弹壳体结构对燃料装药抛撒速率影响的数值模拟研究  

Influence of shell Structure on Dispersing Velocity of Fuel-air Mixture

作　　者：王晔[1] 白春华[1] 李建平[1] WANG Ye BAI Chun-hua LI Jian-ping(State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, 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

出　　处：《兵工学报》2017年第1期43-49,共7页Acta Armamentarii

基　　金：国家部委预先研究项目(9140A05080507)

摘　　要：为研究壳体结构对燃料近区抛撒速率的影响,利用LS-DYNA程序,分别对无加强杆结构和有加强杆结构的中心抛撒药驱动燃料抛撒和壳体破坏过程进行数值模拟,并与试验结果进行了对比,得到了燃料边界初始膨胀状态、壳体破裂过程和刻槽应力随时间变化的规律,以及不同结构对燃料抛撒最大速率的影响。研究结果表明:在满足结构强度的要求且径向强度相同的情况下,加强壳体的轴向拉力,能够有效提高燃料抛撒速率;在相同的中心药量/燃料量的情况下进行抛撒,当轴向拉力提高0.7×106N时,有加强杆结构较无加强杆结构有利于获得较大的抛撒速率,有加强杆结构的燃料最大抛撒速率可达316.3 m/s,无加强杆结构的燃料最大抛撒速率为285.3 m/s,燃料抛撒最大速率提高了10.8%.In order to study the dispersal characteristics for different shell structures, the processes of fuel dispersion and shell breakage driven by central explosive are simulated by LS-DYNA code, and the simulated and experimental results are compared. The boundary expansionstate of fuel and the process of shell breakage are obtained. The variation of cutting force with time and the maximum dispersing ve- locity of different shell structures are analyzed. Results show that the dispersing velocity of fuel could be effectively increased by enhancing the axial tension while satisfying the structural strength and the same radial strength. When axial tension is up to 0.7×10^6 N, the greater dispersing velocity could be pro- duced by stiffener structure. The maximum dispersing velocity of non-stiffener structure is 285.3 m/s. The maximum dispersing velocity of stiffener structure is 316.3 m/s, that could be increased by 10.8% with the same dose for non-stiffener structure.

关 键 词：兵器科学与技术 有加强杆结构 无加强杆结构 抛撒速率 数值模拟 

分 类 号：TJ410.33[兵器科学与技术—火炮、自动武器与弹药工程]