Research On Function Simulation Of The Open Face And Rock Tunnel Boring Machine Based On Digital Prototyping Technology

Digital Prototyping technology combines computer simulation technology, the virtual reality technology and three-dimensional graphics technology. The digital virtual prototyping can be applied into product design and development, performance testing, manufacturing simulation, application simulation results analysis, product optimization process. With the technology, we establish a finite element in the computer to carry on the finite element simulation. We establish a virtual model of the mechanical system in a computer to simulate the kinematics and dynamics and other characteristics of the reality environment. Several softwares can be used for co-simulation with their own advantage.Tunnel boring machine (TBM), is the major technologies tunnel construction equipment with a highly intelligent, combines mechanical, electrical, hydraulic, light, computer technology as one. TBM has a high degree of automation, high construction speed, good construction quality, labor-saving features. In today's society with a growing number of tunnel projects, TBM will get rapid development. In order to guarantee the design quality, eliminate the design time, reduce the design expenses, the digital prototyping technology are applied to design tunnel boring machine during the study process.The study object of this article is Germany Wirth TB803E type open-face and hard rock tunnel boring machine. The main content of this article is divided into roughly divided into the following three parts.The first part, we built a finite element model by using the ABAQUS software, based on the existing rock breaking theory and the finite element analysis methods. By changing the value of several parameters including the cutter spacing, cutting speed and the disc cutter wear radius to study their affection to the effects of rock breaking. Compare the simulation value with the the theoretical value according to the formula of Colorado School of Mines, to study on the variation of the data, and the data obtained were fitted to verify the reasonableness of the model.The second part, the establishment of the 3D digital prototype model of TBM was accomplished in the PRO/E software by taking advantage its capabilities. Then the model was imported into the ADAMS software. We set the parameters in accordance with the working process of the TBM, and make the dynamic simulation to study the relationship of the thrust and speed and the relationship of the drive torque and angular velocity of cutter head.The third part, using the ADAMS and MATLAB/Simulink to make the dynamics and control co-simulation fot the digital prototyping and using PID control strategy to study the performance of the control for thrust-velocity. By changing the value of the first thrust and setting steady-state velocity to study the variation of the velocity response curves. Under the condition of setting steady-state velocity jump, we study the variation of the velocity response curves, to provide appropriate and reliable reference for the operation of TBM in reality.The article adopted the digital prototyping technology to the rock breaking and relevant simulation of the open-face and hard rock TBM, got corresponding conclusions.