库-坝耦合振动的弹粘塑性p型自适应有限元法  

Elasto-viscoplastic dynamic analysis of reservoir-dam coupling system using p-version adaptive FEM

作　　者：费文平[1] 李永红[2] 陈胜宏[1] 

机构地区：[1]武汉大学水利水电学院,湖北武汉430072 [2]长江水利委员会设计院,湖北武汉430010

出　　处：《长江科学院院报》2003年第1期36-39,共4页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金资助项目(59979021);教育部骨干教师基金资助项目

摘　　要：库-坝的耦合振动研究一直是大坝抗震分析的重要内容,也是工程设计的重要依据。采用p型自适应有限元法,建立了三维弹粘塑性模型,提出了适合p型有限单元法的误差估计方法,实现了动力响应分析的自适应升阶过程。计算结果表明:p型有限元法不仅前处理少,而且具有计算精度高和收敛速度快的优点,对求解库水-坝体的耦合振动问题是可行的和高效的;考虑耦合作用后,结构的安全系数将有所降低。Reservoir-dam coupling vibration research, especially elasto-viscoplastic behavior research is a major content of dam earthquake-resistance analysis and is very important to engineering design. A 3D elasto-viscoplastic dynamic analysis model is built for reservoir-dam coupling system by using p-version adaptive FEM. An error estimating method is put forward for the p-version FEM, by which an adaptive process of dynamic response is implemented. The computation result shows that the p-version adaptive FEM is efficient and quick-convergence with less preprocessing. This method is feasible and reliable for solving reservoir-dam coupling vibration problems. The safety coefficient will be reduced after considering coupling behaviors between reservoir and dam.

关 键 词：耦合振动 弹粘塑性 p型有限元 坝体 水库 

分 类 号：TV312[水利工程—水工结构工程]