在滑移理论的基础上，通过COMSOL软件建立带有双螺旋线的斜拉索圆柱绕流模型，得到斜拉索的风压力系数和风摩擦系数。忽略斜拉索在横风向上的振动，通过改变风向得到在不同截面下带有双螺旋线的斜拉索受到的气动力，进而求得斜拉索的振动时程曲线及其频谱分析结果。结果显示，双螺旋线的存在抑制了水线在斜拉索表面的振荡，使得斜拉索在横风向受到的拉索气动力变化范围逐渐缩小，气动力的振荡频率远大于斜拉索的自振频率，降低了水线与斜拉索产生共振的可能性，从而抑制了斜拉索的风雨激振现象。
Abstract
On the basis of lubrication theory, a model of cylindrical flow around a stay cable with double helix was established by COMSOL software, and the wind pressure coefficient and wind friction coefficient of the stay cable were obtained. Ignoring the vibration of the stay cable in the cross-wind direction, the aerodynamic force of the stay cable with double helix under different cross-sections is obtained by changing the wind direction, that the vibration time history curve and frequency spectrum analysis of the stay cable are also obtained. The results show that the existence of the double helix suppresses the oscillation of the rivulet on the surface of the stay cable, so that the cable aerodynamic changes in the cross-wind directions gradually decrease, accompanied by the aerodynamic oscillation frequency is much greater than that of the cable stay. Therefore, the wind-rain-induced vibration of the cable is suppressed because of the possibility of resonance between the rivulet and the cable is greatly reduced.
关键词
风雨激振 /
气动减振 /
螺旋线 /
滑移理论 /
水线
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Key words
rain-wind induced vibration /
aerodynamic vibration reduction /
spiral line /
lubrication theory /
rivulet
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参考文献
[1]李明水，何向东.斜拉索风雨振动及制振措施的风洞试验研究[J].实验流体力学，2010,24（6）：11-15.
LI Ming-shui, HE Xiang-dong. Wind-tunnel test research on wind and rain vibration of stay cables and vibration control measures[J]. Experimental Fluid Mechanics, 2010,24(6):11-15.
[2]Gu M，Du X Q，Li S Y . Experimental and theoretical simulations on wind–rain-induced vibration of 3-D rigid stay cables[J]. Journal of Sound and Vibration . 2009,320 :184–200.
[3]杜晓庆，顾明，全涌.斜拉桥拉索风雨激振控制的试验研究[J].同济大学学报，2003,31（11）:1266-1269.
DU Xiao-qing, GU Ming, QUAN Yong.Experimental research on wind-rain-induced vibration control of cable-stayed bridges[J].Journal of Tongji University, 2003,31(11):1266-1269.
[4]毕继红，乔皓月，关键等.纵向肋条对斜拉索减振特性的影响研究[J].中国安全科学学报，2019,29（6）:134-139.
BI Ji-hong, QIAO Hao-yue, GUAN Jian et al. Research on the influence of longitudinal ribs on the vibration damping characteristics of stay cables[J]. Chinese Safety Science Journal, 2019,29(6):134-139.
[5]李文勃，林志兴.抑制斜拉桥拉索风雨激振 的气动措施研究[J].土木工程学报，2005， 38(5): 48-53.
LI Wen-bo, LIN Zhi-xing. Study on aerodynamic measures for restraining wind-induced vibration of cables of cable-stayed bridges [J]. Journal of Civil Engineering, 2005, 38 (5): 48-53.
[6]李寿英，钟卫，陈政清.缠绕螺旋线斜拉索气动性能的数值模拟[J].振动工程学报.2014,27(4):488-496.
LI Shou-ying, ZHONG Wei, CHEN Zheng-qing. Numerical simulation of aerodynamic performance of twisted helical stay cable[J]. Chinese Journal of Vibration Engineering.2014,27(4):488-496.
[7]顾明，杜晓庆.模拟降雨条件下斜拉桥拉索风雨激振及控制的试验研究[J].土木工程学报.2004,27(7):101-105.
