考虑流固耦合CFRP拉索风雨激振数值模拟

摘要

以肇庆市阅江大桥工程为背景,采用Davenport脉动风速谱,基于自回归模型方法模拟拉索水平脉动风速时程.利用WORKBENCH针对上述计算的风场情况,考虑最易产生风雨激振现象工况,对考虑流固耦合钢索及CFRP拉索风雨激振进行数值模拟.计算结果表明,CFRP索对比传统钢索而言,在风雨激振响应上表现更好,但CFRP索的振动频率更快.%Based on the construction of Yue Jiang Bridge, adapting Davenport spectrum for fluctuating wind, the horizontal wind velocity time series are simulated by the auto regressive model.Combining the wind field condition, the rain-wind induced vibration on fluid-structure interaction for steel cable and CFRP cable is calculated and simulated by considering the condition that is most likely to produce rain-wind induced vibration.The results show that the performance of CFRP cable is better than that of conventional cable, but the vibration frequency of CFRP cable is faster.