不同类型挡风墙对列车运行安全防护效果的影响  

Wind-proof effect of different kinds of wind-break walls on the security of trains

作　　者：刘凤华[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《中南大学学报（自然科学版）》2006年第1期176-182,共7页Journal of Central South University:Science and Technology

基　　金：铁道部科技开发计划项目(2003J019)

摘　　要：采用二维粘性不可压缩雷诺平均应力方程,在横风风速、路堤高度、挡风墙高度、设置位置相同时,分别对加筋对拉式、“L”型、薄型和土堤式这4种挡风墙背风侧车辆的气动力进行数值模拟计算。计算结果表明:加筋对拉式挡风墙中车辆受到的侧向力和侧滚力矩最小,防护效果最好,其次是“L”型和薄型挡风墙,防护效果最差的是土堤式挡风墙。The numerical simulation calculation was carried out to obtain the aerodynamic force of the trains with four kinds of wind-break walls. The two dimension ineompressible viscous N-S equation was used, with the cross-wind speed, height, position of wind-break wall and height of the embankment being the same. Calculation results show that the lateral force and overturning moment of the train are the smallest for the wind-break wall of the tendon type, so its wind-proof effect is the best, while the effects of the wall with ＂L＂ shape and over-thin rank second, but the effect of the earth type is the least.

关 键 词：挡风墙 气动力 数值模拟 

分 类 号：U270.1[机械工程—车辆工程]