【摘要】 根据斜拉桥柔性拉索的结构特点 ,建立了具有弹性支承的斜拉桥柔性拉索的动力分析模型 .从势能驻值原理出发 ,导出了斜拉桥柔性拉索在两端弹性支承情况下的振动方程 ,按“对号入座”法则得到了柔性拉索体系的刚度矩阵和质量矩阵 ,并分析了弹性支承对斜拉桥柔性拉索自振特性的影响 ,所得结果可用于确定斜拉桥拉索的预拉力 .该模型是斜拉桥拉索动力分析的实用模型 .更多还原

【Abstract】 Based on structural characteristic of flexible cable of cable stayed bridge,a model for dynamic analysis of flexible cable of cable stayed bridge with elastic support is presented.The vibration equations of flexible cable with elastic support are deduced according to the principle of stationary potential energy,and the matrix of stiffness and mass are derived by the principle of “fit in the right seat”.The effect of elastic support on the natural frequency of flexible cable is analyzed.The results may be used to obtain the prestress of flexible cable of cable stayed bridge.The model proves to be practical for dynamic analysis of flexible cable.更多还原