TBM支撑推进机构掘进性能分析

发布时间：2018-12-17 01:19

【摘要】：全断面硬岩掘进机(Tunnel Boring Machine,简称TBM)是铁路、公路、水利、市政建设等隧道施工的重大装备,相对传统的钻爆法具有快速、优质、环保、安全等优点,已成为隧道施工的首选装备。支撑-推进-换步机构是TBM实现连续循环作业的核心传动部件,对整机掘进性能具有重要影响。本文在系统分析其机构组成与工作原理的基础上,研究了该机构具有的拓扑结构特性,然后进一步研究了机构的运动传递特性,构建了机构静力学分析模型,分析了关键构件受力,最后进行了机构的虚拟样机仿真。全文主要内容如下:首先,系统分析了支撑-推进-换步机构的拓扑结构、液压缸驱动方式及工作原理,计算了不同作业工况机构的自由度,研究了机构的拓扑特性,构建了不同工况时机构的等效拓扑构型。然后,建立了机构位置正逆解分析模型和在线调向(或轨迹纠偏)的运动学模型,推导出在线调向函数,揭示出各驱动油缸位姿参数与刀盘位姿间的映射规律,进行了纠偏轨迹的规划。其次,在构件受力合理假设的前提下,建立了护盾静力分析模型,研究了护盾处受力对鞍架、扭矩油缸和撑靴受力的影响规律;同时,建立了支撑-推进-换步系统受力分析模型,分别分析了主梁、主梁导轨、鞍架及撑靴的受力特点,揭示出各驱动油缸受力和刀盘外载间的映射关系。最后,应用商用软件Solidworks进行了机构三维实体建模和整机装配,并通过机构的运动仿真分析,验证了机构运动的合理性,采用有限元方法进行了机构的应力仿真,分析了机构关键零部件受力,为物理样机的设计提供一定借鉴。
[Abstract]:Full section hard rock tunneling machine (TBM) is a major equipment for tunnel construction, such as railway, highway, water conservancy, municipal construction and so on. Compared with the traditional drilling and blasting method, it has the advantages of fast, high quality, environmental protection and safety, etc. Has become the first choice of tunnel construction equipment. The brace-propulsive-step-changing mechanism is the core transmission component of TBM to realize the continuous cycle operation, which has an important influence on the driving performance of the whole machine. In this paper, based on the systematic analysis of the mechanism composition and working principle, the topological structure characteristics of the mechanism are studied, and then the kinematic transfer characteristics of the mechanism are further studied, and the statics analysis model of the mechanism is constructed. Finally, the virtual prototype simulation of the mechanism is carried out. The main contents of this paper are as follows: firstly, the topological structure, the driving mode and the working principle of the mechanism are analyzed, the degrees of freedom of the mechanism under different working conditions are calculated, and the topological characteristics of the mechanism are studied. The equivalent topological configuration of the mechanism is constructed under different working conditions. Then, the analysis model of forward and inverse solution of mechanism position and the kinematics model of on-line alignment (or trajectory correction) are established, and the on-line direction adjustment function is derived, and the mapping law between the position and attitude parameters of each driving oil cylinder and the position and pose of the cutter head is revealed. The program of correcting track is carried out. Secondly, the static analysis model of shield is established on the premise of reasonable force assumption, and the influence of shield force on saddle frame, torque cylinder and boot is studied. At the same time, the stress analysis model of brace-propulsive and step changing system is established, and the mechanical characteristics of main beam, main beam guide rail, saddle frame and brace boot are analyzed respectively, and the mapping relationship between the driving cylinder force and the external load of the cutter head is revealed. Finally, the three-dimensional solid modeling and assembly of the mechanism are carried out by using commercial software Solidworks, and the rationality of the mechanism motion is verified by the kinematic simulation analysis of the mechanism, and the stress simulation of the mechanism is carried out by using the finite element method. The force of the key parts of the mechanism is analyzed, which can be used for reference in the design of the physical prototype.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.31

【引证文献】