GU Ming, DU Xiao-qing.Experimental study on wind-rain-induced vibration and control of cable-stayed bridge cables under simulated rainfall conditions[J].China Civil Engineering Journal.2004,27(7):101-105.
[8]李寿英，钟卫.缠绕螺旋线斜拉索气动性能的试验研究[J].土木工程学报.2013,46(7):108-115.
LI Shou-ying, ZHONG Wei.Experimental research on aerodynamic performance of twisted spiral stay cable[J].China Civil Engineering Journal.2013,46(7):108-115.
[9]CHEN Wen-li, TANG Shan-ran, LI Hui, et al. Influence of Dynamic Properties and Position of Rivulet on Rain-Wind-Induced Vibration of Stay Cables[J], Journal of Bridge Engineering ,2013, 18(10), 1021–1031.
[10]GAO D L, CHEN W L,et al. Multi-mode responces,rivulet dynamics flow structures and mechanism of rain-wind induced vibrations of a flexible cable[J],Journal of Fluids and Structures,2018,82:154-172.
[11]Gao D L, CHEN W L,ZHANG R T, et al. Multi-modal vortex- and rain-wind- induced vibrations of an inclined flexible cable[J], Mechanical Systems and Signal Processing, 2019, 118, 245-258.
[12]毕继红，武骥，关健，等. 斜拉索风雨激振数值模拟及其机理探究[J].振动与冲击, 2017, 36(11):111-117.
BI Ji-hong，WU Ji，GUAN Jian，et al. Numerical simulation of rain-wind induced vibration of stay cables and its mechanism[J]. Vibration And Shock，2017, 36 (11): 111-117.
[13]Bi J H ，Wang J ，Shao Q . 2D numerical analysis on evolution of water film and cable vibration response subject to wind and rain[J]. Journal of Wind Engineering And Industrial Aerodynamics,2013,121:49-59.
[14]毕继红，乔浩玥，关健，等. 带有纵向肋条斜拉索的风雨激振减振机理研究[J]. 工程力学. 2018，35(4): 168-175.
BI Ji-hong, QIAO Hao-yue, GUAN Jian, et al. Research on the mechanism of wind-induced vibration damping of stayed cables with longitudinal ribs [J]. Engineering Mechanics. 2018, 35 (4): 168-175.
[15]Li F C，Chen W L，Li H，et al. An ultrasonic transmission thickness measurement system for study of water rivulets characteristics of stay cables suffering from wind-rain-induced vibration [J]. Sensors and Actuators A: Physical. 2010, 159(1): 12―23.
[16]白雨润，赵善博，刘庆宽，等.螺旋线参数对斜拉索风雨振抑制效果的影响[J].工程力学.2015,32(Suppl):310-313.
BAI Yu-run, ZHAO Shan-bo, LIU Qing-kuan, et al. The influence of spiral parameters on the wind-rain-vibration suppression effect of stay cables[J].Engineering Mechanics.2015,32(Suppl):310-313.
[17]Achenbach E. Distribution of local pressure and skin friction around a circular cylinder in a cross-flow up to Re= [J]. Journal of Fluid Mechanics, 1968,34(4): 625~639.
[18]Fage A, Falkner V M. Further Experiments on the flow around a circular cylinder[J]. London: H.M.S.O, 1931.
[19]Celika I, Shaffer F D. Long time-averaged solutions of turbulent flow past acircular cylinder. Journal of Wind Engineering and Industrial Aerodynamics,1995, 56(2): 185~212.
[20]李文勃，林志兴，杨立波.超长斜拉索风阻系数及风雨激振的试验研究[J].振动、测试与诊断.2005,25(2):85-90.
LI Wen-bo, LIN Zhi-xing, YANG Li-bo.Experimental study on wind resistance coefficient and wind-rain-induced vibration of super-long stay cables[J].Vibration、Testing and Diagnosis.2005,25(2):85-90.
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