斜拉索表面粗糙度对干索驰振的影响  

THE INFLUENCE OF SURFACE ROUGHNESS ON THE DRY GALLOPING OF INCLINED CABLES

作　　者：卢照亮 刘晓玲[1] 郑云飞[1] 刘庆宽[2,3] 马文勇[2,3] 刘小兵[2,3] 

机构地区：[1]石家庄铁道大学土木工程学院,石家庄050043 [2]石家庄铁道大学大型结构健康诊断与控制研究所,石家庄050043 [3]河北省大型结构健康诊断与控制重点实验室,石家庄050043

出　　处：《工程力学》2017年第B06期174-178,共5页Engineering Mechanics

基　　金：国家自然科学基金面上项目(51378323/E080802);河北省杰出青年科学基金项目(E2014210138)

摘　　要：新服役的斜拉索表面由一层较为光滑的聚乙烯材料包裹,但随着服役时间的增长,受风化和灰尘粘附等原因的影响,使斜拉索表面粗糙度变大。斜拉索粗糙度的改变对其气动稳定性的影响如何,是该文重点研究的问题。该文通过包裹不同工业砂纸的方式来改变斜拉索表面的粗糙度,利用SJ-410表面粗糙度测量仪测试了这些模型的粗糙度,通过自由振动风洞试验,研究了表面粗糙度对高雷诺数下斜拉索振动的影响,结果表明:表面粗糙度的增大对斜拉索的振动具有抑制作用;随着斜拉索模型表面粗糙度的增加,雷诺数效应减弱,临界雷诺数减小。Although new cables are covered by smooth polyethylene material, weathering and dust adhesion increase the surface roughness of the cables with the growth of service time. In this paper, the influence of roughness of stay cables on aerodynamic stability was studied. The surface roughness of cables was changed through covering the cable with different sandpapers, and the surface roughness was measured with the S J-410 high-precision by free vibration wind tunnel test. The influence of surface roughness on the vibration of stay cables at high Reynolds number was studied by vibration experiments. It was shown that the vibration of stay cables was inhibited with the increase of the surface roughness; the Reynolds number effect became weaker with the increase of surface roughness of the stay cable models.

关 键 词：斜拉索 雷诺数效应 表面粗糙度 斜拉索振幅 风洞试验 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]