反弹道非正侵彻的弹体结构响应实验研究

Structural Response of Projectile in Reverse Ballistic Non-normal Penetrating Experiment

为研究高速侵彻弹体的瞬态结构响应,利用反弹道实验技术和数字图像相关测试方法,在?152mm轻气炮加载平台上建立了结构弹体非正侵彻2024铝靶的反弹道实验系统。通过弹体侵彻铝靶实验,获得弹体在反弹道非正侵彻过程中的实时响应特性,对比倾角、攻角及倾角与攻角联合侵彻作用下的弹体响应特征,得到了不同侵彻条件下弹体结构的定量响应规律。研究结果表明:攻角对弹体结构弯曲响应的影响更明显,3°攻角侵彻后弹体端部挠度大于10°倾角侵彻的结果,5°攻角大于15°倾角的侵彻结果;5°攻角联合15°倾角的侵彻条件下,弹体头部前1/4处轴向塑性应变可达4.6%,尾部均为弹性变形。

To research the transient structural response of high-speed projectile,the reverse ballistic experiments of projectile abnormally penetrating into the 2024 Al target were carried out based on?152 mm gas gun launching system,and a digital image correlation method was used to measure the real-time response of projectile in the experiment.The responses of projectile at the penetration conditions of oblique angle,attrack angle,and both oblique and attack angles were compared to obtain the response rules of projectile at different impact conditions.The research results show that the effect of 3°attack angle penetration on the bending response of projectile body is more obvious than that of 10°oblique angle penetration,and the penetration effect at 5°attack angle is more obvious than that at 15°oblique angle penetration on it.The analysis of penetration condition at 5°attack angle and 15°oblique angle shows that the axial elastic strain 1/4 of the projectile nose is 4.6%,and there is only elastic deformation in the projectile tail.