【摘要】 考虑渡槽的流 -固耦合效应 ,导出了结构风振方程 ,导得了流 -固耦合系统的传递函数矩阵的模态展开式 ,给出了结构风振响应的时域 (时程分析 )和频域 (随机振动 )计算公式 .通过时程分析与随机风振的数值算例表明 ,结构风振响应分析一般应同时考虑结构振荡模态与流体振荡模态的贡献 ,提出的计算方法是可行的 ,可用于工程设计参考 .更多还原

【Abstract】 In this paper the wind-induced vibration equations of aqueduct-bridge structure,with fluid-structure interaction,were given.The transfer function matrix of the system was derived in the modal expansion.The general response formulas in time and frequency domain were presented for the structure subjected to dynamic wind load.Several numerical examples(time-history and random-vibration analyses) were conducted.The results suggest that both "structure-oscillation-mode" and "fluid-oscillation-mode" should be considered in the structural response analysis.The analytical method of this paper is valid and can be used in engineering designs.更多还原