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兵工学报 ›› 2023, Vol. 44 ›› Issue (3): 682-690.doi: 10.12382/bgxb.2022.1009

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气凝胶夹芯结构冲击吸能实验研究

李泽昊1,2(), 徐文龙1(), 王成3(), 贾时雨3(), 穴胜鹏1(), 马东3()   

  1. 1 山东大学 高等技术研究院,山东 济南 250061
    2 山东大学 能源与动力工程学院,山东 济南 250061
    3 北京理工大学 爆炸科学与技术国家重点实验室,北京 100081
  • 收稿日期:2022-11-01 上线日期:2022-12-27
  • 作者简介:

    李泽昊(2002—),男,本科生,研究方向为冲击动力学。E-mail:;

    王成(1972—),男,教授,博士生导师,研究方向为爆炸力学。E-mail:;

    贾时雨(1994—),女,博士研究生,研究方向为爆炸力学。E-mail:;

    穴胜鹏(1996—),男,硕士研究生,研究方向为冲击动力学。E-mail:;

    马东(1989—),男,博士研究生,研究方向为爆炸力学。E-mail:;

  • 基金资助:
    国家自然科学基金项目(12102233); 国家自然科学基金项目(U20A2071); 爆炸科学与技术国家重点实验室(北京理工大学)开放课题(KFJJ20-10M)

Experimental Study of Impact Energy Absorption of Aerogel Sandwich Structures

LI Zehao1,2(), XU Wenlong1(), WANG Cheng3(), JIA Shiyu3(), XUE Shengpeng1(), MA Dong3()   

  1. 1 Institute for Advanced Technology, Shandong University, Jinan 250061, Shandong, China
    2 School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China
    3 State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
  • Received:2022-11-01 Online:2022-12-27

摘要:

针对装甲车、舰船等武器装备冲击碰撞防护需求,提出一种气凝胶夹芯冲击吸能结构,采用一级轻气炮系统,结合力传感器、高速摄像及数字图像相关技术,研究10.4 m/s、15.4 m/s、19.0 m/s共3种较高冲击速度下7种气凝胶夹芯结构冲击吸能特性。研究结果表明:随着冲击速度的增加,7种气凝胶夹芯结构的峰值碰撞力、压垮距离、比吸能、平均碰撞力均逐渐增大;相同冲击速度下,随着气凝胶层厚度的增加,气凝胶夹芯结构的比吸能逐渐增大,峰值碰撞力呈下降趋势,碰撞力效率总体变化较小;在研究范围内,较大的气凝胶层厚度有利于结构冲击吸能特性的提高,同时避免过大峰值碰撞力对防护人员或装备的损伤。

关键词: 冲击吸能, 夹芯结构, 气凝胶, 比吸能

Abstract:

To meet the impact and collision protection needs of armored vehicles, ships and other weapons and equipment, an impact energy absorption structure with an aerogel core is proposed. Using a one-stage light air gun system, combined with the force sensors, a high-speed camera and digital image related technologies, the impact energy absorption characteristics of seven aerogel sandwich structures at three impact velocities of 10.4 m/s, 15.4 m/s and 19.0 m/s are studied. The results show that: the peak impact force, collapse distance, specific energy absorption and mean impact force of the seven aerogel sandwich structures increase gradually with the increase of impact velocity; under the same impact velocity, with the increasing aerogel layer thickness, the specific energy absorption of the sandwich structures gradually increases, the peak impact force decreases, and the overall change of the impact force efficiency is small. Therefore, within the research scope, a larger aerogel layer thickness is beneficial to the improvement of impact energy absorption of the aerogel sandwich structures, and can avoid the damage of excessive peak force to the protection personnel or equipment.

Key words: impact energy absorption, sandwich structure, aerogel, specific energy absorption