摘要
自锁吸能系统可无需外加约束而避免元件在冲击荷载下的横向飞溅,具有广阔的应用前景。然而,已有自锁吸能系统大都只在特定方向具有自锁稳定性,构型复杂且造价昂贵,或截面形状特殊,不便拆装,制约了应用和推广。为此,该文提出了一种新型的多向自锁能量吸收系统,由具有双叉戟状横截面的薄壁管组成,拆装方式灵活便捷。当系统受冲击时,管件的管槽限制了相邻主体管的位移,使管件系统在空间多个方向的冲击载荷下,均可实现自锁,并且充分变形,稳定吸能。通过有限元分析,系统考察了双叉戟单管的几何参数效应以及阵列轮廓尺寸对系统吸能特性的影响。相较于已有的自锁系统,该文发展的双叉戟自锁吸能系统具有更优异的吸能特性。
The self-locked energy absorbing system can avoid the lateral splashing of components under impact loading without external constraints,and hence has broad application prospects.However,for most of the existing self-locked energy absorbing systems,they can only maintain self-locking stability at specific directions,or the configuration is complexed and expensive to be manufactured,or the cross-sectional shape is irregular,leading to inconvenient for disassembly and assembly.These disadvantages greatly restrict the application and promotion of existing self-locked energy absorbing systems.To this end,a novel multidirectional self-locked energy absorbing system is proposed in this work.The system consists of thin-walled tubes with a bident-shaped cross-section,which is flexible and convenient to disassemble and to assemble.When the system proposed is subjected to impact loads,the tube grooves limit the displacement of the adjacent body tubes,achieve self-locking under impact loads in multiple spatial directions and,allow the system to be fully deformed and to absorb energy stably.Through finite element analysis,the systematically investigated is the effects of geometric parameters of a single bident tube and of the array profile size on the energy absorption characteristics of the system.Compared with the existing self-locked energy absorbing systems,it is also proved that the system proposed has superior energy absorption capacity.
作者
王柯文
朱一林
赵翔
于超
邵永波
WANG Ke-wen;ZHU Yi-lin;ZHAO Xiang;YU Chao;SHAO Yong-bo(Research Institute of Engineering Safety Assessment and Protection,School of Civil Engineering and Geomatics,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province,Southwest University of Science and Technology,Mianyang,Sichuan 621010,China;School of Mechanics and Aerospace Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)
出处
《工程力学》
EI
CSCD
北大核心
2024年第11期57-66,共10页
Engineering Mechanics
基金
国家自然科学基金项目(11702036)
四川省科技厅项目(2020YFH0127)
工程材料与结构冲击振动四川省重点实验室开放基金项目(22kfgk08)。
关键词
能量吸收
自锁结构
薄壁结构
双叉戟状管
力学超材料
energy absorption
self-locked system
thin-walled structure
bident-shaped tube
mechanical metamaterial
作者简介
王柯文(1991−),女,四川人,硕士生,主要从事先进自锁吸能系统设计研究(E-mail:andreawkw@foxmail.com);赵翔(1982−),男,山东人,副教授,博士,硕导,主要从事结构振动与减隔震研究(E-mail:zhaoxiang_swpu@126.com);于超(1987−),男,河南人,教授,博士,博导,主要从事先进材料多场耦合循环本构理论研究(E-mail:chaoyu@home.swjtu.edu.cn);邵永波(1973−),男,山东人,教授,博士,博导,主要从事钢结构稳定性与疲劳研究(E-mail:ybshao@swpu.edu.cn);通信作者:朱一林(1988−),男,山东人,副研究员,博士,硕导,主要从事先进力学超材料多功能一体化设计、材料循环本构理论研究(E-mail:lin5210feng@163.com).
