摘要
将上水路对斜拉索竖向振动的影响简化为拟定常气动力随其运动状态的变化,建立了斜拉索风雨振动单自由度分析模型;同时考虑上水路运动的耦合作用后,即发展成为二自由度分析模型。采用Runge-Kutta法分别求解两组非线性微分方程组,得出斜拉索竖向振动的振幅、外力功率的仿真时程,并据此阐述了斜拉索风雨振动发生时系统的能量变化过程。
A single degree of freedom wind-rain-induced vibration analytical model of a piece of cable is formed based on simplifying the influence of upper rivulet on model vertical movement to the variety of quasi steady air force with the change of system state, another two degree of freedom analytical mode is acquired after introducing the coupled effect of upper rivulet. Using Runge-Kutta method, the time history of model amplitude, the power of exciting force and damping force are simulated by solving the ordinary differential equation respectively, and the changing of system energy during vibration is expatiated.
出处
《空气动力学学报》
EI
CSCD
北大核心
2005年第4期480-483,495,共5页
Acta Aerodynamica Sinica
