一种特殊条件下航空炸弹弹道特征数的符合计算

Coincidental Calculation of Aviation Bomb Trajectory Characteristic Parameter on Certain Conditions

针对某型战机上挂载使用某型航空炸弹的问题,提出了一种炸弹弹道系数的符合计算方法。该方法选用航空炸弹质点弹道模型,采用虚拟风洞数值模拟得到的炸弹阻力定律,结合实弹靶试数据,对弹道系数进行了符合计算。该符合计算方法下的射程误差在1%以内。文中弹道模型可能适用其它质点弹道模型,选用的弹道模型与阻力定律同某型飞机火控弹道模型和阻力定律越是一致,符合计算出的弹道特征数就越有实用价值。在挂载航空火箭弹或采用航炮炮弹时,可考虑选用西亚切阻力定律。对于航空子母弹、带降落伞的低空高阻炸弹,可符合计算出它们相应的等效弹道的弹道特征数。

In this paper aimed at the application problem of certain aviation bomb for a certain fighter, a coincidental calculation method of bomb ballistic coefficient is proposed. In the method particle trajectory model of certain aviation bomb is chosen, drag law by the numerical simulation based on the virtual wind - tunnel is adopted. Com- bined with the ball firing data, the coincidental ballistic coefficient is calculated. The range error based on the coincidental calculation method does not exceed 1%, the method is effective and also applicable to other non - control aviation bombs. In this research, the other particle trajectory models are also available. The more the trajectory mod- el and drag law are consistent with those in the fire control computer, the more the trajectory characteristic parameter is of practical value. Considering aviation rocket or bullet, Siacci drag law could be adopted. With regard to aviation scatter bomb and low altitude high - drag parachute bomb, the corresponding characteristic parameter of equivalent trajectory could be obtained.