摘要
针对岩土工程中通过室内或现场原位试验确定的材料力学参数均与实际参数有较大偏差的现状,将自主开发的基于弹塑性有限元与差异进化算法(DE)的智能反分析程序应用于隧道围岩及地基的力学参数反演中.介绍了程序原理、步骤及实现过程,并分析了差异进化算法中变异因子F、交叉因子CR及差异策略对参数反演精度与迭代收敛速度的影响.研究结果表明,该参数反演方法具有较好的可靠性和良好的优化性能,具有广泛的应用前景.
Abstract
Specific to the status quo of geotechnical engineering that there is larger deviation between the material mechanics parameters determined indoor or in situ test and practical parameters, the independently developed intelligent back analysis program was applied to back analyze the mechanical parameters of surrounding rock and foundation based on the elasticplastic finite element and difference evolutionary(DE) algorithm. The principle, steps and implementation process were introduced, and the influences of the mutagenic factor F, the cross factor CR and the difference strategy on the precision and convergence speed of the back analysis were analyzed. Result shows that the proposed parameter inversion method has good reliability and optimal capability, which has wide application prospect.
关键词
岩土工程 /
材料力学 /
参数 /
反分析 /
反演精度 /
收敛速度 /
差异进化算法
Key words
geotechnical engineering /
mechanics of materials /
parameters /
back analysis /
inversion accuracy /
velocity of convergence /
difference evolutionary algorithm
塔 拉,姜谙男,王军祥,关 文.
基于差异进化算法的岩土力学参数智能反分析[J]. 大连海事大学学报. 2014, 40(3): 131-135
Tala,JIANG An-nan,WANG Jun-xiang,GUAN Wen.
Intelligent back analysis of mechanical
parameters based on difference [J]. Journal of Dalian Maritime University. 2014, 40(3): 131-135
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基金
大连市交通科技项目(2011-10);吉林省交通厅交通运输科技项目(2012-1-6);辽宁省科学事业公益研究基金资助项目(2013003003)