【作者】 朱品昌；

【导师】 马力；

【作者基本信息】 武汉理工大学 ， 车辆工程， 2008， 硕士

【摘要】 本文以企业的实际需求为出发点,以基于整车的自卸车举升机构优化设计平台为研究对象,对优化设计平台开发全过程进行了研究。此平台开发改善了企业对液压举升机构的设计手段和方法,以快速、高效、保质、保量完成液压举升机构的优化设计,在ADAMS软件中二次开发建立起国内六种常见举升机构优化设计平台,解决了六种举升机构各铰接点布置问题。论文首先综合论述了国内外对自卸车举升机构方面的研究现状,结合项目需要,以软件开发流程为总线,对企业需求进行了全面分析,明确了优化设计平台的设计需求、功能需求、理论需求和其它需求,设计了该优化平台的功能级数据流图并对其进一步细化,同时对优化设计平台运行过程中的数据流向进行了详细研究。随后从全局高度出发,对优化设计平台总体设计过程进行详细研究,在总体设计中首先确定了平台开发方式,然后设计了平台体系结构,基本功能结构以及对各功能模块作用进行具体分析并确定优化设计平台的运行流程。基于整车的自卸车举升机构优化设计平台开发研究,须有整车的参数化模型和举升机构优化的数学模型。为此论文分别对自卸车底盘和举升机构(包括货厢)参数化展开详细的研究,在举升机构优化数学模型中确定了各优化设计变量、约束条件和优化目标。随后,论文对设计平台的具体实现进行了研究,对平台进行详细的菜单、对话框和各功能模块的设计并编写有关实现自动建模和仿真控制的程序来满足用户的某些特定要求。同时通过对完成平台进行测试,结果运行稳定,能快速完成设计作业。论文最后利用所开发的平台对典型自卸车辆仿真分析和优化设计得出:通过比较整车模型在静力学和动态仿真中油缸推力曲线变化,举升机构在正常举升情况下,动态仿真的油缸推力最大值比静力学仿真所得的油缸推力最大值大10%—15%。平台同时对举升机构进行两种优化设计,当对举升机构中各铰接点直接进行优化设计时,优化后油缸最大推力比优化前降低了20.68%,当考虑不改变三角板形状时,优化后油缸最大推力比优化前降低了12.41%。本文的研究不仅为自卸车举升机构优化设计提供了先进的工具,解决了企业的迫切需要,同时也可为同类问题研究提供良好借鉴。更多还原

【Abstract】 This paper regards actual demand of enterprise as the starting point and regards the second-development of truck lifting mechanism optimization design platform based on whole model as the research object, researched the whole process of platform. The platform changed hydraulic pressure lifting mechanism design method, rapidly, efficiency, quality assurance. The platforms for six kinds of lifting mechanism familiar in China are developed and established, and the hinged points of the six kinds are arranged with ADAMS software.Firstly, this paper describes the current domestic and foreign situation of researching in truck lifting mechanism, connect the project requirements, regards the flow (path) of software second development as bus, overall analysis demand of enterprise, and confirms design demand, function demand, theory demand and other demand of the platform. Designs dataflow of platform in function level and carries on detailed research to the data in the operation course of the platform at the same time. Subsequently, the paper stands the global point to carry on detail research to the overall design process. In process, confirms the development way of the platform at first. Then designs system architecture, basic functions model and makes a concrete analysis to the function module, provides the operation procedure of platform.Researching the platform of truck lifting mechanism optimization design based on whole mode must be have the whole parameterized truck model and lifting mechanism’s mathematical model for optimization, so the paper dentally research the truck chassis parameterized and lifting mechanism (carriage) parameterized, and confirms all kinds of design variable, constraint condition, optimization object.Afterwards, the paper researches how to design the platform concrete, designs the menu, dialog and function modules, and provides the realization codes of automatic build the whole truck model and simulation control to satisfaction of customer demanding. After several experiment, the result indicates that the platform runs steadily, its can quickly finish the lifting mechanism design. Finally, the typical truck is simulated, analyzed and optimization designed with the developed platform. By means of which the curves displaying thrust changing separated from static and dynamic simulation on whole model, it’s found that the maximum dynamic thrust is 10%-15% more than the static’s while the lifting mechanism being normal. At the same time, two different optimization designs about lifting mechanism are carried out. The maximum thrust is induced by 20.68% compared to the initial condition with all the joints being considered, when the maximum thrust is only induced by 12.41% compared to the initial condition while without changing the triangular shape.The research of this paper has not merely offered an advanced tool for enterprise, solved the problem of enterprise, at the some time, it provides a good reference to solve the similar problem.更多还原