折叠式夹层结构压皱性能数值仿真  

Numerical simulation on crushing performance of folding sandwich structure

作　　者：俞鞠梅[1] 周红[1] 张延昌[2] 

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003 [2]中国船舶及海洋工程设计研究院,上海200011

出　　处：《计算机辅助工程》2013年第3期63-70,共8页Computer Aided Engineering

基　　金：国家自然科学青年基金(51109101/E091002)

摘　　要：为研究网格尺寸、加载速率及仿真试件的单元数和单元长度等对夹层板压皱性能的影响,用Abaqus对U-I形折叠式夹层板的压皱性能进行数值仿真,提出精度高、效率高的数值仿真模型化技术,分析不同变形模式和夹层结构尺寸对压皱性能的影响.结果表明:变形模式是决定夹层板压皱性能的关键因素;不同的结构参数组合会形成不同的变形模式,进而影响结构的压皱载荷和吸能特性;存在较优的夹芯壁厚、高度、间距和夹角的尺寸组合使夹层结构的吸能效率较优.To study the effect of mesh size,loading rate and the unit number and length of simulation specimen on crushing performance of sandwich structure,a numerical simulation on the crushing performance of a U-I type folding sandwich plate is performed by Abaqus,and a numerical simulation modeling technique with high precision and efficiency is proposed to analyze the effect of different deformation modes and sandwich structure sizes on crushing performance.The results show that,the deformation mode is the key factor that determines the crushing performance of the sandwich plate;the different structure parameter combination can lead to different deformation modes,which affects the crushing load and energy-absorption characteristics;there exists a better size combination of sandwich wall thickness,height,spacing and angle that makes the energy-absorption efficiency better.

关 键 词：折叠式夹层板 压皱性能 模型化技术 变形模式 结构参数 吸能 

分 类 号：U668[交通运输工程—船舶及航道工程]