聚醚酰亚胺长杆弹弹托在膛压载荷下的动力学响应  

Dynamic Response of the Polyetherimide Sabot of a Long Rod Projectile under Bore Pressure Load

作　　者：乔宇[1] 陈利[1] 张庆明[1] 巨圆圆 陆阳予 QIAO Yu;CHEN Li;ZHANG Qingming;JU Yuanyuan;LU Yangyu(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Naval Research Academy,Beijing 100161,China)

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]海军研究院,北京100161

出　　处：《高压物理学报》2020年第6期142-148,共7页Chinese Journal of High Pressure Physics

基　　金：国防科技创新特区项目(18-163-13-ZD-012-003-03)。

摘　　要：建立了长杆弹的动力学计算模型,弹托采用新型玻璃纤维增强聚醚酰亚胺复合材料,利用LS-DYNA软件模拟了长杆弹在轻气炮膛压载荷下的运动过程,分析了复合材料弹托的动力学响应规律,并对弹托结构进行了改进。结果表明:最大膛压时弹托各处应力达到最大,高应力区分布在弹托尾部外围附近及后齿齿根上,齿根、齿顶应力大小不同;弹托头部强度裕度较大,通过改进弹托结构,在满足发射强度的同时,弹托质量减少了16 g,弹丸初速提高了612.2 m/s。A dynamic calculation model for launching a long rod projectile was established in this paper,where the sabot used a new type of glass fiber reinforced polyetherimide composite material,and then the dynamic deformation of the sabot under the light gas gun pressure load was analyzed by the LS-DYNA software.The results show that the maximum stress inside the sabot occurs at the maximum bore pressure.The high stress area is distributed on the outer periphery and the root tooth of the sabot tail.The stresses at the tooth root and tooth tip are different with the overplus of material strength at the sabot head.By improving the structure of the sabot,the mass of the sabot is reduced by 16 g with the extra velocity gain of612.2 m/s at given launching pressure.

关 键 词：复合材料弹托 动力学模型 动态响应 结构优化 

分 类 号：O347.1[理学—固体力学]