In order to study the impacts of warhead geometry and initiation pattern on the lethality of aimable warhead, multi-point synchronous initiated hexagonal prism and cylindrical warheads were compared through numerical ...In order to study the impacts of warhead geometry and initiation pattern on the lethality of aimable warhead, multi-point synchronous initiated hexagonal prism and cylindrical warheads were compared through numerical simulation, combined with theoretical formulas of fragment decelera- tion and target plugging. Enhancements of fragment velocity, kinetic energy and density toward the target and target destructions were analyzed. The results show that hexagonal prism warhead can produce dense fragment beams and enhance average velocity and kinetic energy with asymmetric eight-point initiation by 24. 13% and 54. 52% respectively, which are higher than those of the isomet- ric or same weight cylindrical warhead. The effective fragments are still relatively concentrated in an area of 8 m × 2 m for the hexagonal prism warhead when the distance between warhead and target is 40 m.展开更多
The ultimate goal of weapon system employing an explosively formed penetrator(EFP) is to defeat a target at the longest standoff.In order to do this,an EFP must be aerodynamically stable so as to strike the target at ...The ultimate goal of weapon system employing an explosively formed penetrator(EFP) is to defeat a target at the longest standoff.In order to do this,an EFP must be aerodynamically stable so as to strike the target at a small angle of obliquity,and the decay velocity per meter of EFP must be smaller at extended standoff.As the angle of attack increases,the penetration ability of EFP greatly reduces.The fins improve the EFP aeroballistic characteristics and decrease the flight drag of EFP as well.EFP with fins formed by three-point initiation is presented.The formation of EFP with fins is studied by LS-DYNA,and the aeroballistics is studied through experiment.The experimental results show that the decay velocity per meter of EFP with fins is much smaller than that of normal EFP.and the attitude angle steadily decreases.展开更多
文摘In order to study the impacts of warhead geometry and initiation pattern on the lethality of aimable warhead, multi-point synchronous initiated hexagonal prism and cylindrical warheads were compared through numerical simulation, combined with theoretical formulas of fragment decelera- tion and target plugging. Enhancements of fragment velocity, kinetic energy and density toward the target and target destructions were analyzed. The results show that hexagonal prism warhead can produce dense fragment beams and enhance average velocity and kinetic energy with asymmetric eight-point initiation by 24. 13% and 54. 52% respectively, which are higher than those of the isomet- ric or same weight cylindrical warhead. The effective fragments are still relatively concentrated in an area of 8 m × 2 m for the hexagonal prism warhead when the distance between warhead and target is 40 m.
文摘The ultimate goal of weapon system employing an explosively formed penetrator(EFP) is to defeat a target at the longest standoff.In order to do this,an EFP must be aerodynamically stable so as to strike the target at a small angle of obliquity,and the decay velocity per meter of EFP must be smaller at extended standoff.As the angle of attack increases,the penetration ability of EFP greatly reduces.The fins improve the EFP aeroballistic characteristics and decrease the flight drag of EFP as well.EFP with fins formed by three-point initiation is presented.The formation of EFP with fins is studied by LS-DYNA,and the aeroballistics is studied through experiment.The experimental results show that the decay velocity per meter of EFP with fins is much smaller than that of normal EFP.and the attitude angle steadily decreases.
