表面交变压力载荷的影响  

Numerical simulation of impact of train length on alternating pressure load

作　　者：周丹[1] 贾丽荣[1] 牛纪强 

机构地区：[1]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,湖南长沙410075

出　　处：《铁道科学与工程学报》2018年第1期1-7,共7页Journal of Railway Science and Engineering

基　　金：湖南省自然科学基金资助项目(14JJ3028);中国铁路总公司重大课题资助项目(2016ZB17);湖南省研究生科研创新资助项目(CX2015B046)

摘　　要：基于标准κ-ε双方程湍流模型,采用滑移网格方法,对不同编组长度(3车编组,4车编组,5车编组和8车编组)高速列车明线交会以及于各自最不利长度隧道通过和交会工况进行模拟,并对车体表面产生的交变压力载荷进行研究。数值计算结果和实车试验结果进行对比,波形吻合度高,误差不超过6%。研究结果表明:列车明线交会时,列车压力波尾波幅值由3车编组到8车编组减小11%;列车于各自最不利长度隧道通过和交会时,编组长度不改变列车车体表面压力波变化规律,但对幅值有较明显影响;列车通过隧道时压力波峰峰值由3车编组到8车编组增大14.0%,列车于隧道中心处交会时该值增大26.4%。Based on the standard κ-ε equation turbulence mode, using sliding mesh method, different length of trains （3 cars, 4 cars, 5cars and 8cars） passing by each other, operation and passing in the tunnel of worst length were all simulated. The pressure load on train surface was analyzed. Numerical results were compared with measurements from the full-scale train test. The wave shape fits well and the maximum error is below 6%. The results showed that the amplitude of pressure tail wave reduced by 11% in trains with 3 cars to 8 cars when pass by each other. The distribution regularity of pressure in the train is not changed by the train length, but the effect of the train length on pressure amplitude is obvious when operate and pass in the tunnel of worst length. The peak to peak of pressure reduced by 14.0% in trains with 3 cars to 8 cars when operation in tunnel, the value reduced by 26.4% when passing in tunnel.

关 键 词：高速列车 列车长度 交会 隧道 交变压力 

分 类 号：U27[机械工程—车辆工程] V211[交通运输工程—载运工具运用工程]