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土体流动往往会造成工程结构物的严重破坏。针对目前常用计算方法在进行土体流动非线性极大变形研究中存在局限性的现状,建立了一种纯拉格朗日、无网格的流体动力学计算方法—光滑质点流体动力学(Smoothed Particle Hydrodynamics,简称SPH)方法,采用Bingham流体模型对土体流动大变形过程进行了模拟研究。通过土体流动构型及流动冲击力的模型试验和数值模拟结果对比分析,验证了SPH数值模拟方法的准确性,从而实现了这种先进高性能计算方法在岩土工程领域的成功应用。
Soil flow often causes serious damage to the structure of the project. Aiming at the current limitations of the commonly used computational methods in studying the nonlinear deformation of soil, a purely Lagrangian and meshless hydrodynamic calculation method is established, namely Smoothed Particle Hydrodynamics (SPH for short), the Bingham fluid model was used to simulate the large deformation process of soil. The accuracy of the SPH numerical simulation method is verified by comparing the model test and the numerical simulation results of the soil flow configuration and the flow impact force, so as to achieve the successful application of this advanced high performance calculation method in the geotechnical engineering field.