基于ABAQUS有限元分析软件，采用ALE算法和线性Drucker-Prager土体塑性本构模型，利用具有单元删除功能的剪切失效准则，建立盾构切刀切削土体的三维仿真模型，研究不同切削参数条件下刀具切削土体过程中土屑的流动状态和刀具切削力的变化规律。研究结果表明： 在不同的切深状况下，总的切削力变化并不大，但随着切深的增大，已切削土屑的分离度降低甚至不分离；随着刀宽的增大，切削力也随之增大，但土屑的流动性降低；随着前角的增大，切屑的破碎状态和流动性降低，导致堆积在切刀的刀刃处，阻碍切削的持续进行。

A threedimensional simulation model of soil cutting by shield cutter is established by means of ALE algorithm, linear DruckerPrager constitutive model and shear failure criterion with mesh deletion function based on ABAQUS software. The soil flow state and cutting force under different cutting parameters are studied. The study results show that: 1) The cutting force varies a little with the cutting depth varies; and the soil separating rate decreases with the cutting depth increases. 2) The cutting force increases and the soil flowability decreases with the cutter width increases. 3) The soil flowability decreases with the front angle increases.