风雨激振中拉索与水线耦合运动规律研究
|
摘要
在建立了水线运动与拉索振动相互耦合的三维连续弹性拉索风雨激振理论模型的基础上,通过振型分解,得到了以拉索各阶振型表示的拉索运动微分方程。利用该理论模型对实际拉索发生风雨激振时拉索和水线的运动规律进行了分析,结论表明:拉索风雨激振具有"限速"、"限幅"的特征;拉索的振动包含多阶拉索固有频率,拉索模态间相互耦合,并不断转化;水线沿拉索表面周向的运动具有一定的周期性,运动时程曲线并非呈正弦规律,其运动频率与拉索振动频率基本一致;水线沿拉索轴向分布不是一条直线,处于平均竖向气动力突降区的水线长度对拉索的振幅有较大的影响。
Based on the formulation of analytical model of rain-wind-induced vibration of three-dimensional continuous elastic cable and rivulet coupled system,cable equations expressed by modes of cable were obtained using modes decoupling method.Cable and rivulet movement regulations in rain-wind-induced vibration were analysed.It is shown that rain-wind-induced vibration of cable is of "velocity restricted" and "amplitude restricted" characteristics.The motion of cable includes several natural modes which are coupled and transformed mutually.The circumferential motion of rivulet is of periodic and non-sine property.Frequencies of moving rivulet are basically in accordance with cable frequencies.The distribution of rivulet along axial direction of cable is not like a straight line.The length of rivulet in the sudden dive range of aerodynamic force has an important effect on cable amplitude.
Based on the formulation of analytical model of rain-wind-induced vibration of three-dimensional continuous elastic cable and rivulet coupled system,cable equations expressed by modes of cable were obtained using modes decoupling method.Cable and rivulet movement regulations in rain-wind-induced vibration were analysed.It is shown that rain-wind-induced vibration of cable is of "velocity restricted" and "amplitude restricted" characteristics.The motion of cable includes several natural modes which are coupled and transformed mutually.The circumferential motion of rivulet is of periodic and non-sine property.Frequencies of moving rivulet are basically in accordance with cable frequencies.The distribution of rivulet along axial direction of cable is not like a straight line.The length of rivulet in the sudden dive range of aerodynamic force has an important effect on cable amplitude.
引文
[1]Hikami Y,Shiraishi N.Rain-wind induced vibrations ofcables in cable stayed bridges[J].Journal of WindEngineering and Industrial Aerodynamics,1988,29(2):409-418.
[2]Matsumoto M,Yagi T,Mitsutaka G,et al.Rain-wind-induced vibration of inclined cables at limited high reducedwind velocity region[J].Journal of Wind Engineering andIndustrial Aerodynamics,2003,91(1):1-12.
[3]Liu Q K.The effects of water rivulet and axial flow on cableaerodynamics of cable-stayed bridges[D].Kyoto:KyotoUniversity,2006.
[4]Ruscheweyh H P.The mechanism of rain-wind-inducedvibration[C]//Wing Engineering into the 21st Century,Larsen,Larose&Livesey(eds),Balkema.Rotterdam:1999:1041-1047.
[5]Gu M,Du X Q.Experimental investigation of rain-wind-induced vibration of cables in cable-stayed bridges and itsmitigation[J].Journal of Wind Engineering and IndustrialAerodynamics,2005,93(1):79-95.
[6]陈政清.斜拉索风雨激振现场观测与振动控制[J].建筑科学与工程学报,2005,22(4):5-10.
[7]Cosentino N,Flamand O,Ceccoli C.Rain-wind-inducedvibration of inclined stay cables Part I:experimentalinvestigation and physical explanation[J].Wind andStructures,2003,6(6):471-484.
[8]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.
[9]李寿英,陈政清,顾明.斜拉索风雨激振中拉索和水线之间的耦合运动[J].振动与冲击,2008,27(10):1-5.
[10]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.
[11]Xu Y L,Wang L Y.Analytical study of wind-rain-inducedcable vibration:SODF model[J].Journal of WindEngineering and Industrial Aerodynamics,2003,91(1):27-40.
[12]刘庆宽.斜拉桥斜拉索风雨振时索表面水线摆动作用及规律的试验研究[J].土木工程学报,2007,40(7):62-67.
[13]李暾,陈政清,李寿英.拉索表面材料对风雨激振的影响研究[J].工程力学,2009,26(7):47-53.
[14]任淑琰,顾明.斜拉桥拉索静力构形分析[J].同济大学学报(自然科学版),2005,33(5):595-599.
[15]左晓宝,李爱群,赵翔.斜拉索在平面内的非线性自由振动分析[J].工程力学,2005,22(8):101-105.
[16]Gu M,Du X Q,Li S Y.Experimental and theoreticalsimulations on wind-rain-induced vibration of 3-D rigid staycables[J].Journal of Sound and Vibration,2009,320(2):184-200.
[2]Matsumoto M,Yagi T,Mitsutaka G,et al.Rain-wind-induced vibration of inclined cables at limited high reducedwind velocity region[J].Journal of Wind Engineering andIndustrial Aerodynamics,2003,91(1):1-12.
[3]Liu Q K.The effects of water rivulet and axial flow on cableaerodynamics of cable-stayed bridges[D].Kyoto:KyotoUniversity,2006.
[4]Ruscheweyh H P.The mechanism of rain-wind-inducedvibration[C]//Wing Engineering into the 21st Century,Larsen,Larose&Livesey(eds),Balkema.Rotterdam:1999:1041-1047.
[5]Gu M,Du X Q.Experimental investigation of rain-wind-induced vibration of cables in cable-stayed bridges and itsmitigation[J].Journal of Wind Engineering and IndustrialAerodynamics,2005,93(1):79-95.
[6]陈政清.斜拉索风雨激振现场观测与振动控制[J].建筑科学与工程学报,2005,22(4):5-10.
[7]Cosentino N,Flamand O,Ceccoli C.Rain-wind-inducedvibration of inclined stay cables Part I:experimentalinvestigation and physical explanation[J].Wind andStructures,2003,6(6):471-484.
[8]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.
[9]李寿英,陈政清,顾明.斜拉索风雨激振中拉索和水线之间的耦合运动[J].振动与冲击,2008,27(10):1-5.
[10]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.
[11]Xu Y L,Wang L Y.Analytical study of wind-rain-inducedcable vibration:SODF model[J].Journal of WindEngineering and Industrial Aerodynamics,2003,91(1):27-40.
[12]刘庆宽.斜拉桥斜拉索风雨振时索表面水线摆动作用及规律的试验研究[J].土木工程学报,2007,40(7):62-67.
[13]李暾,陈政清,李寿英.拉索表面材料对风雨激振的影响研究[J].工程力学,2009,26(7):47-53.
[14]任淑琰,顾明.斜拉桥拉索静力构形分析[J].同济大学学报(自然科学版),2005,33(5):595-599.
[15]左晓宝,李爱群,赵翔.斜拉索在平面内的非线性自由振动分析[J].工程力学,2005,22(8):101-105.
[16]Gu M,Du X Q,Li S Y.Experimental and theoreticalsimulations on wind-rain-induced vibration of 3-D rigid staycables[J].Journal of Sound and Vibration,2009,320(2):184-200.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心