Simulation Study on Rock Breaking by TBM Disc Cutter Based on FEM-SPG Coupling
During the tunnel construction process,the rock is broken under the action of rock breaking force of TBM disc cutter,which cannot be explored by traditional finite element method(FEM).The smooth particle galerkin(SPG)analysis method was introduced to solve the problem of mesh distortion and failing to rock fracture analysis at the same time with FEM,and the disc cutter rotary cutting rock model was established by coupling FEM and SPG.The results show that the FEM-SPG method can effectively demonstrate the dense core crushing process of rock and the phenomenon of slag splashing.By comparing and verifying with the CSM model,it is found that the vertical force obtained from the simulation has an error of 1.8%compared with the CSM model,which verifies the reliability of the model.This method and model can provide new ideas for the study of accurate rock breaking by cutter and the analysis of rock breaking mechanism.
TBM disc cutterrock breaking forcerotary cutting rock modelFEM-SPG
NETL
NSTL
万方数据
