内爆作用下金属壳体与纤维复合材料增强壳体动态响应特性  

Dynamic Responses of Metal Shell and Fiber-reinforced Composite Shell Subjected to Internal Blast Loading

作　　者：甘云丹 张庆明[2] 张秀珍 龙仁荣[2] 苏健军[1] 仲凯[1] 梁浩哲[2] GAN Yundan;ZHANG Qingming;ZHANG Xiuzhen;LONG Renrong;SU Jianjun;ZHONG Kai;LIANG Haozhe(Xi'an Modern Chemistry Research Institute,Xi'an 710065,Shaanxi,China;State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Kangyue Technology Co.,Ltd.,Shouguang 262711,Shandong,China)

机构地区：[1]西安近代化学研究所,陕西西安710065 [2]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [3]康跃科技股份有限公司,山东寿光262711

出　　处：《兵工学报》2020年第S02期128-134,共7页Acta Armamentarii

摘　　要：为了研究金属壳体(MS)和纤维复合材料增强壳体(FCRS)的动态响应特征,采用三维数字图像相关方法和经验模态分解-希尔伯特黄变换研究了两种壳体结构在内爆作用下的响应过程。通过对比不同时刻的动态响应可知:FCRS动态变形过程复杂,径向变形的同时不仅伴随着轴向变形,还伴随着复合材料层与层之间以及与内衬间的摩擦,大大削弱了爆炸载荷作用在结构上的能量,降低了其最大变形和塑性变形。对比两种壳体振动能量在时频域内的分布特征可知:FCRS可降低内爆作用下壳体能量过度集中对结构破坏的概率。以上结果表明FCRS的抗爆性能明显优于MS.In order to study the dynamic response characteristics of metal shell and fiber-reinforced composite shell,the 3D digital image correlation(3D-DIC)method and the empirical mode decomposition-Hilbert Huang transform(EMD-HHT)are used to study the response process of two shell structures under the action of internal explosion.The comparison of dynamic responses at different times shows that the dynamic deformation process of fiber-reinforced composite shell is complex.Along with the radial deformation,there exist the axial deformation,and the friction between layers and between the composite material and the lining.Accordingly,the energy acting on the structure under explosion loading is greatly weakened,and the maximum deformation and the plastic deformation are reduced.The relations among the radial deformation of shell,TNT equivalent and the structure size are also fitted.The distribution characteristics of the vibration energy of shells in the time-frequency domain are compared.It is shown that the fiber-reinforced composite shell can reduce the probability of the structure failure caused by the excessive energy concentration on the shell under the action of internal explosion.Through the above comparison,it can be seen that the anti-detonation performance of the fiber-reinforced composite shell is obviously better than that of the metal shell.

关 键 词：金属壳体 纤维复合材料增强壳体 爆炸 动态响应 数字图像相关 

分 类 号：O383.3[理学—流体力学]