斜拉索参数振动响应的数值分析

外界因素作用于振动系统时，系统参数会随着外界因素改变而产生不平衡力，不平衡力不直接作用于系统方程．因此，时参数振动的研究归结为对非线性方程的不稳定区的研究．特别是H．MaxIrvine完善了索结构理论以后，国内外对参数振动的研究更加深入．本文通过对影响参数振动因素的讨论，得到了参数振动随频率的变化规律，并在三维有限元模型中进行了验证，为以后桥梁运营中抑制斜拉索的疲劳破坏提供了参考．

Numerical Analysis of Parameters Vibration Response of Cable-stayed

When the external factors acting on the vibration system, the system parameters will change with the external factors and generate unbalanced force,which does not act directly on the system of equations.In particular, after H.Max Irvine had improved the cable structure theory, the study on the parametric vibration at home and abroad it had arrived a higher level.Through discussion of the factors affecting the parameters vibration on the paper, it obtained the law of parameters vibration changing with frequency, and verified on the three-dimensional finite element model,which provides reference for preventing the fatigue damage of stayed-cable in the operation of bridge.