飞机起落架仿真技术与飞机地面载荷计算.pdf

学校代码学校代码 10699 分分 类类 号号 V21 密密 级级 学学 号号 036190689 题目题目飞机起落架仿真技术与 飞机地面载荷计算 飞机起落架仿真技术与 飞机地面载荷计算 作者侯 赤 作者侯 赤 学科、专业 载运工具运用工程 指 导 教 师 万 小 朋 学科、专业 载运工具运用工程 指 导 教 师 万 小 朋 申请学位日期 2006 年 3 月 申请学位日期 2006 年 3 月 西北工业大学硕士学位论文 摘 要 I 摘 要 摘 要 飞机起落架是飞机结构的重要组成部分， 长久以来在我国的飞机起落架设计和飞机地面载荷计算领域一直沿用传统的理论计算方法， 这不仅要求研究人员能够准确的建立系统的分析模型， 还要求他们具备很强的编程能力以求解分析所得的系统动力学微分方程组， 这种方法不仅费时费力， 而且计算精度也得不到保证，因此这种方法已经不能满足现代飞机起落架设计的需求 随着计算机技术的发展， 以 CAD/CAE 技术为支撑起落架现代设计逐步得到发展并已经在具体型号的研制中得到应用，尤其是以 ADAMS 为代表的虚拟样机技术软件的出现，使得过去繁杂的动力学分析和求解过程变得简单起来，本文从 ADAMS 软件的介绍出发，将虚拟样机技术引入到飞机起落架的动力学分析中去。

详细地论述了在 ADAMS 下建立仿真模型和进行仿真分析的过程，以求利用准确而高效的仿真技术代替传统的理论计算，并且在 ADAMS 提供的仿真平台上开展了关于飞机起落架仿真技术的研究和飞机地面载荷的仿真计算方法研究，为飞机起落架系统动力学分析提供了一条新的途径 进行起落架地面载荷计算和缓冲器缓冲性能分析，首先在 ADAMS 下建立了起落架的全机仿真模型和起落架的落震试验仿真模型， 然后利用所建立的模型进行了多种着陆和滑跑工况下飞机地面载荷的计算以及起落架落震试验的仿真，计算分析了起落架缓冲器的缓冲性能及其影响因素，最后将 ADAMS 和 Matlab联合仿真技术引入到主动控制起落架缓冲性能的研究分析中， 利用主动控制系统对缓冲器参数进行调节以改善缓冲器的缓冲性能， 并分析了主动控制系统对缓冲器缓冲性能的改善作用 通过以上这些研究，本文最后得出结论：应用基于 ADAMS 的飞机起落架仿真技术可以方便地进行起落架系统的动力学分析以及飞机地面载荷计算， 提高了起落架设计效率和精度，而且这种技术能够降低起落架产品的开发费用，大大地推进了我国飞机起落架设计现代化的进程 关键词：关键词：飞机起落架缓冲器；虚拟样机技术；地面载荷；ADAMS；主动控制起落架 西北工业大学硕士学位论文 摘 要 II ABSTRACT ABSTRACT The aircraft landing gear system is a very important constituent part of the aircraft structure. However the mainly method used these years in china for the designing of landing gear and the analysis of the impact force between the landing gear and the ground keep the same way which is called a traditional equation-based method. To use this method, the researcher must face the difficulties both from the analysis of the landing gear’s mathematic mode and from the dynamic differential equations’ solving problem, and sometime this will take a lot of time and a large number of money. Because of this, the old method can not satisfy the new requirement from modern aircraft landing gear system’s designing anymore. With the computer technique’s new development, the modern design technique of aircraft landing gear based on CAD/CAE has become mature and been applied in the designing of some aircrafts which has come out for military or civil use. Especially the use of the software named ADAMS make the procedure of the dynamic analysis and calculation of the landing gear mode not so cmplex anymore. This thesis has given some detailed illustration of ADAMS first, and then the procedure of the simulation mode’s building up and the simulating analysis are particularly discussed to introduce the Virtual Prototyping Technology which is usually used for the mechanism dynamic analysis to the designing of the aircraft landing gear. Through this way, the complicated dynamic calculation can be replaced by the new simulating technique, which is convenient and has more accuracy. With this new technique, the research about the simulating technique based on ADAMS and the simulating calculation for the landing gear’s ground impact force have been successfully carried out in this thesis and because of it’s so many advantages, this way is considered as a new modern way for aircraft landing gear’s design. As to carry out the calculation of the landing gear’s ground impact force and the analysis of the shock absorber’s performance, firstly, the full aircraft Virtual Prototyping mode and the landing gear’s drop test Virtual Prototyping mode have been established here. Secondly, with these modes, the ground impact force of the landing gear and the performance of the landing gear’s shock absorber can been studied. Finally, the performance of the shock absorber with an active control system, 西北工业大学硕士学位论文 摘 要 III which controls some key parameter of the active control landing gear, has been investigated by the simulation technique based on the ADAMS and the Matlab toolbox using together. At the last of this thesis, the conclusion can be given that the new simulating technique’s application in aircraft landing gear’s design can make the dynamic analysis of the landing gear more convenient and the calculation of the landing gear’s impact force more precisely. Beside this, the new technique won’t cost so much and can improve the modern level of our aircraft landing gear’s designing. Keyword: landing gear shock absorber; Virtual Prototyping Technology; ground impact force; ADAMS; active controlled landing gear 西北工业大学硕士学位论文 目 录 I 目 录 目目 录 目 录录 ............................................................................................................................................ I 摘摘 要要 ............................................................................................................................................ I ABSTRACT....................................................................................................................................II 第一章第一章 绪绪 论论 ....................................................。