【摘要】 结合Lemaitre斜拉索表面水膜风致形变解析算法,对数学模型中拉索运动方程进行修正,使其能计入拉索风致运动对表面附着水膜形态的影响,通过差分方法对方程进行数值求解,并进行参数分析:研究拉索表面水膜在重力、表面风压、表面摩擦力、表面张力作用下的形态变化,得到拉索发生风雨激振时表面水线的运动规律及形态变化。采用超声波探测仪对拉索表面水膜进行动态测量,实时获得拉索风雨激振形态下表面水膜动态响应数据,通过与水膜运动数值算法结果进行对比一定程度上探讨了圆截面斜拉索风雨振发生机理。更多还原

【Abstract】 Combined the algorithm of wind-induced deformation of water film on stayed-cable which developed by Lemaitre,equation of motion in the mathematical model was modified,morphologic changing of water film which induced by the motion of cable could be concerned.Through solving the function by difference methods and parametric analysis,the evolution of water film which subject to gravity,wind pressure,friction and surface tension was investigated.We had got the movement and morphologic changing of the water rivulet when rain-wind induced vibration(RWIV) happened.Use ultrasonic transmission thickness measurement system(UTTMS),the real-time dynamic response data of the water film in condition of RWIV are measured.Compare the result with that of numerical analysis;the mechanism of RWIV of cable with circle cross section has been investigated in some extent.更多还原