TBM双刃滚刀破岩过程模拟研究

Simulation Research on Rock Breaking Process of TBM Double Disc Cutter

采用ANSYS/LS-DYNA对TBM双刃滚刀破岩过程进行动态掘进仿真和动力学分析。根据济南R2线工程地质和TBM设备参数,建立双刃滚刀-岩石三维模型,通过对双刃盘形滚刀不同刀刃宽度、不同贯入度进行仿真,分析双刃滚刀受力情况,并与CMS模型对比,研究TBM双刃盘形滚刀刀刃宽度、贯入度在破岩过程中的影响。通过分析结果表明:当双刃滚刀贯入度在5~7 mm时,比耗能较小,对应双刃滚刀破岩效率较高;在贯入度定值下,随着刀刃宽度增加,侧向力与滚刀破岩力随之增加,刀刃宽度在16~20 mm时对应的破岩效率较高。通过分析双刃盘形滚刀破岩特征,对深入研究盘形双刃滚刀优化设计提高破岩效率具有重要的工程价值。

The rock breaking process of TBM double disc cutter is simulated and analyzed by the finite element software ANSYS/LS-DYNA.According to the engineering geology of Jinan R2 line and the parameters of TBM equipment,a three-dimensional model of Double disc cutter-rock is established.Through the simulation of different blade widths and penetration degrees of double disc cutter,the force situation of double disc cutter is analyzed,and compared with the CMS model,to study the influence of the blade widths and penetration degree of TBM double-edged disc hob on the process of rock breaking.The analysis results show that when the penetration of double disc cutter is 7 mm,the specific energy consumption is smaller and the corresponding rock-breaking efficiency of double disc cutter is higher;when the penetration is fixed,the lateral force and rock-breaking force of the double disc cutter increase with the increase of the blade width,and the corresponding rockbreaking efficiency is higher when the blade width is 16-20 mm.By analyzing the rock breaking characteristics of double disc cutter,it is of great engineering value to research the optimization design of double disc cutter and improve the rock breaking efficiency.