摘要
夹芯结构因轻质、吸能特性,在航空航天、国防等领域应用广泛,提升其在内爆炸载荷下的抗爆性能具有重要意义。设计了圆环夹芯管(R)、聚氨酯泡沫夹芯管(F)、圆环-聚氨酯泡沫混合夹芯管(RF)3种结构,并以无填充夹芯管(A)为对照组,通过内爆炸载荷试验与有限元模拟,对比分析了4种结构在不同炸药量下的变形模态与能量吸收能力,同时探究了泡沫填充方式对夹芯管力学性能的影响。与对照组相比,在TNT当量为24、36、48 g时,F、R、RF结构的无量纲化挠度均有不同程度的降低;TNT当量48 g时,RF结构比吸能较R结构提高5%,其抗爆性能最优。此外,当TNT当量大于37.39 g时,圆环内填充泡沫(FR结构)抗变形能力最强;小于该值时,圆环与管壁空隙填充泡沫(RF结构)抗爆性能最佳。
Sandwich structures are widely used in aerospace,national defense and other fields due to their lightweight and energy-absorbing properties,and it is of great significance to improve their anti-explosion performance under internal explosion loads.Three structures were designed,including ring sandwich tube(R),polyurethane foam sandwich tube(F),and ring-polyurethane foam hybrid sandwich tube(RF),with the non-filled sandwich tube(A)as the control group.Through internal explosion load tests and finite element simulations,the deformation modes and energy absorption capacities of the four structures under different explosive amounts were compared and analyzed,and the influence of foam filling methods on the mechanical properties of sandwich tubes was explored.The results showed that,compared with the control group,the non-dimensional deflection of structures F,R and RF was reduced to varying degrees under TNT equivalents of 24 g,36 g and 48 g.At a TNT equivalent of 48 g,the specific energy absorption of RF structure was 5%higher than that of R structure,exhibiting the best anti-explosion performance.In addition,when the TNT equivalent was greater than 37.39 g,the foam-filled ring structure(FR)showed the strongest deformation resistance;when it was less than this value,the foam-filled structure in the gap between the ring and the tube wall(RF)had the optimal anti-explosion performance.
作者
栗弘烨
李子豪
秦晓峰
李世强
LI Hongye;LI Zihao;QIN Xiaofeng;LI Shiqiang(Institute of Applied Mechanics,College of Aeronautics and Astronautics,Taiyuan University of Technology,Taiyuan 030024,China;State Key Laboratory of Explosion Science and Safety Protection,Beijing Institute of Technology,Beijing 100081,China)
出处
《机械强度》
北大核心
2025年第9期213-220,共8页
Journal of Mechanical Strength
基金
爆炸科学与安全防护全国重点实验室(北京理工大学)开放课题(KFJJ24-03M)。
关键词
夹芯圆管
圆环芯层
聚氨酯泡沫
内爆炸载荷
抗爆性能
Sandwich tube
Toroidal tubular core
Polyurethane foam
Internal blast loading
Blast resistance performance
作者简介
栗弘烨,男,1998年生,山西长治人,在读硕士研究生,主要研究方向为冲击动力学,E-mail:lihongye0818@163.com。;通信作者:李世强,男,1986年生,山西阳泉人,博士,教授,主要研究方向为冲击动力学,E-mail:lishiqiang@tyut.edu.cn。
