高速铁路接触网系统气动弹性模型风洞试验研究  

Wind Tunnel Test on Aeroelastic Model of Catenary System for High Speed Railway

作　　者：谢强[1,2] 支希 李海若[1] 孙启刚[1] 肖永武 

机构地区：[1]同济大学建筑工程系,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]中铁电气化局集团有限公司上海电气化工程公司,上海200436

出　　处：《中国铁道科学》2015年第3期73-80,共8页China Railway Science

基　　金：铁道部科技研究开发计划项目(J2011J006);中央高校基本科研业务费专项资金资助项目(20113179)

摘　　要：为研究高速铁路接触网系统的风振特性,按照气动弹性模型相似理论建立5柱4跨接触网系统的气动弹性模型,并进行其风洞试验;采用加速度传感器、激光位移计以及三维动态激光位移计,分别测量腕臂结构的加速度、位移以及接触线三维动态位移,研究均匀流场（试验风速级数范围为3~14m·s-1）和紊流度为20%的紊流场（试验风速级数范围为2~8m·s-1）条件下风攻角为90°和60°时,接触网系统腕臂结构和接触线不同位置的风振响应。结果表明：相同风速下,接触线在紊流场中的位移响应大于在均匀流场的响应;风攻角对接触网挂线点和接触线的影响不同,相比较而言,60°风攻角对挂线点更为不利,而90°风攻角对接触线更为不利;同一吊弦区段内接触线跨中的3点风偏位移基本相同。An aeroelastic model with five posts and four spans was constructed according to the design requirements for catenary system and similarity theory.The wind tunnel tests were carried through to study the wind vibration characteristics of the catenary system for high speed railway.The acceleration,displacement of the cantilever structure and the 3D dynamic displacement of the contact wire were tested by accelerometer,laser displacement meter and 3Ddynamic laser displacement meter respectively.The wind vibration response of cantilever structure and contact wire at different positions was studied under uniform flow（the test wind speed from 3to 14m·s-1）and turbulent flow with 20%turbulent intensity（the wind speed from 2to 8m·s-1）at the wind attack angles of 90°and 60°.The results show that,under the same wind speed,the displacement response of contact wire under turbulent flow is greater than that under uniform flow.The influence of wind attack angles on the hanging point of catenary and contact wire is different.By comparison,the wind attack angle of 60°is more unfavorable to hanging point and the wind attack angle of 90°is more unfavorable to contact wire.The windage yaw displacements at the three points on the midspan of contact wire in the same dropper section are similar.

关 键 词：高速铁路 接触网系统 风振特性 风洞试验 气动弹模型 相似理论 

分 类 号：U225.3[交通运输工程—道路与铁道工程]