长杆高速侵彻的特征控制参量分析

For ideal long-rod penetration, by analyzing the approximate solutions of the Alekseevskii-Tate model for long-rod penetration, it is pointed out that the single deceleration index α is not sufficient to fully describle the quasi-steady process of long-rod penetration. This paper redefines two dimensionless parameters, namely Johnson demage parameter Φ_Jp and characteristic time parameter β, and α=β/Φ_Jp. The analysis shows that two characteristic parameters Φ_Jp and β (or α and β) can completely characterize the impact velocity of the projectile tail in the quasi-steady process of long-rod penetration. If the dimensionless critical impact velocity v_c* is introduced, the quasi-steady process of long-rod penetration can be fully characterized. In addition, this paper strictly proves that the degree of deviation from the steady state in the penetration process can be determined by α, and confirms that by determining Φ_Jp and β (or α and β), the design of long-rod penetration can be guided for offensive and defensive needs.