隧道检测设备专用搭载车车身骨架设计与有限元分析

发布时间：2018-01-03 11:25

本文关键词：隧道检测设备专用搭载车车身骨架设计与有限元分析　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：我国在建和已经投入使用的隧道越来越多，为了保证隧道的安全使用，必须要运用先进的红外线扫描技术对隧道情况进行检测。目前在检测时配套使用的全站仪搭载车全部来自于国外进口，而国产搭载车的研究开发是一个空白。论文以某国外公司的公路测量行走车为参考样本，在国外样车的基础上合作设计与开发了隧道检测设备专用搭载车，建立了搭载车车身骨架的有限元模型。针对搭载车正常工作时的匀速直线行驶、急速转弯、紧急制动以及通过路面路障时某轮抬高这四种典型工况,利用NASTRAN软件分析计算了车声骨架在相应工况下的应力分布和位移变形，进行了车身骨架的强度和刚度分析，并通过分析车架的前十阶自由模态，得到了车架的固有频率和相应振型。论文研究结果表明，，在各典型工况下车架的强度和刚度均可满足设计要求。车架结构的最大应力发生在车架顶部的前端突出部与顶部车身框架横纵梁的交汇处，但所受应力均远低于车身骨架材料的极限强度；在搭载车通常工作的工况下，车身骨架各部分变形量不大；搭载车在B级或者C级路面上匀速行驶时，摄像部位位移变化量极小，对扫描成像后的图像清晰度不会产生不良影响。最终产品达到了客户的设计使用要求。
[Abstract]:More and more tunnels are under construction and have been put into use in our country, in order to ensure the safe use of tunnels. It is necessary to use the advanced infrared scanning technology to detect the tunnel situation. At present, the total station vehicles used in the detection are all imported from abroad, but the research and development of domestic pick-up vehicles is a blank. Based on the reference sample of a foreign company, the paper designs and develops a special pick-up vehicle for tunnel detection equipment on the basis of foreign sample vehicles. The finite element model of the frame of the vehicle is established. Aiming at the four typical working conditions of the vehicle, such as uniform straight running, rapid turning, emergency braking and a wheel raising when passing through the road roadblock. The stress distribution and displacement deformation of the vehicle acoustic skeleton under the corresponding working conditions are analyzed by using NASTRAN software. The strength and stiffness of the body skeleton are analyzed, and the first ten free modes of the frame are analyzed. The natural frequencies and the corresponding vibration shapes of the frame are obtained. The results show that. The strength and stiffness of the frame can meet the design requirements under various typical conditions. The maximum stress of the frame structure occurs at the intersection of the front end of the frame top and the cross longitudinal beam of the top body frame. But the stress is much lower than the ultimate strength of the body skeleton material. Under the normal working condition of carrying vehicle, the deformation of each part of the body skeleton is not large; The displacement of the camera position is very small when the vehicle is traveling at a uniform speed on the B or C level road, which will not have a bad effect on the image clarity after scanning and imaging. The final product meets the requirements of the customer's design and application.
【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】：U456;U469.6

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