多层梯度点阵夹芯结构抗爆性能研究  

Blast resistance of multilayer graded lattice sandwich structures

作　　者：韩笑[1] 杨丽红[1] 于国财 曲嘉[1] 吴林志 

机构地区：[1]哈尔滨工程大学航天与建筑工程学院先进船舶材料与力学工信部重点实验室,哈尔滨150001

出　　处：《应用力学学报》2018年第1期185-190,共6页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金重点项目(11432004);国家自然科学基金青年基金项目(11302055);船用抗爆抗侵彻复合装甲技术研究(GK2020260168)

摘　　要：基于CONWEP对多层梯度点阵夹芯板在爆炸载荷下的动态响应进行了模拟研究。在相同爆炸载荷下,对四种梯度点阵模型的后面板中心挠度峰值进行了对比分析,讨论了各模型每层芯子的总变形能随相对密度比的变化规律,并对多层点阵夹芯板各层的变形情况进行了比较。分析结果表明:对于三层金字塔点阵夹芯结构,强弱相间的点阵夹芯板充分利用了前两层芯子的变形吸能,从而对第三层芯子和后面板起到了很好的保护作用;且在350g TNT炸药和200mm爆距的爆炸载荷下,相对密度比为0.5的强弱相间点阵夹芯板的后面板中心挠度峰值最小,抗爆冲击性能最优。The simulation analysis of the dynamic response of multilayer graded lattice sandwich plates under explosion is conducted based on CONWEP. The peak deflections at the back-sheet center for four kinds of graded lattice models are discussed, and the varying trend of deformation energies for each layer with the relative density ratio between various layers has been analyzed. The deformations of each layer of multilayer lattice sandwich plates are compared. The analysis results show that the deformation energy of the first two layers of the grade lattice sandwich plate with strong-weak interphase core are fully utilized for the three-layer pyramid lattice sandwich structure, so that the third layer of the core and the back-sheet are well protected. The peak deflection at the back-sheet center for the grade lattice sandwich plate with strong-weak interphase core is minimal and the grade lattice sandwich plate has the best blast resistance performance when the relative density ratio between various layers is 0.5 under an explosive load of 350 g TNT and explosive distance of 200 mm.

关 键 词：梯度点阵夹芯 多层夹芯结构 抗爆性能 数值仿真 

分 类 号：O347[理学—固体力学]