Strength Test Technique for Large Amphibious Aircraft Landing Gear

doi:10.7652/xjtuxb202007002

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Strength Test Technique for Large Amphibious Aircraft Landing Gear

更新时间：2025-07-09

- Strength Test Technique for Large Amphibious Aircraft Landing Gear
- Vol. 54, Issue 7, Pages: 9-16+157(2020)
- 作者机构：
  
  中国飞机强度研究所全尺寸飞机结构静力/疲劳航空科技重点实验室,西安,710065
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202007002
  CLC： V216.1
- Online First：10 July 2020，
  
  Published：2020
- 稿件说明：
移动端阅览
Strength Test Technique for Large Amphibious Aircraft Landing Gear[J]. 2020, 54(7): 9-16+157.
DOI：

Strength Test Technique for Large Amphibious Aircraft Landing Gear[J]. 2020, 54(7): 9-16+157. DOI： 10.7652/xjtuxb202007002.

摘要

针对大型水陆两栖飞机起落架的超静定连接及高支柱结构所带来的试验问题

基于刚度等效理论采用数值仿真方法分别对起落架与机身连接和与试验装置连接模型进行分析

通过调整试验装置结构形式、尺寸及厚度等

实现起落架装置连接模型对机身连接模型在变形主方向位移的模拟; 基于数值仿真的力学边界条件模拟

计算主起落架轮轴中心点在最大载荷时的位移

预先调整加载点安装位置以保证最大载荷时的加载精度。试验结果表明

在机尾下沉着陆最大回弹载荷内外轮分配比例为6:4的工况下

轮轴中心点主变形方向的位移基本相同

两种连接方式各向载荷最大误差在7%左右。研制了集模块化、多功能和通用性于一体的机身刚度模拟自平衡试验装置

满足了主起落架8种工况的静强度试验需求

可为其他型号起落架试验提供参考。

Abstract

To solve the test problems caused by the statically fixed connection and high pillar structure of large amphibious aircraft landing gear

based on the stiffness equivalence theory

two models of landing gear connected with fuselage and connected with test device were analy-ed by numerical simulation method. By optimi-ing the structural form

si-e and thickness of the test device

the displacement of landing gear-device connection model in the main direction of deformation was simulated according to that of the landing gear-fuselage connection model. Based on the numerical simulation of mechanical boundary condition

the displacement at the center point of the main landing gear shaft under the maximum load was calculated

and the installation position of the loading point was adjusted in advance to ensure the loading accuracy under the maximum load. The results showed that under the maximum resilience load condition(the load ratio of inner wheel to outer wheel is 6:4)for the tail subsid

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references

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