CAJ | 학술논문

刀盘是岩石隧道掘进机（ TBM）开挖岩石的关键部件，通过试验或者现场施工数据得到其与围岩的相互作用规律极为困难。利用数值模拟方法，在ABAQUS／Explicit环境下建立了模拟刀盘掘进的三维分析模型。采用扩展的Drucker?Prager非线性弹塑性模型作为岩体的本构模型；应用包含单元删除功能的损伤失效准则模拟切屑的形成及分离，并基于显式积分算法实现了TBM刀盘掘进全物理过程的直接数值模拟，得到了刀盘的动态掘进载荷以及掌子面岩体的损伤失效状态。仿真结果表明：对于所选定的岩石力学参数，当推进距离达到8．5 mm时，掌子面岩体全面损伤，刀盘进入稳定掘进阶段；在掘进过程中，刀盘载荷波动剧烈，其第1阶主频约为刀盘转动频率的2倍。上述模拟方法可以为TBM掘进过程的分析提供有效的工具。
도반시암석수도굴진궤（ TBM）개알암석적관건부건，통과시험혹자현장시공수거득도기여위암적상호작용규률겁위곤난。이용수치모의방법，재ABAQUS／Explicit배경하건립료모의도반굴진적삼유분석모형。채용확전적Drucker?Prager비선성탄소성모형작위암체적본구모형；응용포함단원산제공능적손상실효준칙모의절설적형성급분리，병기우현식적분산법실현료TBM도반굴진전물리과정적직접수치모의，득도료도반적동태굴진재하이급장자면암체적손상실효상태。방진결과표명：대우소선정적암석역학삼수，당추진거리체도8．5 mm시，장자면암체전면손상，도반진입은정굴진계단；재굴진과정중，도반재하파동극렬，기제1계주빈약위도반전동빈솔적2배。상술모의방법가이위TBM굴진과정적분석제공유효적공구。
A cutter head is the critical component of a tunnel boring machine ( TBM) . It's very difficult to under?stand the interaction between the cutter head and rocks only by means of experiments or the on?site data in the tun?neling. In this paper, a three?dimensional computational model for the excavation process of TBM cutter head was established using the ABAQUS/Explicit module. The extended Drucker?Prager elastoplastic model was used as the constitutive model to describe the material nonlinearity of the rock. The progressive damage and failure rules invol?ving element deleting function were used to simulate the formation and separation of cutting scraps. The direct nu?merical simulation of TBM cutter head tunneling was realized using the explicit integration algorithm to obtain the dynamic excavating loads and the damage state on the tunneling face during the whole physical process. Results show that for the selected rock mechanical parameters, damage occurs on the whole working face and the cutter head comes into the stable excavating stage when the thrust distance reaches 8. 5mm. The loadings on the cutter head fluctuate sharply during the tunneling process, and their first?order frequency is twice the one of rotation. The study indicates that the numerical method may be an effective tool to simulate the excavation process under TBM working conditions.