基于microGA和有限元的混凝土坝热学参数反分析  

Back Analysis for Thermal Parameters of Concrete Dam with Micro Genetic Algorithm and Finite Element Method

作　　者：刘银芳[1,2] 陈国荣[2] 尤国英[1] 江超[3] 

机构地区：[1]中国船舶重工集团公司第七0三研究所无锡分部,江苏无锡214151 [2]河海大学工程力学系,江苏南京210098 [3]南京水利科学研究院,江苏南京210029

出　　处：《郑州大学学报（工学版）》2011年第6期63-66,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：国家重点工程资助项目(2009808415)

摘　　要：热学参数的选取,对混凝土坝温度场的计算有重要影响.这些参数值多为试验或经验公式得来,由于混凝土热学性质和外界环境的复杂性,及试验的局限性,很难得到较为精确的参数值.为解决此问题,利用微遗传算法对混凝土坝热学参数进行反分析.结合三维不稳定温度场有限元计算原理,编制了微遗传算法的三维不稳定温度场反分析程序,并给出了计算实例,结果表明:与简单遗传算法相比,微遗传算法减少了计算量,采用重启操作使种群具有很好的多样性,避免了早熟现象,更适合工程应用.The thermal parameters are obtained,which have great influence on computation of temperature field of concrete dam.Usually the parameters are obtained from test or empirical formula.Because thermal character of concrete and external environment＇s complexity and the experimental limitation,it is very difficult to obtain a more precise parameters.In order to solve the problem,in this paper,by using micro-genetic algorithm in back analysis of the thermal parameters of concrete dam,toge ther with finite element solution theory for three-dimensional transient temperature field,we worked out a back analysis program for three-dimensional transient temperature field with micro-genetic algorithm,and engineering examples are given.Result shows that micro-genetic algorithm to reduce the computation than SGA,and to restart maks the population have and ideal diversity,which to avoid the premature phenomenon.

关 键 词：混凝土 热学参数 反分析 遗传算法 

分 类 号：TU621[建筑科学—建筑技术科学] TP31[自动化与计算机技术—计算机软件与理论]