基于SPH方法模拟30 mm线膛炮波纹罩压垮过程的力学参数研究  

Mechanical parameters of the overwhelm process of fluted liner for 30 mm rifled gun based on SPH method

作　　者：王小峰 陶钢[1] 任保祥 庞春桥 范强 刘龙 WANG Xiaofeng;TAO Gang;REN Baoxiang;PANG Chunqiao;FAN Qiang;LIU Long(School of Energy and Power Engineering, Nanjing University of Science and Technology,Nanjing 210094, Jiangsu, China;Chongqing Chang an Industry (Group) Limited Liability Company,Chongqing 401120, China)

机构地区：[1]南京理工大学能源与动力工程学院,江苏南京210094 [2]重庆长安工业(集团)有限责任公司,重庆401120

出　　处：《爆炸与冲击》2019年第1期1-9,共9页Explosion and Shock Waves

摘　　要：为研究高旋转对30 mm聚能装药破甲作用的影响机理及自旋补偿原理,采用LS-DYNA有限元软件中的SPH方法模拟30 mm线膛炮波纹罩的压垮过程,得到粒子的实际运动可分解成向心运动与绕中心圆周切线运动,提出压垮过程的4个阶段:压垮前期、缓冲期、波纹槽区域粒子速度增大期和中心粒子相互作用期。射流形成层沿逆时针方向旋转,而形成杵体的材料以相反方向旋转。结果表明:波纹罩特殊设计可以补偿旋转扰动对30 mm聚能装药侵彻作用的负面影响。In order to study the effect of high rotation on the shell-penetration of30mm shaped charge and the mechanism of spin-compensation,we simulated the overwhelm process of the fluted liner for the30mm rifle gun using the SPH method of LS-DYNA finite element software,and found that the actual movement of particles can be decomposed into centripetal motion and tangential motion around the center circle.We then put forward the four stages of the overwhelm process,those of the early crush,the buffer,the particle velocity increase in the fluted liner area and the central particle interaction.The jet forming layer rotates in a counterclockwise direction,whereas the material forming the pestle body rotates in the opposite direction.The results show that the special design of the fluted liner can compensate the negative impact of the rotating disturbance on the penetration effect of the30mm shaped charge.The compensating rotating speed of the projectile is379r/s and larger.

关 键 词：SPH方法 聚能装药 波纹罩 自旋补偿 压垮过程 转速 

分 类 号：O383[理学—流体力学] TJ410[理学—力学]