从水体基本方程出发，建立坝体与库水动力耦合的有限元法分析模型。全面分析二滩双曲拱坝与库水系统的相互作用，并与其它方法进行比较． Based on the basic equations of water body, a finite element analysis model of dynamic coupling between dam body and reservoir is established. The interaction between Ertan double-curvature arch dam and reservoir and water system is comprehensively analyzed and compared with other methods.