空投雷弹斜入水初始弹道数值分析  

Numerical Analysis for Initial Hydroballistics of Airborne Missile During Oblique Water-entry Impact

作　　者：王永虎[1] 石秀华[2] 

机构地区：[1]中国民航飞行学院,四川广汉618307 [2]西北工业大学航海学院,西安710072

出　　处：《弹道学报》2012年第2期92-95,共4页Journal of Ballistics

基　　金：校科研基金项目(J2010-78;J2011-03)

摘　　要：为了研究空投雷弹斜入水的水下弹道动态特性,采用有限元分析程序ANSYS/LS-DYNA显式动力方法建立了斜入水数值模型,利用ALE算法和ALE-Lagrange耦合运算功能数值模拟了入水初始弹道,分析了尖拱体斜入水初始条件对水下初始弹道的影响,以及网格划分尺寸与数值计算稳定性的关系以确保结论的正确性.数值结果表明,小质量尖拱体小角度斜入水会引起水下初始弹道大偏移,可以通过调节质量或入水姿态来抑制忽扑甚至弹跳行为,初始入水弹道依靠于入水初始条件.To study dynamic mechanical properties of the oblique water-entry hydroballistics of airborne missile, numerical simulation was carried out based on the dynamic explicit finite element program-ANSYS/LS-DYNA. The initial water-entry hydroballistics was simulated by using the ALE algorithm and ALE-Lagrange coupling method. The effects on the hydroballistics of the oblique water-entry ogive were analyzed in case of the changes of water-entry angle, the initial angle of attack and so on. The mesh size and precision control were studied in order to get compu- tational stability and exact results of simulation calculation. The small-angle oblique water-entry of light-weight airborne missile with ogive head can cause deflection of initial hydroballistics,and the situations of weight and appropriate water-entry attitude are controlled to avoid whip and ricochet,and the initial hydroballistic properties depend on the initial conditions.

关 键 词：水弹道 斜入水 空投雷弹 流固耦合 数值分析 

分 类 号：TJ630.1[兵器科学与技术—武器系统与运用工程]