钻地弹斜侵彻混凝土靶的工程计算模型

为了研究侵彻过程中钻地弹受力不对称性下的运动轨迹,结合动力学基本方程和经典空腔膨胀理论,基于层裂机理,建立了具有倾角和攻角相结合的卵形弹侵彻混凝土的工程模型。利用该模型得到了弹体头部运动轨迹与倾角、攻角以及速度的关系,结果表明侵彻深度随着倾角的增大而明显减小,弹体头部运动轨迹的弯曲弧度也越大;攻角越大,产生的偏转力矩越大。对工程模型进行试验验证,结果吻合较好,该模型能够有效地反映出斜侵彻过程的主要特征,进而说明该模型的适用性与合理性。

Engineering calculation model for oblique penetration into concrete target by earth penetration weapon

In order to study trajectory of earth penetration weapon during penetration under stress asymmetry, in combination of kinetic basic equations and classical cavity expansion theory, an engineering model of projectile penetrating into concrete with incident angle and yawed angle is established using surface splitting mechanism. The relationship between the trajectory of projectile head and yawed angle, incident angle and velocity is obtained using the model. The results show that the penetration depth decreases obviously with the increase of incident angle, and the curve arc of the projectile's head is larger. The deflection torque increases with the increase of yawed angle. The engineering model is verified by experiment, and the results are in good agreement with the experimental results. The model can effectively reflect the main characteristics of oblique penetration process. The applicability and rationality of the model are also proved.