挡风墙高度的研究

A Study on the Height of Wind Break Wall

本文在观测大风特性和气动力实验基础上,通过拟定的评估方法,认为:两种类型挡风墙的防风性能相差甚小、挡风墙高度自轨面起算应为2.4m。比既有挡风墙高度分别降低25％和33％,每公里工程造价可节省约40万元。 本文首次给出全尺寸车辆现场风压试验结果,为今后深入研究车辆风洞实验的相似律提供了科学依据。且着重讨论了运动车辆的侧风气动特性。

Based on wind survey and aerodynamic test in wind tunnel and on railway track using model and fullscale ears, the difference between the wind-proof performances of wind break walls of the earth type and the L shaped reinforced concrete shaped type is very small. According to the requirement of train operation the assessment principle and method for wind break wall are presented.The heights of the two types of wind break wall are both 2.4 meters above rail top. The construction cost per kilometer is decreased by 33% or so.The wind pressure distribution of full-scale railway cars on railway track is obtained for the first time. It provides a basis for more thorough study of the similarity law for wind tunnel test. And the lateral aerodynamic property of moving cars is also discussed.