某起落架收放试验故障分析及间隙影响分析

王钰龙; 魏小辉; 印寅; 宋晓晨; 倪华近

doi:10.13433/j.cnki.1003-8728.2015.0235

某起落架收放试验故障分析及间隙影响分析

doi: 10.13433/j.cnki.1003-8728.2015.0235

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

基金项目:

国家自然科学基金项目（51075203）、国家自然科学基金项目（51105197）及江苏高校优势学科建设工程项目资助

详细信息

作者简介:
王钰龙（1989-），硕士研究生，研究方向为飞行器起落装置设计，wangyulong_nuaa@163.com

通讯作者:
魏小辉，副教授，weixiaohui@nuaa.edu.cn

计量
- 文章访问数: 138
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- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2013-05-09
- 刊出日期: 2015-02-05

Failure Analysis and Gap Impact Analysis of a Landing Gear's Extension-retraction Test

1.
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016

摘要

摘要: 为了分析某型飞机前起落架在收放试验中出现试验件变形、机构卡滞的问题，结合试验现象，对整个机构进行载荷分析，得出机构故障机理，即关键传力部件之间存在间隙。在理论分析的基础上进行ADAMS多刚体动力学分析，对主要受力构件进行有限元分析，随后从制造误差和装配误差两个方面分析运动副间隙可能的取值范围，进而进行运动副含间隙情况下起落架机构卡滞位置的载荷分析，分析结果表明：装配误差导致的运动副间隙使得关键传力部件后拉杆出现8.31 mm变形，最大应力达到1 220 MPa，已超过材料的屈服极限，使得结构变形、机构传力路径改变进而导致机构卡滞。
- 起落架 /
- 收放机构 /
- 运动副间隙 /
- ADAMS /
- 有限元分析
Abstract: The nose landing gear of a certain aircraft had some problems of deformation and clamping stagnation during extension-retraction tests. This study was carried out to analyze these problems. First, the load of the entire mechanism was analyzed combining the experimenting phenomenon. It was concluded that the gaps between key load transmission components lead to these mechanism faults. On the basis of theoretical analysis, the multi-rigid body dynamic analysis using ADAMS and the finite element analysis of the main members bearing load were carried out. The possible range of gap value was analyzed according to errors in manufacturing and assembly. And then, the load analysis of the landing gear mechanism was done in the case that the kinematic pair had gaps and the landing gear was stuck. From the analysis, the following results are concluded. The kinematic pair gaps caused by assembly errors render 8.31 mm long deformation on the primary load-transfer component, the rear bar. The maximum stress is up to 1 220 MPa, which has exceeded the yield limit and causes the mechanism deformation and the change of the load transmission route. It's the reason why the mechanism is stuck.
- assembly /
- computer simulation /
- computer software /
- deformation /
- dynamics

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参考文献(13)

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