高过载环境下胀环/泡沫铝复合结构缓冲吸能研究  

Study on Buffer Energy Absorption of Expansion Ring/Foam Aluminum Composite Structure under High Overload Environment

作　　者：赵文杰 梁增友[1] 时文超 邓德志[1] 王耀琦 ZHAOWenjie;LIANG Zengyou;SHIWenchao;DENG Dezhi;WANG Yaoqi(College of Mechatronics Engineering,North University of China,Faiyuan 030051,China;Shandong Huayuan Laidong Internal Combustion Engine Co. Ltd,Shandong Laiyang 265200,China)

机构地区：[1]中北大学机电工程学院,太原030051 [2]山东华源莱动内燃机有限公司,山东莱阳265200

出　　处：《弹箭与制导学报》2018年第5期51-54,59,共5页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：兵器装备预先研究项目;山西省回国留学人员科研资助项目(5386046750)资助

摘　　要：胀环/泡沫铝缓冲器通过弹塑性变形、锥台与胀环组件之间的摩擦热能和泡沫铝压缩变形吸收能量。为了研究胀环/泡沫铝复合结构的缓冲吸能,利用ANSYS/LS-DYNA软件进行高过载环境下的数值模拟研究,采用5个指标对其进行缓冲性能评估。结果表明:在高过载环境下的压缩机制与单一胀环结构有明显差异;在相同位移条件下,吸能位移曲线明显大于单一胀环结构和泡沫铝吸能位移曲线的线性叠加;与单一胀环结构相比,复合结构最显著的特点是缓冲时间明显增长。Energy of expansion ring/foam aluminum bumper can be absorbed through the elastic deformation,friction between the frustum and the expansion ring assembly thermal energy and aluminum foam compression deformation. In order to study the buffer energy absorption of the expansion ring/foam aluminum composite structure,the numerical simulation under high overload environment was carried out by ANSYS/LS-DYNA software,the buffer performance was evaluated by five indexes. The results show that the compressive mechanism is obviously different from that of a single expansion ring under high overload condition. Under the same displacement condition,the displacement curve of energy dissipation is obviously larger than the linear superposition of the single expansion ring structure and the foam aluminum displacement curve. Compared with the ring structure,the most prominent feature of the composite structure is that the buffer time is obviously increased.

关 键 词：SPH 胀环 泡沫铝 高过载 评估方法 

分 类 号：TB122[理学—工程力学] TB125[理学—力学]