Design Simulation And Optimization Of JXD-100 Multifunctional Hydraulic Pipe-Roof Rig

Pipe-roof advance support method has quickly developed in recent years as a new tunnel excavation technology in areas of weak or difficult ground, and it has been widely used all around the world because of its many advantages. Pipe-roof rig is the special equipment in the tunnel construction of pipe-roof advance support, because of its technological superiority and efficient construction, it is getting more and more extensive application in the tunnel construction. With the development of tunnel and other underground construction in our country, the demand for pipe-roof rig will be growing. There are only a few factories which can produce pipe-roof rig presently at home, however, both performance and efficiency of domestic products are badly behind foreign products. The price of pipe-roof rig imported from foreign country is very high, so the number of rigs imported is very limited, which can't completely satisfy the needs of domestic construction. Just under this background,this thesis has begun the study on pipe-roof rig.Firstly, this thesis introduces the development and research situation of the pipe-roof rig in detail at home and abroad, and then introduces the concept of virtual prototyping technology and describes its applications and advantages in modern mechanical system design and study. On the basis , JXD-100 multi-functional hydraulic pipe-roof rig as research object is introduced, and its complete set of process about mechanical system virtual prototyping in modeling, dynamic simulation and optimization of finite element analysis based on the UG,ADAMS and ANSYS are created.The major contents in this thesis are listed as follows:(1)According to the design requirements of pipe-roof rig, three design schemes of the pipe-roof rig's overall structure are presented, and the final overall structure of the pipe-roof rig is determined on comparing and analyzing. This thesis uses the UG software to build the 3D model of pipe-roof rig, and realizes the assembly of virtual prototyping, all these can make the defects checked timely in design, and provide condition and basis in the following simulation and optimization.(2)The multi-rigid-body dynamics virtual prototyping model of the driving head and rotary mechanism are established in ADAMS. Some parameters used in the gear meshing contact-impact model are obtained based on Hertz contact theory, then a series of angular speed, meshing force, the meshing frequency and other simulation datas are figured out by simulating. A good coincidence between the simulation results and the theoretic calculated results proves that virtual prototyping is reliable. Based on the reliable simulation results of the driving head model, the Influence of gear system's extrinsic and intrinsic motivation on the system dynamic response is analysed, which provides theoretical foundation for the system optimization, vibration, analysis of the life-span in the future. (3)Fully taking into account the effects of the flexible power output shaft on the driving head's performance, the modal neutral file (. MNF) of power output shaft is generated by the combination of using ADAMS and ANSYS, and then it is introduced to ADAMS. So the rigid-flexible coupling virtual prototyping model of the driving head is established, and according the simulated result the effects of the flexible shaft on the driving head's performance is discussed. Finally in ADAMS post-processing module the stress and strain of the power output shaft are analyzed, and its reliability is evaluated, and the load file (.lod) is exported.(4)Taking into account the effects of the pipe-roof rig's key parts on drilling rig's performance, the modal analysis of the power output shaft and the drill rig mast is carried out by using ANSYS software, and the drilling rig mast is optimized, a quite ideal effect of optimization is obtained .The research results above are theoretical significant for the design of pipe-roof rig and actual production. The profound study of the pipe-roof rig performance will provide important technical foundation for the technological improvements and optimization of products in the future.