爆炸载荷下层级蜂窝铝夹芯板的动力响应分析

发布时间：2018-05-17 21:41

本文选题：层级蜂窝铝夹芯板 + 吸能特性　；参考：《华南理工大学学报(自然科学版)》2017年05期

【摘要】：通过在正六边形蜂窝结构的节点上增加次级六边形蜂窝结构,形成一种层级蜂窝芯层结构,利用LS-DYNA有限元软件分析了层级蜂窝铝夹芯板在爆炸载荷作用下的动力响应和吸能特性,研究了载荷与芯层构型对结构变形和能量吸收的影响,并与传统蜂窝铝夹芯板进行了对比.结果表明:在所研究的范围内,当载荷较小时,传统蜂窝铝夹芯板的后面板挠度较小;当载荷较大时,多层级蜂窝铝夹芯板的后面板挠度较小,抗冲击能力较好,并且这种优势随着载荷的增加愈加明显;改变芯层层级参数对结构后面板挠度的影响较小,但对芯层比吸能有较大的影响,当层级参数为0.1时,芯层比吸能最高.
[Abstract]:By adding a secondary hexagonal honeycomb structure to the node of the hexagonal honeycomb structure, a hierarchical honeycomb core layer structure is formed. The dynamic response and energy absorption characteristics of layered honeycomb aluminum sandwich panels under explosion load are analyzed by using LS-DYNA finite element software. The effects of load and core configuration on structural deformation and energy absorption are studied. And compared with the traditional honeycomb aluminum sandwich panel. The results show that when the load is small, the deflection of the rear panel of the traditional honeycomb aluminum sandwich panel is smaller, and when the load is high, the deflection of the multi-layer honeycomb aluminum sandwich panel is smaller and the impact resistance is better. And this advantage becomes more and more obvious with the increase of load. Changing the core layer parameters has little effect on the deflection of the rear panel, but has a great effect on the specific energy absorption of the core layer. When the level parameter is 0.1, the specific energy absorption of the core layer is the highest.
【作者单位】：湖南大学汽车车身先进设计制造国家重点实验室;太原理工大学应用力学与生物医学工程研究所;
【基金】：国家自然科学基金资助项目(51575172);国家自然科学基金青年科学基金资助项目(11602161) 山西省自然科学基金青年科学基金资助项目(201601D021025)~~
【分类号】：TB383.4;TG146.21

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