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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.
Aiming at the current situation that the mechanical parameters of materials determined by in-situ or in-situ tests are greatly deviated from the actual parameters in geotechnical engineering, the self-developed intelligent back analysis program based on elasto-plastic finite element method and differential evolution (DE) In the inversion of mechanical parameters of tunnel surrounding rock and foundation, the principle, steps and implementation process of the program are introduced, and the variation factors F, crossover factors CR and difference strategies in differential evolution algorithm are used to analyze the accuracy of parameter inversion and the iterative convergence rate The results show that the inversion method has good reliability and good optimization performance, and has a wide range of applications.