Simulation Analysis Of TBM Of Cutterhead System Load And Dynamic Characteristic Based On ADAMS

TBM （Tunnel Boring Machine）is an advanced tunnel construction machinery whichdrives the rotary tools to excavate rock and to form the whole cross section of a tunnel. Asone of the key components of TBM, cutter head plays a very important role in rockexcavation and stabilizing the working face. The efficiency of the shield tunneling isdependent on the working performance of the cutter head. In this paper rigid-flexiblecoupling simulation analyses were carried out for the TBM cutter head during breakingrock based on ADAMS. The load and dynamic characteristics of the TBM cutter head wereinvestigated in order to provide the theoretical support to the save and stable operation withweaker vibration. The main aspects of the research in this paper are listed as follows.In order to study the dynamic behavior of the TBM cutter head during the tunnelingconstruction, the working face was designed as curved surfaces with sockets and beads. Therigid model of cutter head and working faces with different sockets and beads wereestablished by means of UG. Then the simulation calculations were conducted afterimporting these fitted models into ADMAS. The curves of contact force and acceleration onthe every rolling cutter were obtained. Comparison studies were conducted between thecurves with different height of beads. The results show that the height of the breaking rockdoes affect the smoothness of operation. When the height of the breaking rock varies from8to12mm, the cutter head operates the most smoothness on the working face with9mm ofheight of bead.To evaluate the effects of the flexibility of the rock on the behavior of the TBM cutterhead, the rigid model of the flat working face was soften as deformable in ANSYS. Thenthe rigid model of cutter head and the soften model of working face were imported intoADAMS to carry out the simulation calculation. The varying curves of the contact forceswere obtained on every rolling cutter. The results show that the cutter head operates moresmoothly after taking into the flexibility of the rock.To investigate the effects of the breaking of the flexible rock on the dynamic behaviorof the cutter head, the model of flexible working face with sockets and beads and the modelof one rolling cutter were input into ADAMS. The simulation calculation was performedand the varying curves of the contact forces were drawn. The effects of the property of the rock on the rolling load were analyzed.To evaluate the effects of the flexibility of the cutter head on the dynamic behavior ofthe TBM, the rigid model of the cutter head was soften as deformable. Then the model ofsoften cutter head and the model of rigid working face were imported into ADAMS tocarried out the simulation calculation. The varying curves of the contact forces wereobtained on every rolling cutter. The corresponding results were compared with those fromthe model of flexible working faces.