考虑动水压力和流固耦合的库水-坝体-地基系统建模与动力分析

结合动水压力模型和罚函数耦合算法，考虑地基和坝体结构的接触以及边界效应，构建动水压力和流固耦合作用下的库水-坝体-地基地震响应分析模型和方法。通过与试验结果及解析解和实测数据对比，验证了本文模型和方法能准确反映系统地震荷载和分析整体耦合系统的动力响应，引入罚函数处理流固耦合界面能提高计算收敛速度。进一步以某重力坝工程实际为背景，验证本文构建的模型和方法适用于库水-坝体-地基耦合系统动力分析的可行性，并分析了地震作用下地基变形对系统动力响应的影响。

Modeling and dynamic analysis of reservoir-dam-foundation considering hydrodynamic pressure and fluid-structure interaction

Combing hydrodynamic pressure model and penalty function coupling algorithm,a numerical model and its solution approach were proposed for analyzing the seismic response of reservoir-dam-foundation system,considering the contact between dam and foundation as well as the boundary effect.The validity of the model is verified by comparing the numerical results with the experimental results and analytical solutions in the literature.It shows that the proposed model and approach is able to describe the seismic load acting on the reservoir-dam-foundation system and the dynamic response of the coupling system accurately with higher efficiency due to the application of penalty function to deal with fluid-structure interfaces.Application of the proposed model to analysis of a gravity dam demonstrates the applicability of the model to dynamic analysis of a reservoir-dam-foundation system,and the effect of foundation deformation on the dynamic response of the system has been analyzed further.