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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。
In order to study the motion trajectory under the asymmetry of the earth-boring elastic force during penetration, combined with the basic equations of dynamics and the classical cavity expansion theory, based on the mechanism of the splitting, an ovoid projectile with combined angle of attack and angle of attack Concrete project model. The relationship between the projectile trajectory and the angle of attack, the angle of attack and the velocity was obtained by using this model. The results show that the penetration depth decreases obviously with the increase of the dip angle, and the curvature of the projectile ’s head trajectory also increases. The larger the angle of attack, the greater the resulting yaw moment. The experimental model is validated and the result is in good agreement. The model can effectively reflect the main features of the process of oblique penetration and further illustrate the applicability and rationality of the model.