【作者】 王宇；

【导师】 张维强；

【作者基本信息】 南京农业大学 ， 机械工程， 2014， 硕士

【摘要】 中国参与全球物流的机会和程度在逐步增加,但运输方式和运输装备仍然落后,运输市场存在恶性和无序的竞争。我国正处于经济结构调整的关键时期,运输行业面临机遇与挑战。半挂车是公路运输的主要工具之一,在社会、经济及节能环保等因素的推动下,近年得到了迅速的应用和发展。虽然国内半挂车产品已经在技术方面有了很大进步,但与国外同型车辆相比,仍有很大差距。如何加快发展的速度、提高半挂车设计及生产的科技水平,是中国半挂车运输行业面临的难题。在滁州恒信工贸有限公司的支持下,以牵引车型号为SX4256的16米低平板半挂车车架为研究对象,通过阅读大量参考文献,利用现代机械设计方法、Solid Works及ANSYS Workbench软件进行研究,主要内容如下：(1)了解半挂车的整体结构、运输承载要求、市场需求及相应性能参数；通过CAD图纸获取车架结构尺寸,利用Solid works建立车架的三维实体模型,按照简化原则及承载要求对其进行简化处理。(2)将车架实体模型导入ANSYS Workbench14.0,选取弯曲工况和扭转工况作为车架静力学分析的对象,得到相应的应力云图及位移云图。检验了车架各处的强度及刚度,找出了不合理位置,为车架的优化提供了依据。(3)对车架进行模态分析,得到在自由模态下的固有频率值及相应振型图,分析车架后十阶的变形趋势,防止车架发生共振。(4)对车架进行拓扑优化分析,找出可去除材料的部分,使得车架的材料分布更合理。选取纵梁腹板厚度及横梁1的尺寸进行优化,根据生产实践选取最优解,重新建立车架模型并进行分析,验证结果的合理性。更多还原

【Abstract】 The opportunities and degree of participation in the global logistics of China is increasing, but the mode and equipment of transport is still backward. There is a vicious and disorderly competition in the transportation market. Now China is in a critical period of economic restructuring and the transportation industry faces opportunities and challenges. Under the promotion of social, economic, energy conservation and environmental protection, semi-trailer, the main tool of load transport has been applied and developed rapidly in recent years. Although domestic trailer products have made great progress in terms of technology, there is a big gap between domestic and foreign trailer products. So how to accelerate the pace of development, and improve the technology level of the semi-trailer are key problems faced by Chinese semi-trailer transport industry.Supported by the Chuzhou HengXin industry and trade co.Ltd, the SX4256 16-meter low flatbed semi-trailer is analyzed in this paper, by using modern mechanical design method, Solid Works and ANASYS Workbench software and a lot of references. The main contents are as follows.(1) On the basis of the overall structure, market demands, transport and load requirements and related performance parameters of semi-trailer, the solid model is built in Solid Works according to structure parameters obtained from CAD drawings and simplified in accordance with simplifying principle and bearing requirements.(2) The frame model is imported to ANS YS Workbench to carry out static analysis and obtain the stress contours and deformation contours of the frame in both reversing and bending conditions. The strength and stiffness are verified by the static analysis results and the unreasonable location of frame are found, which provide the basis for the optimization design of the frame.(3) Natural frequencies and corresponding vibration modes are obtained by using ANSYS Workbench to do the modal analysis of the frame. The resonance can be prevented by analyzing the deformation of the frame.(4) Based on the topology optimization results, the removable areas on the frame are identified and the reasonable distribution of beams is obtained. The results make the material distribution of the frame more reasonable. The thickness of longitudinal beam and the parameters of beam are selected as design variables to complete optimization design and the optimization solution is selected and handled according to engineering practice. The modal of frame is built in Solid Works by selecting new size parameters, and then it is imported to ANSYS Workbench to verify the reasonableness of the results.更多还原