【作者】 郑家坤；

【导师】 于兰英；

【作者基本信息】 西南交通大学 ， 驱动技术与智能系统， 2008， 硕士

【摘要】 液压挖掘机是一种应用广泛、功能多样、结构复杂的建设施工机械。随着挖掘机市场竞争的不断加剧,其产品的开发速度及其可靠性日益成为最具挑战性的因素。由于新产品开发周期长、成本高、设计手段落后而导致我国传统工程机械行业缺乏市场竞争力。逐渐成熟的虚拟样机技术为实现新产品的快速开发,提高我国工程机械产品的设计水平和市场竞争力提供了强有力的手段。本文将虚拟样机技术引入到液压挖掘机的设计开发过程中,并主要从以下几个方面进行研究:1.首先介绍了虚拟样机技术的基本理论,回顾了虚拟样机技术和液压挖掘机在国内外的研究现状和发展趋势,论述了将虚拟样机技术应用于液压挖掘机设计的必要性。2.在分析了液压挖掘机整机系统组成以及工作装置的设计要求与方法的基础上,依据虚拟样机技术的基本理论,利用UG、MATLAB、ADAMS软件对液压挖掘机进行设计和仿真。3.探讨了UG软件与ADAMS软件之间的数据传输途径以及应用ADAMS软件建立了液压挖掘机的运动学与动力学仿真模型。通过对挖掘机在复合动作作业方式下的力学特性分析,建立了对称载荷工况下的动力学模型,进行了仿真分析。4.基于现代设计方法,利用ADAMS软件对液压挖掘机工作装置的连杆机构进行优化设计。在铲斗液压缸闭锁力一定的情况下,分析得出了铲斗发挥最大挖掘力的最佳传动比。更多还原

【Abstract】 Hydraulic excavator is a widely used, versatile, complex structure of the construction machinery. With the growing competition in the market, it is increasingly becoming the most challenging factor of the product development speed and reliability. Because of long development cycle of new products, high cost, backwardness design methods, it is lack of market competitiveness of china’s traditional construction machinery industry. Gradually mature virtual prototype technology to realize the product fast development, enhanced the design level and the market competitiveness of our country construction machinery product has provided the powerful method. This paper will introduce virtual prototype technology into hydraulic excavator design and development area, mainly aspects are studied as follows:Firstly, introduced virtual prototype technology’s basic theory, recalled the virtual prototype technology and hydraulic excavators in the research situation and development trends and will be discussed that it is need of using virtual prototype technology in the design of the hydraulic excavator.Secondly, according to the basic theory of virtual prototype, proceeded to design and simulation about hydraulic excavator based on MATLAB, UG, ADAMS software in the analysis of the hydraulic excavator all components and design requirements and methods of equipment.Thirdly, discussed the data transmission channels between UG and ADAMS software, worked out the method to establish kinematics and dynamics simulation model using ADAMS software, established the dynamics model in symmetrical load conditions based on analysis of the excavator operations in the compound action of mechanical properties, and processed to simulation analysis.Finally, optimized the hydraulic excavator equipment linkage in the software ADAMS based on modern design method, and studied the best transmission ratio exerting the biggest digging force in the bucket of the hydraulic cylinder atresia certain circumstances.更多还原