复合臂式垃圾车工作装置结构分析与优化

发布时间：2018-04-02 11:26

本文选题：复合臂式自装卸装置　切入点：数学模型　出处：《燕山大学》2016年硕士论文

【摘要】：拉臂式垃圾车是一种利用自装卸装置完成垃圾箱装卸与垃圾自卸的垃圾运送车,自装卸装置的结构性能是整车设计的关键。为提高产品竞争力,国内某工程机械集团与燕山大学进行合作,共同设计研发新型复合臂式自装卸装置。本文主要承担针对新型复合臂式自装卸装置的结构分析与优化的研究工作。本文综述了产品研发的目的、背景与用途,提出了针对新型复合臂式自装卸装置整机结构分析与优化的方法与步骤:首先分析了不同结构形式自装卸装置的结构与性能对比,建立了复合臂式自装卸装置自卸与卸箱两种运动过程的数学模型,得到两种运动过程中装置铰点力、油缸力以及箱体对装置的作用力的载荷变化,为后续的结构分析提供了载荷边界条件;其次,建立了复合臂式自装卸装置的整机参数化有限元模型,对滑块连接进行简化处理以减小计算量,通过对装置两个运动过程的全工况有限元分析,提取得到了结构关键位置在整个运动过程的应力变化曲线,从而了解装置在整个运动过程中的受力变化情况,并以此确定危险工况;然后,采用接触分析处理滑块连接,对装置在危险工况下的受力进行进一步的精确分析,并对装置在危险工况下的受力进行应力测试实验,在误差允许范围内,实验结果验证了有限元分析结果的正确性;最后,为减小装置总重,利用所建立的参数化有限元模型,在满足装置强度条件下,对装置关键部件的板厚尺寸进行优化,优化后,装置整体减重7.41%。本文的研究为新型复合臂式自装卸装置的设计研发提供了可靠的计算依据,也为CAE仿真分析技术在机械产品研发中的应用提供了思路。
[Abstract]:The pull arm garbage truck is a kind of garbage conveyer which uses the self-loading and unloading device to complete the loading and unloading of the garbage bin. The structural performance of the self-loading and unloading device is the key to the design of the vehicle.In order to improve the competitiveness of the products, a domestic construction machinery group and Yanshan University cooperate to design and develop a new type of composite arm self-loading and unloading device.This paper mainly focuses on the structure analysis and optimization of the new composite arm self-loading device.The mathematical models of the self-unloading and unloading processes of the self-loading and unloading device with composite arm are established, and the load changes of the hinge point force, the cylinder force and the force acting on the device during the two motion processes are obtained.The load boundary condition is provided for the subsequent structural analysis. Secondly, the parameterized finite element model of the composite arm self-loading device is established, and the slider connection is simplified to reduce the calculation amount.Through the finite element analysis of the two moving processes of the device, the stress change curve of the key position of the structure in the whole motion process is obtained, and the stress change of the device during the whole motion process is understood.Then the contact analysis is used to deal with the slider connection, and the stress of the device under the dangerous condition is analyzed accurately, and the stress of the device under the dangerous condition is tested.The experimental results verify the correctness of the finite element analysis results within the allowable error. Finally, in order to reduce the total weight of the device, the parameterized finite element model is used to satisfy the strength of the device.The plate thickness of the key parts of the device is optimized, and the whole weight loss of the device is 7.41.The research in this paper provides a reliable calculation basis for the design and development of a new type of composite arm self-loading and unloading device, and also provides a train of thought for the application of CAE simulation analysis technology in the research and development of mechanical products.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.691

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