隧道车车架有限元分析及优化设计

发布时间：2018-07-09 19:35

本文选题：隧道车车架 + 有限元　；参考：《石家庄铁道大学》2017年硕士论文

【摘要】：铁路隧道车用于铁路运营隧道的病害类型、病害机理以及检测和整治技术,为既有隧道的日常维护和病害整治提供可靠的硬件设备基础。隧道车需要经常工作在恶劣环境中,需要承载复杂载荷,车架作为隧道车的重要部件之一,其他零部件均安装其上,而且承受着路面的振动和承载物的载荷。因此,在隧道车的设计中对车架进行有限元分析和优化设计是十分重要的。本文首先使用SolidWorks软件建立车架结构的三维几何模型,然后基于ANSYS/Workbench有限元分析软件建立隧道车车架力学模型,对车架进行强度、刚度分析,获得不同工况条件下车架的应力分布云图和相关数据;根据有限元分析结果,利用Workbench软件,以车架最大应力为目标函数,以侧梁工字钢中间厚度和横梁工字钢中间厚度为参数变量,对车架进行了基于响应面法的结构可靠性优化。优化后的车架结构应具有良好的动力学特性,为此进行了车架的模态分析,结果表明车架低阶固有频率大于路面激励频率,避免了共振。最后对隧道车车架的疲劳寿命进行仿真分析,通过Adams和nCode Design-life分别得出载荷谱与疲劳曲线,在此基础上使用疲劳分析模块Fatigue tool进行寿命分析,得出疲劳寿命结果。同时以寿命云图的形式显示出车架容易坏的部位,为隧道车的设计和改进提供了参考。
[Abstract]:The railway tunnel car is used in the railway tunnel operation of the disease type, disease mechanism, detection and remediation technology, which provides a reliable hardware equipment foundation for the daily maintenance and repair of the existing tunnel. Tunnel vehicle needs to work in bad environment and bear complex load. As one of the important parts of tunnel vehicle, the other parts are installed on it, and bear the vibration and load of the road. Therefore, it is very important to analyze and optimize the frame in the design of tunnel vehicle. In this paper, the three-dimensional geometric model of frame structure is established by SolidWorks software, and then the mechanical model of tunnel frame is established based on ANSYS / Workbench finite element analysis software, and the strength and stiffness of frame are analyzed. According to the results of finite element analysis and the Workbench software, the maximum stress of the frame is taken as the objective function. Taking the intermediate thickness of I-beam steel and the intermediate thickness of I-beam steel as parameter variables, the reliability optimization of frame based on response surface method is carried out. The optimized frame structure should have good dynamic characteristics. The modal analysis of the frame shows that the low order natural frequency of the frame is higher than the excitation frequency of the road and the resonance is avoided. Finally, the fatigue life of tunnel frame is simulated, and the load spectrum and fatigue curve are obtained by Adams and nCode Design-life, respectively. On this basis, fatigue tool is used to analyze the fatigue life, and the fatigue life result is obtained. At the same time, the life cloud diagram is used to show the easily damaged parts of the frame, which provides a reference for the design and improvement of the tunnel vehicle.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U216.6;U457.4

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