仿竹设计在无人机起落架结构中的应用

赵知辛; 郭强; 黄鸣远; 刘家良

doi:10.13433/j.cnki.1003-8728.20200565

仿竹设计在无人机起落架结构中的应用

doi: 10.13433/j.cnki.1003-8728.20200565

陕西理工大学机械工程学院，陕西汉中　723000

基金项目: 陕西省科技厅重点研发计划项目（2019GY-068）与陕西省教育厅专项科研计划项目（16JK1147）

详细信息

作者简介:
赵知辛（1973−），讲师，博士，研究方向为有限元分析，49989803@qq.com

中图分类号: V226⁺.1
计量
- 文章访问数: 91
- HTML全文浏览量: 52
- PDF下载量: 6
- 被引次数: 0
出版历程
- 收稿日期: 2020-12-27
- 刊出日期: 2021-11-05

Application of Imitation Bamboo Design in Unmanned Aerial Vehicle Landing Gear Structures

School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong 723000, Shaanxi, China

摘要

摘要: 应用于无人机的滑撬式起落架多使用弓形梁结构，几何特征上梁是一种细长弹性体，与竹子结构（具有较大细长比）相似。为了提高滑撬式起落架的结构性能，首先参考竹子的微观结构，设计了三种类维管束的仿生圆管，采用有限元法对仿生管轴向与径向碰撞吸能进行了仿真与计算；其次通过有限元静力学与动力学分析，对比了原结构与仿竹结构在相同载荷下的力学性能。仿真结果表明：静力学分析中，仿竹结构的最大应力相较于原结构降低约44%，并改善了弓形梁与滑筒连接处应力集中现象；动力学分析通过多工况模拟了起落架可能出现的平稳着陆与非平稳着陆，采用仿竹结构多工况的最大应力平均降低约22%，有效地提升了着陆性能。
- 滑撬式起落架 /
- 仿竹设计 /
- 吸能特性
Abstract: The skid landing gear used in UAV often uses bow beam structure, and the upper beam is a kind of slender elastic body, which is similar to bamboo structure (with large slenderness ratio). In order to improve the structural performance of skid landing gear, First of all, refer to the microstructure of bamboo, three kinds of bionic circular tubes with similar vascular bundles are designed, the axial and radial collision energy absorption of bionic tube are simulated and calculated by finite element method; secondly through the finite element static and dynamic analysis, the mechanical properties of the original structure and the bamboo-like structure are compared under the same load. The simulation results show that in the static analysis, the maximum stress of the imitation bamboo structure is reduced by about 44% compared with the original structure, and the stress concentration at the joint between the bow beam and the sliding cylinder is improved. The possible smooth landing and non-smooth landing of the landing gear is simulated through multi-operating conditions in the dynamic analysis, and the maximum stress under multiple operating conditions of the bamboo-like structure is reduced by about 22% on average, it shows that the bamboo-like structure can effectively improve the landing performance.
- skid landing gear /
- imitation bamboo design /
- characteristics of energy absorption

HTML全文

图 1 竹子微观截面

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图 2 仿生截面

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图 3 轴向冲击特性曲线

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图 4 径向冲击特性曲线

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图 5 冲击特性曲线

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图 6 起落架结构图

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图 7 设计结构

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图 8 有限元静力学分析云图

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图 9 动力学分析结果对比图

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图 10 竹节结构

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表 1 材料属性

材料	泊松比	密度/ (g·cm⁻³)	弹性模量/GPa	屈服极限/MPa
6063铝	0.33	2.7	68	170
20CrMo钢	0.3	7.85	205	685

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