船用蜂窝金属夹芯板重复冲击实验研究  

Experimental study on the dynamic behaviours of honeycombsandwich plates under repeated impacts

作　　者：李应刚[1,2] 张雨[1] 朱凌 郭开岭[1] 王纬波 LI Ying-gang;ZHANG Yu;ZHU Ling;GUO Kai-ling;WANG Wei-bo(Key Laboratory of High Performance Ship Technology,Wuhan University of Technology,Ministry of Education,Wuhan 430063,China;State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an Jiaotong University,Xi’an 710049,China;China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]武汉理工大学高性能舰船技术教育部重点实验室,武汉430063 [2]西安交通大学机械结构强度与振动国家重点实验室,西安710049 [3]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2021年第5期637-644,共8页Journal of Ship Mechanics

基　　金：国家自然科学基金项目(11972269,11602182);湖北省自然科学基金项目(2019CFB566)。

摘　　要：蜂窝金属夹芯结构具有高比强度、高比刚度和高能量吸收性能,在船舶与海洋工程结构轻量化与碰撞冲击防护领域具有广泛的潜在应用价值。本文采用INSTRON CEAST 9350落锤冲击试验机进行了船用蜂窝金属夹芯板重复冲击实验,得到了蜂窝金属夹芯板结构塑性变形累积过程以及重复冲击载荷-位移曲线。研究结果表明:在重复冲击载荷作用下,蜂窝金属夹芯板结构上下面板弯曲变形逐渐增大,蜂窝芯层薄壁结构逐渐达到密实化;上面板主要表现为局部凹陷与整体弯曲的耦合变形模态,下面板变形模态经历了从整体弯曲到整体弯曲与局部凹陷耦合模式的转变过程;重复冲击能量及上下面板厚度分配对蜂窝金属夹芯板结构重复冲击动态变形累积及能量吸收性能具有显著影响。Honeycomb sandwich structures possess a potential application value in the field of lightweight structure and collision impact protection of ships and offshore structures due to their high specific strength,high specific stiffness and high energy absorption performance.In this paper,repeated impact experiments of honeycomb sandwich plates(HSPs)were conducted by using the drop-weight impact testing machine IN⁃STRON CEAST 9350.The accumulation processes of plastic deformation as well as the impact force-dis⁃placement curves were obtained.Experimental results showed that under repeated impact loadings,the per⁃manent deflections of both the top and the bottom face sheets of HSPs increased gradually,the honeycomb core was compressed gradually and finally reached the densification stage.The deformation mode of the top face sheet was embodied as the coupling mode of the global bending deformations and the local indentations,whereas the deformation mode of the bottom face sheet experienced the mode transition from the global bend⁃ing deformation model to the coupling deformation mode.In addition,the repeated impact energy and the thickness distribution of the face sheets had significant influences on the plastic deformation accumulation and energy absorption performances of the honeycomb sandwich plates.

关 键 词：蜂窝金属夹芯板 重复冲击 动态响应 

分 类 号：U661.72[交通运输工程—船舶及航道工程]