面向直升机抗坠毁的新型夹心八边形蜂窝设计、仿真和理论研究

王佳铭; 李志刚; 梁方正; 刘婉婷; 廖就; 陈芳育; 李萌; 邵特立

doi:10.7527/S1000-6893.2021.25244

航空学报 >

2022 , Vol. 43 >Issue 5: 225244 - 225244

DOI: https://doi.org/10.7527/S1000-6893.2021.25244

固体力学与飞行器总体设计

面向直升机抗坠毁的新型夹心八边形蜂窝设计、仿真和理论研究

王佳铭 ,
李志刚 ,
梁方正 ,
刘婉婷 ,
廖就 ,
陈芳育 ,
李萌 ,
邵特立

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1. 北京交通大学机械与电子控制工程学院, 北京 100044;
2. 中国直升机设计研究所, 景德镇 333001;
3. 中国空间技术研究院钱学森空间技术实验室, 北京 100094;
4. 交控科技股份有限公司, 北京 100070

收稿日期: 2021-01-11

修回日期: 2021-03-18

网络出版日期: 2021-04-27

基金资助

北京市自然科学基金（L201010，L212024）

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Design, simulation and theoretical study on novel cored octagon honeycomb for helicopter crashworthiness

WANG Jiaming ,
LI Zhigang ,
LIANG Fangzheng ,
LIU Wanting ,
LIAO Jiu ,
CHEN Fangyu ,
LI Meng ,
SHAO Teli

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1. School of Mechanical, Electronic and Control Engineering, Beijing Jiao Tong University, Beijing 100044, China;
2. China Helicopter Research and Development Institute, Jingdezhen 333001, China;
3. Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China;
4. Traffic Control Technology Co., Ltd., Beijing 100070, China

Received date: 2021-01-11

Revised date: 2021-03-18

Online published: 2021-04-27

Supported by

Beijing Natural Science Foundation(L201010, L212024)

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摘要

提出了一种吸能更加优秀的新型夹心八边形蜂窝。首先，建立了可快速预测夹心八边形蜂窝轴向压缩平台应力的理论模型，并对八边形和内嵌四边形蜂窝边长的变化对平台应力以及相对密度的影响进行了预测。然后，通过六边形蜂窝轴向压缩试验和仿真对比，验证了蜂窝建模和仿真方法的正确性；在建模方法和模型验证的基础之上，建立了新型夹心八边形蜂窝的有限元模型，分析了其变形模式以及边长参数对蜂窝吸能能力的影响，验证了理论模型的正确性。此外，进行了夹心八边形蜂窝和六边形、正方形蜂窝吸能能力的对比分析，结果表明新设计的夹心八边形蜂窝具有一定的吸能优势。最后，进行了直升机驾驶舱简化模型和夹心八边形蜂窝的耦合跌落仿真，定性分析了夹心八边形蜂窝的吸能能力。发现该蜂窝相较六边形蜂窝更适用于吸能能力要求高的场合，本文研究结果可以为新型蜂窝缓冲结构的设计提供依据。

关键词： 夹心八边形蜂窝; 仿真分析; 理论模型; 蜂窝参数; 吸能

本文引用格式

王佳铭 , 李志刚 , 梁方正 , 刘婉婷 , 廖就 , 陈芳育 , 李萌 , 邵特立 . 面向直升机抗坠毁的新型夹心八边形蜂窝设计、仿真和理论研究[J]. 航空学报, 2022 , 43(5) : 225244 -225244 . DOI: 10.7527/S1000-6893.2021.25244

Abstract

A novel cored octagon honeycomb with better energy absorption capacity was proposed in this study. First, a theoretical model was established to rapidly predict the platform stress of the cored octagon honeycomb under axial crush. Based on the theoretical model, the influence of the side length of the cored octagonal honeycomb and the embedded square honeycomb on its platform stress and relative density was predicted. In addition, the three-dimensional finite element models of hexagonal honeycombs were developed and simulated under axial crush. The simulation results are validated against the experimental results. Afterwards, on the basis of the validation via the modeling method, the finite element model of the novel cored octagon honeycomb was established, and then the deformation mode and effect of honeycomb geometric parameters on its energy absorption capacity were analyzed based on simulation. The theoretical model was compared with the simulation, exhibiting high accuracy. Meanwhile, the energy absorption capacity between the cored octagon honeycomb and hexagonal and square honeycombs was compared, revealing the advantages of the designed cored octagon honeycomb over common hexagonal and square honeycombs. Finally, the coupled drop simulation of the simplified helicopter cockpit model and the cored octagon honeycomb was conducted. The results of the qualitative analysis show that the cored octagon honeycomb is more suitable for the occasion with high energy absorption capacity requirements than the hexagonal honeycomb. This study can provide new insights into the design of new honeycomb structures.

Key words： cored octagon honeycomb; simulation analysis; theoretical model; honeycomb parameters; energy absorption

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