摘要
基于动力显式有限元法,研究了泡沫铝夹芯管在横向爆炸载荷下的动态响应,以芯层能量吸收及外管刚度为目标,对结构的抗爆性能进行了多目标优化设计。系统研究了泡沫铝夹芯管结构的几何参数、泡沫铝芯层相对密度和爆炸加载条件等对其变形规律和能量吸收性能的影响。结果表明:横向爆炸载荷下,泡沫铝夹芯管的变形区域集中在跨中位置,内外管通过跨中位置塑性变形和变形区域左右两端的弯曲变形吸收能量,泡沫铝芯层主要依靠芯层压缩吸收能量;减小外管壁厚或泡沫铝芯层相对密度能有效提高结构的比吸能,但会影响泡沫铝夹芯管内外管的变形程度;外管几何参数对结构吸能性能和内外管变形的影响程度远大于内管;基于泡沫铝夹芯管的数值模拟结果,构造了响应面模型并对其进行了多目标优化,给出了Pareto前沿图,可根据实际工程应用来确定泡沫铝夹芯管结构中内外管的壁厚与芯层的相对密度。
The dynamic response of aluminum foam-filled sandwich tubes subjected to lateral blast loading was investigated numerically using the dynamic explicit finite element method.Based on numerical simulation,the structural blast resistance was optimized with the core energy absorption and outer tube stiffness as the optimization objectives.The effects of structural geometric parameters,the relative density of the aluminum foam core layer,and blast loading conditions on the deformation patterns and energy absorption properties of aluminum foam-filled sandwich tube have been systematically investigated.The study results indicate that the deformation region of the aluminum foam-filled sandwich tube under lateral blast loading is mainly concentrated in the middle span.Energy absorption occurs through plastic deformation in the middle of the span and bending deformation at the left and right ends of the deformed region for both the inner and outer tubes.In contrast,the energy absorption of the aluminum foam core layer relies primarily on core compression.Reducing of the thickness of the outer tube or the relative density of the aluminum foam core layer can effectively improve the specific energy absorption of the structure and increase the deformation of the inner and outer tubes.The effect of the geometry parameters of the outer tube on the energy absorption properties of the structure and the deformation of the inner and outer tubes is much larger than that of the inner tube.A response surface model is constructed based on the numerical simulation results of aluminum foam-filled sandwich tube.Subsequently,multi-objective optimization is performed and the resulting Pareto front graph is provided.The determination of the wall thickness of the inner and outer tubes,together with the relative density of the aluminum foam core layers in the aluminum foam-filled sandwich tube,can be based on the specific engineering application requirements.
作者
武钰朋
张天辉
刘志芳
雷建银
李世强
WU Yupeng;ZHANG Tianhui;LIU Zhifang;LEI Jianyin;LI Shiqiang(Institute of Applied Mechanics,College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China)
出处
《高压物理学报》
CAS
CSCD
北大核心
2023年第4期96-108,共13页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(12272254,12072219)
山西省自然科学基金(202203021211170)。
关键词
泡沫铝夹芯管
爆炸载荷
动态响应
多目标优化
aluminum foam-filled sandwich tube
blast loading
dynamic response
multi-objective optimization
