同体积不同材质BB弹枪口比动能大小的比较研究

Comparison of Energy Density Obtained from Four Kinds of BB Projectiles Fired from Same One Airsoft Gun

目的研究同一支弹簧活塞式BB枪发射同体积不同材质弹丸时弹丸枪口比动能的差异及其大小关系。方法利用弹簧活塞式BB枪发射4种不同材质的同体积球形弹丸(玻璃弹丸、铝质弹丸、塑料BB弹和轴承钢珠),利用激光测速仪对弹丸进行测速,并利用枪口比动能计算公式计算弹丸的枪口比动能,将数据按材质分为4组,比较各组数据有无统计学差异及其大小排序。结果同体积不同材质的球形弹丸经本实验采用的弹簧活塞式BB枪发射后,弹丸枪口比动能大小有显著差异,由大到小顺序为塑料BB弹>玻璃弹丸>铝质弹丸>轴承钢珠。结论弹丸材质影响BB枪枪口比动能的测算结果,应对现有枪支检验鉴定行业标准进一步规范化处理,增强检验鉴定科学性,规避鉴定风险。

Objective To probe the difference of energy density at the muzzle where and when the cubage-same-butmaterial-various pills are bursting out from the same one spring piston-driven BB gun,and explore the relationship ofmagnitude among the energy densities.Methods A6.00mm spring piston BB gun was chosen to stochastically fire four kindsof round projectiles which were made of glass,aluminum,plastic and steel.The velocity of each projectile was measured bya laser velocimeter.Each projectile’s energy density was calculated through the relevant given formula,with all the obtainedenergy density values to be divided into four groups according to the projectile’s material and the values descending fromlarge to small.The differences between the four discrepant groups were analyzed by IBM SPSS.Results The values of energydensity of the fired6.00mm round projectiles are significantly different.The magnitude order is as plastic BB at the first,then consecutively followed by the pills of glass,aluminum and steel from large to small according to their energy densityvalues.For the airsoft gun in this study,the highest energy density is2.56J/cm2,acquired from the plastic BB,and the lowestbeing0.91J/cm2from the steel ball.Conclusion The material-different projectiles,fired by the same one airsoft gun,producedifferent energy density values,indeed.