斜拉桥拉索风-雨致振动(Ⅰ):机理分析
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摘要
为揭示斜拉索风-雨致振动机理,利用三维绕流空间模型测试的气动力系数,提出了斜拉索风-雨致振动的修正驰振模型;将基于该模型的计算结果与风洞试验结果进行比较,以验证分析模型的有效性,并从能量的角度对斜拉索风-雨致振动的特性进行了探讨.研究表明:斜拉索风-雨致振动本质上是由升力系数负斜率引起的准驰振类型的限幅振动,具有自激和限幅振动双重特性.
In order to explore the mechanism of rain-wind-induced vibration of cables,a modified model for rain-wind-induced vibration of cables was proposed based on aerodynamic coefficients tested by a spatial model with three-dimensional ambient flows.Furthermore,the feasibility of the modified model was verified through a comparison between analytical results and the ones obtained by wind tunnel tests.The characteristics of rain-wind-induced vibration were explored from the aspect of vibration energy.The research indicates that the rain-wind-induced vibration of cables is a type of galloping with a limited amplitude induced by negative slopes of aerodynamic lift coefficients and has the properties of self-excitation and limited amplitude vibrations.
In order to explore the mechanism of rain-wind-induced vibration of cables,a modified model for rain-wind-induced vibration of cables was proposed based on aerodynamic coefficients tested by a spatial model with three-dimensional ambient flows.Furthermore,the feasibility of the modified model was verified through a comparison between analytical results and the ones obtained by wind tunnel tests.The characteristics of rain-wind-induced vibration were explored from the aspect of vibration energy.The research indicates that the rain-wind-induced vibration of cables is a type of galloping with a limited amplitude induced by negative slopes of aerodynamic lift coefficients and has the properties of self-excitation and limited amplitude vibrations.
引文
[1]HIKAMI Y,SHIRAISHI N.Rain-wind inducedvibration of cables in cable stayed bridges[J].Journalof Wind Engineering and Industrial Aerodynamics,1988,29(1/2/3):409-418.
[2]李伟义,张琪昌,何学军.斜拉索风雨激振面内运动的非线性分析[J].天津大学学报,2010,43(2):156-160.LI Weiyi,ZHANG Qichang,HE Xuejun.Nonlinearanalysis of in-plane motion of rain-wind-inducedvibration of stay cable[J].Journal of TianjinUniversity,2010,43(2):156-160.
[3]李寿英,顾明,陈政清.运动水线三维连续弹性拉索风雨激振理论模型[J].湖南大学学报:自然科学版,2009,36(2):1-7.LI Shouying,GU Ming,CHEN Zhengqing.Ananalytical model of rain-wind-induced vibration of three-dimensional continuous stay cable with actual movingrivulet[J].Journal of Hunan University:NaturalSciences,2009,36(2):1-7.
[4]李永乐,廖海黎,李明水,等.人工模拟降雨条件下斜拉索雨振特性模型风洞试验研究[C]∥第13届全国结构风工程学术会议.大连:中国土木工程学会桥梁与结构工程分会风工程委员会,2007:753-757.
[5]陈文礼,李惠,李凤臣.斜拉索风雨激振水线的超声波测试研究[J].地震工程与工程振动,2009,29(1):139-145.CHEN Wenli,LI Hui,LI Fengchen.An ultrasonictransmission thickness measurement system for rivulet onthe stay cable under rain-wind induced vibration[J].Journal of Earthquake Engineering and EngineeringVibration,2009,29(1):139-145.
[6]王修勇,陈政清,倪一清.斜拉桥拉索风雨振观测及其控制[J].土木工程学报,2003,36(6):53-59.WANG Xiuyong,CHEN Zhengqing,NI Yiqing.Wind-rain induced vibration and its control on stay cables ofcable-stayed bridges[J].China Civil EngineeringJournal,2003,36(6):53-59.
[7]YAMAGUCHI H.Analytical study on growthmechanism of rain vibration of cables[J].Journal ofWind Engineering and Industrial Aerodynamics,1990,33(1/2):73-80.(下转第552页)
[8]GU M,LU Q.Theoretical analysis of wind-rain-inducedvibration of cables of cable-stayed bridges[J].Journalof Wind Engineering and Industrial Aerodynamics,2001,89(1):125-128.
[9]XU Y L,WANG L Y.Analytical study of wind-rain-induced cable vibration:SDOF model[J].Journal ofWind Engineering and Industrial Aerodynamics,2003,91(1/2):27-40.
[10]WANG L Y,XUY L.Analytical study of wind-rain-induced cable vibration:2DOF model[J].Wind andStructures,2003,6(4):291-306.
[11]PEIL U,NAHRATHN.Modeling of rain-wind inducedvibrations[J].Wind and Structures,2003,6(1):41-52.
