基于落锤装置的蜂窝铝夹芯结构动力学特性  

Dynamic Properties of Aluminum Honeycomb Sandwich Structure Based on Drop Hammer Equipment

作　　者：吴晖[1] 邹广平[2] 刘岚 唱忠良[2] 苏一鸣 WU Hui;ZOU Guangping;LIU Lan;CHANG Zhongliang;SU Yiming(a.Military Representative Office in the 701 Institute,b.Department of Surface Naval Ship,China Ship Development and Design Center,Wuhan 430064,China;College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]中国舰船研究设计中心海军驻武汉701所军事代表处,湖北武汉430064 [2]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001 [3]中国舰船研究设计中心水面舰船研究部,湖北武汉430064

出　　处：《济南大学学报（自然科学版）》2018年第4期268-273,共6页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金项目(11372081)

摘　　要：利用实验结合数值计算的方法研究蜂窝铝夹芯结构在受冲击载荷作用时的动力学特性;采用落锤装置对蜂窝铝夹芯结构在受到冲击载荷时的变形进行研究,建立有限元模型,并与实验值进行对比;分析落锤冲击破坏过程中蜂窝铝夹芯结构面板与蜂窝芯子在不同阶段的应力分布,讨论不同冲击速度对蜂窝铝夹芯结构面板凹痕深度与面积的影响,以及实验过程中落锤与试件之间的接触力和能量吸收效果。结果表明,随着落锤冲击速度的增大,面板和蜂窝芯子在最大凹痕深度处的应力峰值逐渐增大,应力波辐射范围增大,蜂窝铝夹芯结构吸收的能量也相应增大。Dynamic properties of the aluminum honeycomb sandwich structure under impact loading were investigated by combining experiments with numerical modeling. Compared with experiment data,a finite element model was established to study the deformation of the aluminum honeycomb sandwich structure with a drop hammer equipment. The stress distribution of the aluminum honeycomb sandwich structure and honeycomb core at different stages of failure process was analyzed. The influence of different impact velocities on the dent depth and area of the aluminum honeycomb sandwich structure,and the effect of contact force between the hammer and the specimen and the energy absorption in the experiment were discussed. The results show that the stress amplitude of the front plate and the honeycomb core at the maximum dent depth gets larger with increase of the drop hammer speed,the radiation scope of stress wave expands more widely,and the energy absorbed by the aluminum honeycomb sandwich structure increases correspondingly.

关 键 词：蜂窝铝夹芯结构 落锤试验 应力分布 有限元法 

分 类 号：O347.4[理学—固体力学]