摘要
为解决破片着靶姿态数据不全或缺失而不能开展仿真验模以及临界穿透仿真标准欠缺的问题,从能量的角度出发,提出了以破片比动能作为仿真验模的参量,并构建了破片完全贯穿、嵌入其中和临界穿透这 3 类毁伤模式的仿真验模精度公式.基于破片侵彻损耗能量公式,建立了破片速度增量与临界穿透速度、破片余速以及破片速度增长比率间的关系式.结果表明:对于破片完全贯穿模式,在缺乏破片着靶姿态数据的情况下,验模参量为破片比动能;破片临界穿透模式的仿真验模参量为破片比动能;用于验模对比的破片试验速度越高,仿真验模的可实施性越强;临界穿透速度为70m/s及其以上的弹-靶系统的破片临界穿透仿真余速标准值建议为20 m/s.
Abstract
Due to incomplete or missing attitude data of fragments while hitting the target,and the lack of simulation standards for critical penetration problems,it is difficult to validate simulation models precisely.In order to address the above problem,a parameter for the simulation model verification by using specific kinetic energy of fragment is proposed from the perspective of energy.Meanwhile,accuracy formulas for simulation model verification are constructed for three types of damage modes such as the complete penetration,embedding,and critical penetration of fragments.Based on the energy formula for fragment penetration loss,a relationship among the velocity increment of fragment and velocity of critical penetration,residual velocity of fragment,and growth ratio of fragment velocity is established.The results indicate that,for the complete penetration mode of fragment and in the absence of attitude data of fragments while hitting the target,the parameter for the simulation model verification is the specific kinetic energy of fragment.In addition,for the mode of critical penetration of fragments,the parameter for the simulation model verification is the specific kinetic energy of fragment as well.The higher the velocity of fragment testing used for the comparison between simulation and experiment,the stronger the feasibility of simulation model verification.For a missile-target system with a critical penetration velocity of 70 m/s or above,the standard value of residual velocity for the critical penetration of fragment is recommended as 20 m/s.
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