[12]何向东,廖海黎.斜拉索风雨振动分析及机理初探[J].空气动力学学报,2005,23(4):480-485.HE Xiangdong,LIAO Haili.Analysis and initialmechanism research of rain-wind-induced vibration ofstay-cable[J].Acta Aerodynamica Sinica,2005,23(4):480-485.
[13]GU M,DU X Q.Testing investigation for rain-windinduced vibration and its control of cables of cable-stayed bridges[J].Journal of Wind Engineering andIndustrial Aerodynamics,2005,93(1):79-95.
[14]GU M.On wind-rain induced vibration of cables ofcable-stayed bridges based on quasi-steadyassumption[J].Journal of Wind Engineering andIndustrial Aerodynamics,2009,97(7/8):381-391.
[15]XU Y L,LI Y L,SHUM K M,et al.Aerodynamiccoefficients of inclined circular cylinders with artificialrivulet[J].Advances in Structural Engineering,2006,9(2):265-278.
[16]殷殿国.斜拉桥拉索风-雨致振动特性研究[D].成都:西南交通大学土木工程学院,2009.
[2]李伟义,张琪昌,何学军.斜拉索风雨激振面内运动的非线性分析[J].天津大学学报,2010,43(2):156-160.LI Weiyi,ZHANG Qichang,HE Xuejun.Nonlinearanalysis of in-plane motion of rain-wind-inducedvibration of stay cable[J].Journal of TianjinUniversity,2010,43(2):156-160.
[3]李寿英,顾明,陈政清.运动水线三维连续弹性拉索风雨激振理论模型[J].湖南大学学报:自然科学版,2009,36(2):1-7.LI Shouying,GU Ming,CHEN Zhengqing.Ananalytical model of rain-wind-induced vibration of three-dimensional continuous stay cable with actual movingrivulet[J].Journal of Hunan University:NaturalSciences,2009,36(2):1-7.
[4]李永乐,廖海黎,李明水,等.人工模拟降雨条件下斜拉索雨振特性模型风洞试验研究[C]∥第13届全国结构风工程学术会议.大连:中国土木工程学会桥梁与结构工程分会风工程委员会,2007:753-757.
[5]陈文礼,李惠,李凤臣.斜拉索风雨激振水线的超声波测试研究[J].地震工程与工程振动,2009,29(1):139-145.CHEN Wenli,LI Hui,LI Fengchen.An ultrasonictransmission thickness measurement system for rivulet onthe stay cable under rain-wind induced vibration[J].Journal of Earthquake Engineering and EngineeringVibration,2009,29(1):139-145.
[6]王修勇,陈政清,倪一清.斜拉桥拉索风雨振观测及其控制[J].土木工程学报,2003,36(6):53-59.WANG Xiuyong,CHEN Zhengqing,NI Yiqing.Wind-rain induced vibration and its control on stay cables ofcable-stayed bridges[J].China Civil EngineeringJournal,2003,36(6):53-59.
[7]YAMAGUCHI H.Analytical study on growthmechanism of rain vibration of cables[J].Journal ofWind Engineering and Industrial Aerodynamics,1990,33(1/2):73-80.(下转第552页)
[8]GU M,LU Q.Theoretical analysis of wind-rain-inducedvibration of cables of cable-stayed bridges[J].Journalof Wind Engineering and Industrial Aerodynamics,2001,89(1):125-128.
[9]XU Y L,WANG L Y.Analytical study of wind-rain-induced cable vibration:SDOF model[J].Journal ofWind Engineering and Industrial Aerodynamics,2003,91(1/2):27-40.
[10]WANG L Y,XUY L.Analytical study of wind-rain-induced cable vibration:2DOF model[J].Wind andStructures,2003,6(4):291-306.
[11]PEIL U,NAHRATHN.Modeling of rain-wind inducedvibrations[J].Wind and Structures,2003,6(1):41-52.
[12]何向东,廖海黎.斜拉索风雨振动分析及机理初探[J].空气动力学学报,2005,23(4):480-485.HE Xiangdong,LIAO Haili.Analysis and initialmechanism research of rain-wind-induced vibration ofstay-cable[J].Acta Aerodynamica Sinica,2005,23(4):480-485.
[13]GU M,DU X Q.Testing investigation for rain-windinduced vibration and its control of cables of cable-stayed bridges[J].Journal of Wind Engineering andIndustrial Aerodynamics,2005,93(1):79-95.
[14]GU M.On wind-rain induced vibration of cables ofcable-stayed bridges based on quasi-steadyassumption[J].Journal of Wind Engineering andIndustrial Aerodynamics,2009,97(7/8):381-391.
[15]XU Y L,LI Y L,SHUM K M,et al.Aerodynamiccoefficients of inclined circular cylinders with artificialrivulet[J].Advances in Structural Engineering,2006,9(2):265-278.
[16]殷殿国.斜拉桥拉索风-雨致振动特性研究[D].成都:西南交通大学土木工程学院,2009.
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