某起落架收放联动机构故障分析及改进设计

中国机械工程 ›› 2014, Vol. 25 ›› Issue (3): 399-403.

某起落架收放联动机构故障分析及改进设计

魏小辉1，2;王钰龙2;印寅2;聂宏1，2;倪华近2

1.南京航空航天大学机械结构力学及控制国家重点实验室，南京， 210016
2.南京航空航天大学飞行器先进设计技术国防重点学科实验室，南京， 210016

出版日期:2014-02-10 发布日期:2014-02-07
基金资助:
国家自然科学基金资助项目（51105197，51075203）；江苏高校优势学科建设工程资助项目

Failure Analysis and Improved Design of a Landing Gear Retraction Mechanism

Wei Xiaohui1,2;Wang Yulong2;Yin Yin2;Nie Hong1,2;Ni Huajin2

1.State Key Laboratory of mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing,210016
2.Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics & Astronautics,Nanjing,210016

Online:2014-02-10 Published:2014-02-07
Supported by:
National Natural Science Foundation of China（No. 51105197，51075203）

摘要/Abstract

摘要：

结合某起落架收放试验中出现的收放机构变形卡滞问题，分析了机构受载情况并得出了机构故障机理。分别利用ADAMS和LMS virtual.lab建立了起落架刚柔耦合模型，采用刚柔耦合动力学仿真方法分析了装配间隙对结构变形的影响。研究表明，机构设计造成的附加弯矩和装配间隙是造成收放机构变形卡滞的主要原因。提出了改进设计方案并进行了刚柔耦合仿真验证分析。结果表明：新方案很好地解决了机构中传动部件受力不合理的问题，且关键部件的变形也减小到不足0.05mm，解决了该收放机构的变形卡滞问题。

关键词: 起落架, 收放机构;刚柔耦合;动力学

Abstract:

During the tests of a landing gear, the retraction mechanism got stuck due to the serious mechanism deformation. Aiming at this problem, the mechanism's load conditions were analyzed and the failure causes were obtained. The rigid-flexible coupling models were established using ADAMS as well as LMS virtual. lab. By the rigid-flexible coupling dynamics simulation method, it is concluded that how the assembling gap affects the mechanism deformation. The study shows that the main reason why the mechanism got stuck is the additional moment caused by the origin design and the assembling gap. An improved design scheme was proposed and analyzed by the rigid-flexible coupling method. The following results were concluded. The new scheme can solve the unreasonable stress problem on the transmission parts. The key components' deformation was also reduced to less than 0.05mm, which solves the clamping stagnation problem.

Key words: landing gear, retraction mechanism, rigid-flexible coupling, dynamics

中图分类号:

V226

魏小辉, 王钰龙, 印寅, 聂宏, 倪华近. 某起落架收放联动机构故障分析及改进设计[J]. 中国机械工程, 2014, 25(3): 399-403.

Wei Xiaohui, Wang Yulong, Yin Yin, Nie Hong, Ni Huajin. Failure Analysis and Improved Design of a Landing Gear Retraction Mechanism[J]. China Mechanical Engineering, 2014, 25(3): 399-403.

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