气动外形对拉索风雨振影响的模型试验研究  

Experimental Study on Physical Model of Influence of Aerodynamic Configuration on Cable Wind-Rain Induced Vibration

作　　者：任万敏[1] REN Wanmin

机构地区：[1]中国中铁二院工程集团有限责任公司,成都610031

出　　处：《公路交通技术》2018年第2期31-36,43,共7页Technology of Highway and Transport

摘　　要：为了研究拉索气动外形对其风雨振的影响,选用4种不同直径及表面的斜拉索进行节段模型静、动力风洞模型试验研究,分析不同斜拉索风雨振的产生条件和振幅。试验结果表明,在临界姿态下,模型A,B,D都发生了雨振,模型A的振幅最小;模型C在测试风速范围内未发生雨振,仅风速较高时振幅稍大。综合考虑静风设计要求与风雨振动的制振效果的情况下,模型C应是最佳拉索截面形式。In order to study the influence of cable aerodynamic configuration on its wind-rain induced vibration,four types of stay cables with different diameters and surfaces are selected to carry out sectional model of static and dynamic wind tunnel model experimental study so as to analyze the creation conditions and amplitude of wind-rain induced vibration of different stay cables.The experimental results show that,in the critical state,rain-induced vibration occurs in models A,B and D,among which the amplitude of the model A is the smallest.Model C does not experience rain-induced vibration within the range of test wind speed,and only at higher wind speeds its amplitude is slightly large.In overall consideration of static wind design requirements and the vibration inhibiting effect of wind-rain induced vibration,Model C should be the optimal section form of cable.

关 键 词：斜拉索 风雨振 气动外形 风洞试验 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]