带水路斜拉索气动特性的CFD模拟研究  

Simulation of aerodynamic characteristics of cables with rivulet by CFD

作　　者：李永乐[1] 安伟胜[1] 赵彤[1] 王妍[1] 

机构地区：[1]西南交通大学桥梁工程系,四川成都610031

出　　处：《四川建筑科学研究》2011年第5期161-163,共3页Sichuan Building Science

基　　金：国家自然科学基金资助项目(50778155);教育部新世纪优秀人才支持计划(NCET-06-0802);四川省杰出青年学科带头人才计划(2009-15-406)

摘　　要：雨中斜拉桥拉索表面的水滴容易在风的吹拂下形成水线,而索面上侧水路显著改变了斜拉索的气动特性,是斜拉索发生雨振的主要原因。基于计算机流体动力学方法,针对索面水路大小、水路在索面附着位置的不同,对斜拉索气动特性的影响进行了数值模拟研究。研究结果表明,当索面附着水路与风向成70°～90°夹角时,最容易引发斜拉索的风雨激振。In the rain,the drops on the cables of the cable-stayed bridges can easily formed into rivulets under the blowing of the wind.The rivulet on the upper side will significantly change the aerodynamic characteristics of cables,and it is the main factor which causes the vibration of the cables.Based on the computer fluid dynamics,some research was made on numerical simulation of the affects of the size and position of the rivulet on the aerodynamic characteristics of cables.The results show that while the angles betweens the wind direction and the rivulet in the range of 70 ° ~ 90 ° will mostly cause the wind-rain-induced vibration of the cables.

关 键 词：斜拉索 CFD 数值模拟 气动特性 

分 类 号：U44[建筑科学—桥梁与隧道工程]