基于CEL法的土壤切削过程模拟

Simulation of Soil Cutting Process Based on CEL Method

针对有限元法模拟土壤深度切削时,部分单元容易发生较大的变形,网格扭曲严重,从而导致计算中断的现象,利用ABAQUS软件建立了土壤深度切削的有限元模型,分别采用耦合欧拉-拉格朗日法(简称CEL法)和传统的拉格朗日法模拟了土壤的深度切削过程。通过对比发现,CEL法的切削效果更好,并与实际的切削过程更为贴近,且CEL法的切削力波动小,更为平稳。研究结果对应用有限元法模拟矿山工程、道路路基等基建工程施工及农业耕作具有一定的参考价值,也提供了另一种模拟土壤切削过程的方法。

When the finite element method was used to simulate soil depth cutting, some units were prone to large deformation and thus contributed to the severely distortion of the grid, which leaded to the calculation interruption. In order to solve the problem, the finite element model of soil depth cutting was established by using ABAQUS software and the soil depth cutting process was simulated by coupling Euler-Lagrange method (CEL) and the traditional Lagrange method respectively. By comparison, it is found that the CEL method has better cutting effect and is closer to the actual cutting process. Besides, the cutting force of the CEL method has small fluctuation and is more stable. The research results can provide certain reference for the application of finite element method to simulate the construction of mine engineering, road subgrade and other infrastructure projects and agricultural cultivation, and it also provide another method to simulate soil cutting process.