动力分析的刚体－界面元与有限元耦合法

Coupling Method of Rigid-Body Interface Stress Element(RISE)with Finite Element(FE) in Dynamic Analysis

提出了刚体－界面元、有限元与半无限元相耦合的算法，研究了挡水结构系统的动力特性及在地震激励下的动力响应。对于结构的主要部分用刚体－界面元离散，对结构的迎水面部分用有限元离散，在两种单元的交接面上设置了过渡单元，采用有限元和半无限元相结合模拟了水体的宽广性。文中导出了相关公式，编制了相应的计算程序，数值算例结果与有关文献比较，证实了提供方法和编制程序的正确性，并说明该方法具有简便，工作量少和计算精度高的优点。

A coupling method of Rigid-Body Interface Stress Element(RISE)with Finite Element (FE)is proposed.The dynamic property and response of water-retaining structural system is studied.The structure is discreted by RISE and FE,and between RISE and FE the transition element is inserted.The water-range is discreted by FE and semi-infinite element.Numerical examples show that the method is simple and efficient。