摘要
针对隧道掘进机(tunnel boring machine,TBM)刀盘设计过程中盘形滚刀布局的刀间距和贯入度问题,综合岩石力学、弹塑性力学和断裂力学,并运用有限元方法建立了TBM刀盘滚刀的动态破岩三维模型.通过与线切割实验对比验证了模型的正确性和有效性,并在此基础上分析了滚刀的回转破岩,得到刀间距和贯入度对滚刀切削力及比能的影响规律.结果表明:随着刀间距的增加,滚刀所受法向力将会逐渐增大,而其切向力基本保持不变,比能增加先减小后变大,在刀间距为60 mm附近取得最小值;法向力和切向力随着贯入度的增加而增大,比能随着贯入度增加而减小.
In order to solve the problems concerning the cutter space and penetration degree in the disc cutter layout during the cutter head design of tunnel boring machine （TBM）, a three-dimensional dynamic rock breaking model for TBM disc cutter was established through combining the rock mechanics, elastic-plastic mechanics and fracture mechanics as well as adopting the finite element method （FEM）. The validity and effectiveness of the model was verified by comparing with the linear cutting machine （LCM） test. Based on the model, the rotary rock breaking performance of the cutter was analyzed, and the influence of cutter space and penetration degree on the cutting force and specific energy of the cutter was obtained. The results indicate that with increasing the cutter space, the normal force of the cutter will gradually increase, while the rolling force basically remains constant. In addition, the specific energy will firstly decrease and then increase, and will reach the minimum value when the cutter space is about 60 mm. With increasing the penetration degree, both normal force and rolling force will increase, but the specific energy will decrease.
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2014年第1期51-56,共6页
Journal of Shenyang University of Technology
基金
国家自然科学基金资助项目(51275339)
关键词
隧道掘进机
盘形滚刀
拉伸损伤
等效塑性应变
贯入度
刀间距
法向力
切向力
比能
tunnel boring machine
disc degree
cutter space
normal cutter
tensile damage
equivalent plastic strain
penetration force
rolling force
specific energy
