针对TBM刀群回转切削问题,建立了17寸盘形滚刀刀群切削岩石的数值仿真模型,使用有限元仿真分析软件ANSYSLS—DYNA对不同工作模式下的盘形滚刀回转切削岩石工作过程进行仿真。仿真结果表明,通过对盘形滚刀刀间距进行优化设计,分析不同刀间距下滚刀的力学参数,得到在该地质条件下,中心滚刀最优刀间距为75mm、正滚刀最优刀间距为80mm;通过对边滚刀安装角度进行优化,分析不同安装角度下滚刀的力学参数,得到边滚刀最优安装角度为6.5°;通过对滚刀切削岩石的顺次切削角度进行优化,分析不同顺次切削角度下滚刀的力学参数,得到正滚刀最优顺次切削角度为30°、边滚刀为20°。
In this paper a numerical simulation model of 17-inch disc cutter group cutting rock is established. The objective is to find the most effective rotating cutter motion of tunnel boring machines (TBM) cutter group. The process of disc cutter cutting rock in different working modes is simulated using the ANSYS LS-DYNA software application. The mechanical parameters of the hobbing cutter under different cutter spacing, different mounting angles, and different sequentially cutting angles are analyzed. Simulation results show that under the specific geological condition the optimum cutter spacing of the center cutter is 75 mm, the positive cutter is 80 mm, the optimum cutter mounting angle of the edge cutter is 6.5°, the optimum sequentially cutting angle of the positive cutter is 30°, and the edge cutter 20°.