摘要
针对传统有网格有限元方法在研究土壤水射流冲击时的精度不足问题,提出了一种具有含水率信息的土壤流固耦合数值计算建模方法,并依据此方法建立一个土壤水射流冲击数值计算模型分析土壤在水射流冲击下的演化过程,通过与实验对比,改进模型可以有效的模拟土壤在水射流冲击作用下的动力学行为,很好地解决了传统有限元方法在处理土体大变形时产生的网格畸变问题。分析了含水率对土壤抗水射流冲击的影响关系。分析对比了不同直径水射流对土壤冲蚀坑直径形成的影响,确定了它们之间的内在关系,具有一定的工程应用指导意义。
Aiming at the inaccuracy of the traditional finite element method in studying the impact of soil water jet, a modeling method of soil fluid-structure interaction with moisture content information was proposed, and a numerical model of soil water jet impact was established to analyze the process of soil under water jet impact by the method. Compared with experiments, the improved model can effectively simulate the dynamic behavior of soil under water jet impact and the mesh distortion problems of traditional finite element method in dealing with large deformation of soil mass was solved. The relationship between moisture content and resistance of soil under water jet impact was analyzed. The influence of different diameter water jets on soil erosion was analyzed and compared, and the inherent relationship between them was determined, which is quite useful in guiding engineering application.
引文
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