一种枪械射弹散布预测方法

Prediction Technique for Dispersion of Gun

为了在设计阶段预测枪械的射弹散布,缩短研制周期,提出了一种基于协同仿真模型的枪械射弹散布预测方法。通过枪械随机内弹道模型、弹/枪相互作用模型和外弹道模型之间的参数传递,构建了枪械协同仿真模型。将随机内弹道模型计算得到的随机膛压变化值传递给弹/枪相互作用模型,使弹丸出膛时的质心初速偏角发生变化;再将初速偏角值传递给外弹道模型,得到相应的射弹散布。仿真结果表明:弹丸质心速度的横向偏角较小,但纵向偏角最大可达到0.21°;该协同仿真法得到的100 m立靶处射弹散布与实弹射击结果相比,误差小于13%,验证了该枪械射弹散布预测方法的准确性。

In order to predict the dispersion of gun during the design phase to decrease development period,the prediction technique based on co-simulation model was proposed. The co-simulation model was built by random internal ballistic model,barrel-bullet finite element model and external ballistic model. The connections of different models were built by transferring parameter. The chamber pressure in barrel-bullet finite element model was obtained from random internal ballistic model. The parameter in external ballistic model was obtained from barrel-bullet finite element model and internal ballistic model. The co-simulation results show that the max muzzle angle of bullet velocity can be up to 0.21° in the vertical direction,but the angle is smaller in the horizontal direction. The error of dispersion circle on the target at the 100 meter is less than 13%. The results agree well with the experimental results and verify the new prediction technique.