• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (10): 142-150.doi: 10.3901/JME.2019.10.142

• 运载工程 • 上一篇    下一篇

窗型多壁结构的耐撞性研究

何宁, 张勇, 陈腾腾, 林继铭, 徐翔   

  1. 华侨大学机电及自动化学院 厦门 361021
  • 收稿日期:2018-06-04 修回日期:2018-12-12 出版日期:2019-05-20 发布日期:2019-05-20
  • 通讯作者: 张勇(通信作者),男,1980年出生,教授。主要研究方向为轻质材料的耐撞性研究。E-mail:zhangyong@hqu.edu.cn
  • 作者简介:何宁,男,1994年出生。主要研究方向为先进机械与车辆优化设计。E-mail:364644660@qq.com;陈腾腾,男,1994年出生。主要研究方向为先进机械与车辆优化设计。E-mail:1013123777@qq.com
  • 基金资助:
    国家自然科学基金(51675190)、福建省高等学校新世纪优秀人才计划和华侨大学研究生科研创新基金资助项目

Crashworthiness Study of Window Multi-wall Structure

HE Ning, ZHANG Yong, CHEN Tengteng, LIN Jiming, XU Xiang   

  1. College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021
  • Received:2018-06-04 Revised:2018-12-12 Online:2019-05-20 Published:2019-05-20

摘要: 具有高效吸能特性的薄壁结构已被广泛应用于各种运载工具中,但传统单壁结构存在易陷入全局弯曲的不稳定吸能模式。因此,提出一种窗型多壁结构,并采用试验测试、仿真分析与理论预测相结合的方法,详细研究了窗型多壁结构、均匀方形多胞结构与方形三壁结构在轴向载荷作用下的吸能特性。研究结果表明:窗型多壁结构比同质量的另外两种结构具有更高的吸能效率。同时,窗型多壁结构的几何参数(壁厚T、内层壁边长D,壁间距比N)对结构的耐撞性能有显著影响。并且,基于超折叠单元理论开发了窗型多壁结构的理论模型,该模型能较好的预测窗型多壁结构的平均碰撞力与吸能特性,并采用数值分析结果与理论预测结果的对比来验证了理论预测模型的可靠性。研究结果对开发新颖的轻量化薄壁吸能结构提供了良好的指导与理论支撑。

关键词: 仿生设计, 海藻酸钠, 空心圆管, 氯化铁, 三维打印, 生物支架, 超折叠单元, 多壁结构, 理论预测, 能量吸能

Abstract: Thin-walled structures have been widely used in various delivery vehicles due to high energy absorption performance, but single-wall structures easily suffer global bending and cause unstable energy absorption mode. Therefore, a window multi-wall structure is proposed to improve the energy absorption of single wall structures. The energy absorption characteristics of the window multi-wall structure, uniform multi-cell square structure and square three-wall structure are detail investigated under axial loading by experimental testing, simulation analysis and theoretical prediction. The results show that the window multi-wall structure has higher energy absorption efficiency than other two structures of the same mass. At the same time, the geometric parameters, such as wall thickness T, inner wall side length D and wall spacing ratio N, have a significant effect on crashworthiness of the window multi-wall structure. Furthermore, a theoretical model of the window multi-wall structure is developed to predict the mean crushing force and energy absorption of the window multi-wall structure based on super folding element theory. The reliability of the theoretical model is validated by comparing numerical results with theoretical solutions. The research findings offer a good guidance and theoretical support for development a novel thin-walled energy absorption structures.

Key words: 3D Printing, Biological scaffold, Biomimetic design, Ferric chloride, Microtube, Sodium alginate, energy absorption, multi-wall structure, super folding element, theoretical prediction

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