The damage characteristics of missile rudder fins subjected to projectile penetration under varying conditions are studied.The damage characteristics of a typical missile rudder fin penetrated by an ogive-nose projectile at different striking velocities and impact angles are numerically simulated.The effects of projectile initial velocity and penetration angle on the damage area and surface indentation depth of rudder fins are systematically analyzed.Results demonstrate that the degrees of damage of rudder fins under the different initial velocities and penetration angles of projectile significantly vary.Five characteristic failure modes of rudder fins
i.e.
skin deformation
perforation damage
frame deformation
frame fracture and large-area tearing.are identified.High-velocity penetration induces larger damage areas and higher perforation propensity
leading to more severe structural compromise.At constant projectile initial velocity
the increased penetration angles promote ricochet phenomena
thereby reducing the damage severity.Notably
under high-velocity conditions
the steep impact angles trigger an extensive tearing damage via projectile deflection and material extrusion
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