铰接式共振破碎机整车动力学研究

发布时间：2018-03-29 10:52

本文选题：共振道路破碎机　切入点：铰接式车架　出处：《武汉理工大学》2014年硕士论文

【摘要】：铰接式共振道路破碎机是用于对发生断裂、损伤的水泥混凝土路面进行破碎改造的道路工程机械。它利用共振原理以等于或者接近水泥混凝土板块的频率不断敲击水泥混凝土道路，使水泥混凝土板块发生局部共振，敲击的能量在水泥混凝土板块内积蓄，致使板块的振幅不断地增加，最后发生断裂，达到破碎效果。这一技术不仅能很好的完成对水泥混凝土道路的改造，而且节约成本，施工效率高，对环境的破坏小，在当前面临大范围路面改造的中国有着非常巨大的市场。本文基于共振道路破碎机的研究与开发项目，对所设计的铰接式共振破碎机的整车动力学进行研究。结合CAD/CAE技术以及虚拟样机技术，运用振动力学、多刚体运动力学等理论，对共振破碎机工作过程的所涉及的共振系统、车身等部件进行静力学以及动力学方面的仿真研究。本文以铰接式共振破碎机的共振系统、整车为分析对象，全文可以分为六章。第一章介绍论文研究的来源与背景，共振破碎机当前的应用与研究状况，论文的主要研究内容与方法。第二章阐述了共振碎石化的工作机理，，对设计的铰接式共振破碎机的各主要部件结构进行了说明。第三章建立了共振系统简化模型，推导了其运动微分方程。利用有限元技术对共振梁进行了动力学仿真分析，得到了共振梁的模态分析结果，并依此结果确定了共振梁的节点位置，建立了共振梁的模态中性文件。第四章建立了前后车架振动分析简化模型，推导了前、后车架的两自由度的运动微分方程，得到了前、后车架振动模型在竖直方向和侧倾方向上的固有频率和阻尼比。建立了车架的刚柔耦合动力学模型，对车架的动力学响应进行了仿真分析，得到了前、后车架在各激励输入下的频率响应。第五章建立了整车动力学模型，对整车动力学模型进行仿真分析，主要考虑发动机激励和共振系统在42~53Hz频率段内的激励，得到了整车各部件在竖直方向上与侧倾方向上的振动响应。第六章对论文进行了工作总结，指出了本文的不足之处，为后续的工作提供了方向性意见。本文利用计算机仿真分析对共振破碎机的整车动力学进行了初步的研究，得到了共振破碎机的振动响应特性，为后续整车的试制与试验分析提供了参考。
[Abstract]:The articulated resonant road crusher is used to break on the ground. The damaged cement concrete pavement is broken and modified by road engineering machinery. It uses the resonance principle to strike the cement concrete road at a frequency equal to or close to the cement concrete slab, making the cement concrete slab produce local resonance. The energy of percussion is accumulated in the cement concrete plate, which causes the amplitude of the plate to increase continuously, and finally breaks, and achieves the effect of breaking. This technique can not only complete the reconstruction of the cement concrete road, but also save the cost. The construction efficiency is high and the damage to the environment is small. Based on the research and development project of the resonant road crusher, the whole vehicle dynamics of the articulated resonant crusher is studied in this paper. Combined with CAD/CAE technology and virtual prototyping technology, the theory of vibration dynamics, motion mechanics of multi-rigid body and so on are used. The resonant system, body and other components involved in the working process of the resonant crusher are simulated in the aspects of statics and dynamics. This paper takes the resonance system of the articulated resonant crusher as the object of analysis, and the whole paper can be divided into six chapters. The first chapter introduces the origin and background of the research, the current application and research status of the resonant crusher. The main contents and methods of this paper. In chapter 2, the working mechanism of resonance lithotripsy is described, and the structure of the main components of the articulated resonant crusher is explained. In chapter 3, the simplified model of resonance system is established. The differential equation of motion is derived. The dynamic simulation analysis of the resonant beam is carried out by using finite element technique, and the modal analysis results of the resonant beam are obtained, according to which the position of the node of the resonant beam is determined. The modal neutral file of the resonant beam is established. In chapter 4, the simplified model of the vibration analysis of the front and rear frame is established, and the differential equations of motion of the front and rear frame are derived. The natural frequency and damping ratio of the rear frame vibration model in the vertical direction and the roll direction. The rigid-flexible coupling dynamic model of the frame is established, and the dynamic response of the frame is simulated and analyzed. In chapter 5, the dynamic model of the whole vehicle is established, and the dynamic model of the whole vehicle is simulated and analyzed, mainly considering the excitation of the engine and the resonance system in the frequency range of 42~53Hz. The vibration responses of all parts of the vehicle in vertical direction and roll direction are obtained. Chapter 6 summarizes the work of this paper and points out the shortcomings of this paper. In this paper, the dynamics of the whole vehicle of the resonant crusher is studied by computer simulation analysis, and the vibration response characteristics of the resonant crusher are obtained, which provides a reference for the subsequent trial production and experimental analysis of the whole vehicle.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U415.5

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