摘要
通过有限元数值模拟方法,对方孔蜂窝夹层板在爆炸冲击载荷下的变形机理和吸能特性进行了分析。在单位面积质量以及夹层板芯层薄壁间距、高度给定的情况下,通过对不同夹芯层相对密度下夹层板的吸能率以及上、下面板最大变形的比较,得出了最优的夹芯层相对密度。在此相对密度下,夹芯层吸能率最高,下面板变形最小,夹层板的抗冲击性能最优。同时还讨论了夹层板芯层薄壁间距、厚度、高度以及面板厚度对其各部分吸能率的影响,以得到最优化的夹层板结构。
The deformation mechanism and energy absorption characteristics of a square hole honeycomb sandwich plate under blast loading were analyzed with finite element numerical simulation method. With the given per unit area mass, cell size and core height, by comparing sandwich plate＇s energy absorptivity and face sheets＇s maximum deflection under different core relative densities, the optimal core relative density of the sandwich plate was obtained. It was shown that with this relative density, the core has the highest energy absorptivity, the minimum deflection in the bottom face sheet and the sandwich plate has superior shock resistance. Furthermore, the effects of geometrical parameters including cell size, core web thickness, core height and face sheet thickness on the energy absorptivity were discussed to obtain the optimal sandwich plate structure.
出处
《振动与冲击》
EI
CSCD
北大核心
2012年第17期186-189,共4页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(10772196)
关键词
夹层板
爆炸载荷
能量吸收
有限元模拟
sandwich plates
blast loading
energy absorption
finite element simulation
