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引入全局寻优的微分演化算法,集成并行算法和有限元数值计算方法,提出并改进了微分演化并行有限元的优化反分析方法。利用这种方法可以进行有限元正算与岩体参数反演的综合分析,也可以根据现场实测位移数据进行位移反分析,识别工程岩体的力学参数。利用MPI并行平台,在构建的多台PC并行环境中进行了并行有限元参数位移的微分演化反演。算例表明该方法可行,而且明显提高了反演计算的速度与精度。
The differential evolution algorithm, the integrated parallel algorithm and the finite element numerical method of global optimization are introduced, and the optimal inverse analysis method of differential evolution parallel finite element method is proposed and improved. This method can be used to carry out a comprehensive analysis of positive definite finite element analysis and in-situ inversion of rock mass parameters. It can also perform back analysis of displacement based on field measured displacement data to identify the mechanical parameters of engineering rock mass. Using MPI parallel platform, differential evolution inversion of parallel finite element parametric displacements was carried out in the multi-PC parallel environment. The example shows that the method is feasible, and the speed and precision of inversion calculation are obviously improved.