大体积混凝土结构仿真应力分析快速算法及应用  

Fast algorithms for stress analysis simulating construction process of massive concrete structures and applications

作　　者：林绍忠[1] 苏海东[1] 

机构地区：[1]长江科学院,湖北武汉430010

出　　处：《长江科学院院报》2003年第6期19-22,26,共5页Journal of Changjiang River Scientific Research Institute

基　　金：水利部水利科技开发基金项目(SJ9645)

摘　　要：用有限元法进行模拟大体积混凝土结构施工过程温度应力仿真分析时,计算规模大,计算步数多,计算工作量十分庞大。为提高计算速度,从减少自由度数和加快有限元方程组的求解速度两方面分别提出了超级元算法和改进的对称逐步超松驰预处理共轭梯度法(SSOR-PCG法),并简单介绍了这两种快速算法及所开发的三维有限元仿真计算程序在三峡工程中的两个应用实例。The finite element method is a general algorithm for thermal stress analysis simulating construction process of massive concrete structures, but spends much computation. In order to reduce the computation, a super finite element method for decreasing the freedoms and an improved iterative format of the symmetric successive over relaxationpreconditioned conjugated gradient method(SSORPCG) for accelerating solution of equilibrium equations of the finite element method were proposed. These two fast algorithms are briefly introduced and the applications of the 3DFEM program based on them to the Three Gorges Project are presented.

关 键 词：大体积混凝土结构 仿真应力 温度应力 超级元法 SSOR—PCG法 三维有限元 

分 类 号：TV331[水利工程—水工结构工程]