地下管道挖掘机内刀盘掘进参数研究

Research on Tunneling Parameters of Inner Cutter in the Underground Pipeline Excavator

研究刀盘与界面耦合作用下的动态载荷是刀盘设计的基础,应用ABAQUS/Explicit有限元分析模块对地下管道挖掘机内刀盘的切削过程进行了仿真分析,采用扩展的线性Drucker-Prager本构模型作为土体模型,使用物理分离准则与单元剪切失效模拟土壤的分离。对内刀盘参数设计的合理性及其对结果的影响进行了分析,同时模拟了不同地质条件下内刀盘的载荷随时间的变化情况,仿真结果能够真实的反应内刀盘受力情况且为后续刀盘结构设计与优化打下了坚实基础。

The fundamental problem for the design of cutter is the dynamic load during tunneling process. In this paper, the ABAQUS/Explicit dynamic finite element analysis module was used to analyze the cutting process of underground pipeline ex- cavator, the extended linear Drucker-Prager plastic model was used as a finite element model of soil, and shear failure of the soil was simulated with the physical separation criterion and separation of the unit. The rationality of designed parameters of the inner cutter and influence on the results were analyzed, and the changes over time of the inner cutter load under different geological conditions were also simulated. And the simulation results can feedback the real reaction of the inner cutter and pro- vide a solid theoretical basis for the follow-up design and optimization.