空爆载荷下U型夹层板抗爆性能数值仿真研究  

Numerical simulation of anti-explosion performance of U-type core sandwich panel under air explosion

作　　者：张延昌[1] 赵卉[1] 

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

出　　处：《江苏科技大学学报（自然科学版）》2012年第5期417-423,429,共8页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(51109101)

摘　　要：力学性能优越的夹层板结构在飞机、高速列车等交通运输领域得到广泛应用.为研究U型夹层板空爆载荷下的损伤特性,利用有限元软件MSC.Dytran分析U型夹层板空爆载荷下的损伤变形模式、耦合力、结构位移、速度、加速度、吸能,并与加筋板架对比;应用正交试验设计方法分析结构参数对抗爆性能的影响程度及较优的尺寸组合.分析表明:冲击载荷下U型夹层板上下面板的变形模式为膜拉伸,产生波浪式变形;夹芯层易于压皱变形,减少了对上面板冲击载荷的传递,同时夹芯层吸能效率较高,使得上面板的塑性变形显著减小;夹层板上下面板位移、速度、加速度、吸能均小于加筋板,表现出优良的抗爆性能.结构参数对夹层板抗爆性能影响程度的主次顺序为:夹芯角度、上面板厚度、夹芯壁厚度、下面板厚度;经验证,优化尺寸后的夹层板抗爆性能显著提高.Sandwich panels with superior mechanical properties have been widely used in transportation system such as the aircraft and the high-speed train. To investigate damage properties of the U-type core sandwich pan- el, MSC. Dytran was applied to analyze the deformation modes, coupling forces, velocity, acceleration and ener- gy absorption of the sandwich panel under air explosion. The results were compared with the stiffened plate. Or- thogonal experimental method was applied to analyze the affect of structural parameters on the anti-explosion per- formance and better combination of sizes. Analysis shows the top and bottom face of the U-type core sandwich panel exihibit membrane tensile and wave deformation. Easily crushed core reduces the impact on the top faces and has high energy absorption efficiency, making deformation of the top face reduced significantly. The deform- ations, speeds, and accelerations of the top and bottom faces are less than those of the stiffened plate. The U- type core sandwich panel shows superior antiknock performance. The influence of structural parameters on the anti-explosion performance of the sandwich panel in a diminishing order is： inclination angle, top face sheet thickness, width of sandwich core member, bottom face sheet thickness. The antiknock performance of the sand- wich panel with ootimal combination of sizes is imnroved significantly.

关 键 词：空中爆炸 U型夹层板 抗爆性能 优化设计 

分 类 号：U416.216[交通运输工程—道路与铁道工程]