梁下轨行式桥梁检测车的结构设计与分析

发布时间：2018-12-09 11:49

【摘要】：摘要：我国的高速铁路具有桥梁比例大,高架长桥多的特点,而且新型的高速铁路桥梁桥面变窄,两侧已无走行便道。同时线路还具有运营密度大、封闭性强、检测维修时间受限的特点。所有这些,一方面导致高铁桥梁的维护问题变得更加严峻,一方面又导致现有的桥梁检测设备及手段无法适应当前高速铁路桥梁的检测作业需求。因此,亟待开发根据我国高速铁路桥梁技术衍生的检测设备。本文通过调研国内外各种类型的桥梁检测设备,以及铁路桥梁检测作业的任务要求,根据我国高速铁路桥梁的特殊结构形式,提出了一种适用于高架桥梁的梁下轨行式检测车的结构设计方案,并对方案进行了论证分析。论文以机械结构设计技术和虚拟样机技术为基础,开展了以下研究内容：(1)确立整车结构的设计方案,包括走行机构,作业平台结构、回转装置、配重机构、动力设备等的设计选型内容；(2)利用Autodesk Inventor软件构建数字样机模型,为静力学、动力学研究提供原始数据模型；(3)利用ANSYS Workbench软件对结构关键部件进行静力学分析,校验结构的强度和刚度,优化方案的选择；(4)对检测车的桁架结构进行模态分析,分析结构的振动特性,为预防共振和抵抗疲劳破坏提供可靠的理论依据；(5)利用Autodesk Inventor的运动仿真模块对检测车结构进行运动仿真,分析结构的动力学特性,检验检测车的工作性能。设计和分析结果表明：检测车的结构设计功能有效地满足了检测任务的要求；检测车的关键零部件的力学性均达到了相关设计标准的规定；根据结构的固有振动特性,可避免检测车运用过程中发生共振危险；检测车运行时的动态稳定性能满足设计要求,车体不会发生倾覆危险；检测车结构的设计及选型合理。
[Abstract]:Absrtact: the high-speed railway in our country has the characteristics of large proportion of bridges and many long viaducts, and the bridge deck of the new high-speed railway bridge becomes narrow, and there are no running sideways on both sides. At the same time, the line also has the characteristics of high operation density, strong closure and limited inspection and maintenance time. On the one hand, the maintenance of high-speed railway bridges becomes more serious; on the other hand, the existing bridge detection equipment and means can not adapt to the current high-speed railway bridge detection needs. Therefore, it is urgent to develop the detection equipment derived from the bridge technology of high-speed railway in China. In this paper, according to the special structure of high-speed railway bridges in China, we investigate various kinds of bridge detection equipment at home and abroad, as well as the task requirements of railway bridge detection. In this paper, a structure design scheme of beam-bottom rail detection vehicle suitable for elevated bridge is put forward, and the scheme is proved and analyzed. Based on the technology of mechanical structure design and virtual prototyping, the following research contents are carried out in this paper: (1) establishing the design scheme of the whole vehicle structure, including the running mechanism, the working platform structure, the rotary device, the counterweight mechanism, and so on. The design and selection of power equipment; (2) Autodesk Inventor software is used to construct the digital prototype model, which provides the original data model for statics and dynamics research. (3) ANSYS Workbench software is used to analyze the key components of the structure, to check the strength and stiffness of the structure, and to select the optimal scheme. (4) the modal analysis of the truss structure of the inspection vehicle is carried out, and the vibration characteristics of the structure are analyzed, which provides a reliable theoretical basis for the prevention of resonance and the resistance to fatigue failure; (5) the motion simulation module of Autodesk Inventor is used to simulate the structure of the detecting vehicle, the dynamic characteristics of the structure are analyzed, and the performance of the detecting vehicle is tested. The results of design and analysis show that the structural design function of the inspection vehicle meets the requirements of the inspection task effectively, and the mechanical properties of the key parts of the inspection vehicle meet the requirements of the relevant design standards. According to the inherent vibration characteristics of the structure, the resonance hazard can be avoided during the operation of the detection vehicle; the dynamic stability performance of the detection vehicle meets the design requirements, and the vehicle body will not overturn the danger; the structure design and selection of the detection vehicle is reasonable.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U446.3

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