低伸弹道的外弹道相似条件和模拟试验研究

相似模拟是一种较为有效的试验研究方法。基于第4类外弹道相似性,分析了低伸弹道情况下小口径模拟弹和中、大口径基本弹在飞行速度和飞行距离、转速、章动特性等方面的相似关系,建立了满足不同相似关系的相似条件,确定了以靶道内的小弹飞行试验模拟大弹实际飞行试验的试验方法,建立了试验数据拟合模型。试验数据表明:小口径模拟弹和中、大口径基本弹的外弹道相似性良好。研究结果为外弹道相似理论在弹药外弹道设计中的应用提供了理论依据。

Research on Similar Conditions and Simulative Experiments of Exterior Ballistics for Low Trajectory

Similar simulation is an efficient experimental research method. Based on the fourth similarity of exterior ballistics, the similarity relationships between small-caliber simulative projectiles and medium-caliber former projectiles were analyzed in the case of low trajectory. The similar ballistic parameters of flight velocity and distance, rotational speed, and nutation property were researched. The corresponding similarity conditions were obtained. The exterior ballistics measuring method for similar simulation was worked out, and an experimental data fitting model was established. The experimental data shows that the ballistic parameters of small-caliber simulative projectiles and medium-caliber former projectiles are similar. All of these are useful for application of similar theory in exterior ballistics design.