溢流混凝土面板堆石坝的泄槽—水流—坝体耦合系统动力特性分析

The coupled system dynamical characteristic anlysis of chut-flow-dam body of overfall concrete face rockfill dam

采用ANSYS有限元软件和流—固耦合理论[1,2],计算、分析了溢流混凝土面板堆石坝的泄槽—水流—坝体的耦合振动模态特性和泄槽动力稳定性,同时应用随机振动理论对脉动压力作用下的泄槽及地基的动力响应作出了定量估算,与原来的双渐方法(DAA)的结果进行了比较,验证了计算结果的合理性,进而分析了坝体动弹模和堆石厚度对系统动力特性的影响。

The paper calculates and analyses an coupling oscillating mode trait of chute-flow-dam body and the dynamic stability of the chute of overfall concrete face rockfill dam by using ANSYS finite element software and the theory of fluid-solid coupling. And by means of the stochastic oscillation theory, the dynamic response of the chute and foundation acted by pulse pressure has been estimated quantitatively, which is comparied with the result of DAA method and proves the analysis result is feasible. Furthermore, the effect of rigidity of dam and rockfill thickness on dynamic character of the system was analysed.