降低气动效应综合措施的实验研究

Experimental research on comprehensive measures of reducing aerodynamics effect

中国正在大力发展城际高速铁路运输,而在线路中有隧道时,列车进出隧道所产生的微压波问题已经成为限制高速铁路安全、环保、健康发展的障碍。大量研究表明:隧道出口的微压波强度与压缩波的压力梯度成正比,可以通过分析压缩波的压力梯度变化来评价降低微压波的效果。采用模型试验方法,对缓冲设施、减压竖井降低压缩波峰值和压力梯度峰值的效果进行了测试分析。实验结果表明:减压竖井降低首波压力峰值、压力梯度峰值效果明显;洞口缓冲设施降低首波压力峰值的效果不明显,降低压力梯度峰值效果明显,并且降低压力梯度的效果与速度相关。

In China, high-speed railway transmission between cities is being developed with much effort. On the line with tunnel the micro-compression wave created when train passing through tunnel has become a serious problem hindering high-speed railway transmission development in safety, healthy and without pollution. Large numbers of researches showed that the strength of microompression wave is in proportion to the pressure grade of compression wave. By analyzing the pressure grade of compression wave, the effect of reducing microcompression wave can be compared. The effect of tunnel hood and pressure relief shaft reducing peak-pressure and peak-pressure grade was tested and analyzed. The test results show that pressure relief shaft has good effect on reducing peak-pressure and peak-pressure grade, tunnel hood does little favor for reducing peak-pressure and has good effect on reducing peak-pressure grade, and the effect of tunnel hood reducing peak-pressure grade is relevant to speed of train.