CRH2型动车组列车交会空气压力波试验分析

阐述胶济线CRH2型动车组列车交会空气压力波实车测试情况,对测试结果进行详细分析,并将实车试验结果与数值模拟计算结果进行比较.研究结果表明:250 km/ h等速交会情况下,实车试验测得的车体表面交会压力波最大幅值为1 195 Pa,在铁路线间距为4.4 m的条件下不会对列车运行安全产生影响;车厢内最大压力变化幅值为19 Pa,仅为车体表面压力变化幅值的1.6%,车厢内产生的压力变化幅值不会对乘客舒适性产生影响;在4.4 m线间距情况下,被测试的CHR2型动车组上的交会压力波幅值近似与同型号等速交会动车组运行速度的平方成正比;数值计算与实车试验得到的规律基本吻合,计算与试验结果相差5.15%,数值计算结果可信.

Analysis of Air Pressure Pulses in Meeting of CRH2 EMU Trains

The real train test on air pressure pulses generated in passing of CRH2 EMU trains on the Qingdao-Jinan Railway Line has been made,and the results have been analyzed in details. The measured results have also been compared with the results of numerical simulation. The following conclusions have been drawn from research: Under the condition of the train meeting at the constant velocity of 250 km/h,the maximum magnitude of the air pressure pulses on the EMU car body reaches 1195 Pa in the real train test,which has no effect on the running safety of the trains travelling on the lines with 4.4 m spacing distance,and the maximum amplitude of the pressure variation inside the car is 19 Pa,being just 1.6% of that on the car body surface,which meets the requirement of comfort of passengers;when two same model trains pass by each other in identical velocity,the amplitude of the air pressure pulses in the CRH2 EMU train measured is approximately directly proportional to the square of the travelling velocity of the other CRH2 EMU train under the condition of 4.4 m distance between adjacent lines; the measured results conform with numerical simulation,their difference being 5.15%.