斜拉桥索—塔—梁耦合参数振动

The Research on Coupling Parametric Vibration of Cable-tower-girder in Cable-stayed Bridge

综合考虑拉索的垂度、倾角、几何非线性,建立了斜拉索-塔-主梁耦合振动模型,推导出三自由度非线性参数1振动微分方程组。以国内某桥为工程背景,分析参数振动可能性,研究参数振动特性,分析了倾角、初始扰动、阻尼对索振动效应的影响。

Considering with the sag,clination and geometry nonlinearity,a coupling parametric vibration model was built and the three-degree-of-freedom nonlinear parametric vibration differential equations were gained. Taking some Bridge as the project background, the paper analysed the possibility of parametric vibration and studied the characteristics of vibration. The influence of the various parameters, such as the sag, the initial disturbances, the damping and so on, were investigated.