并行遗传算法对硅藻软岩本构关系的求解

Creating constitutive model of diatomaceous soft rock using parallel genetic algorithm

利用并行遗传算法,基于不同条件下软岩三轴压缩实验的实验数据,对正常固结领域和超固结领域硅藻软岩的本构关系进行了拟合,建立了一种新的考虑时间效应的应力-应变-时间本构模型。预测结果分析表明,所建模型很好地反映了硅藻软岩的本构关系,从而验证了该模型并行遗传算法解的合理性和可行性。研究成果在地下空间的利用和开发中具有良好的应用前景,对介于岩石和土之间复杂软岩材料力学特性研究的进一步发展具有重要的参考价值。

On the basis of experimental data of triaxial compression in different conditions, a stress-strain-time constitutive model was created through the learning procedure by using genetic algorithm which ran in the parallel computing environment. The predicted results which were obtained through the created model indicate that this model is well in accord with the constitutive model of diatomaceous soft rock. This method, which creates a constitutive model by using genetic algorithm, has a vigorous foreground in the rock and soil mechanics. It provides a new approach for the further research of constitutive models.