三维弹性自适应有限元及其在拱坝分析中的应用  

Adaptive 3-D finite element method and its application in arch dams

作　　者：杨强[1] 翟明杰[1] 周维垣[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《水力发电学报》2006年第3期62-66,共5页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(50279016);973课题(2002cb412708)资助项目

摘　　要：本文将自适应有限元用于拱坝,应用ZZ后验误差估计方法以及h-型自适应策略,对典型的悬臂梁和拱坝进行三维线弹性自适应有限元计算。计算结果表明,本方法可有效提高计算精度和计算效率,特别是对于具有应力集中的结构,具有显著的效益。The adaptive FEM is discussed and applied to arch dams in this paper. The estimating method of Zienkiewicz-Zhu posteriori error and corresponding h-version adaptive strategy are firstly presented, and the linear elastic adaptive finite element computation is applied to a typical 3-D cantilever and arc dams. Numerical results show that this method can effectively improve the accuracy and efficiency of computation especially for the structure with stress concentration.

关 键 词：水工结构 后验误差估计 自适应有限元 容许误差限 拱坝 

分 类 号：TV31[水利工程—水工结构工程]