Damage Assessment Of Typical Warhead To Aircraft

As the main military force in modern warfare,the fighter plays a vital role in battlefield power contrast,and it is very important for the study of fighter damage assessment in combat.In this paper,the typical four-generation fighter F-22 was taken as the target of damage assessment,and the research on the vulnerability analysis of the aircraft target,the equivalent damage experiment and damage numerical simulation are carried out.(1)Based on the analysis of F-22 aircraft main performance parameters,component structure,operational tasks and functional characteristics,the damage effect of aircraft components were analyzed,and the damage tree of the structure of the aircraft were established to calculate damage probability.(2)The experimental research on the damage effect of aircraft wings is carried out.Based on the structural characteristics of aircraft wings,the equivalent targets of wings are designed,and the destructive damage law of target under different shock wave intensities is obtained.Experimental results show that the LY-12 hard aluminum equivalent skin and the carbon fiber equivalent skin have different failure modes,and the dynamic deformation process of the aluminum plate under the impact load is observed,and new formula for the overpressure of the close-range explosion is proposed.(3)Based on the experimental data,the damage numerical simulation of the wing structure equivalent target under different shock wave loads was carried out by using the finite element software LS-DYNA.A simulation method of explosive load with negative pressure area was proposed,and the simulation results are in good agreement with the experimental results.(4)The warhead's power and the projectile are carried out.The visualization of the missile-target encounter is realized by programming.The damage parameter and the damage grade of the damage element are calculated in the typical condition.And the quick evaluation of damage rating is realized.The research content of this subject has certain reference value both for the damage of the aircraft target in the war and the survivability optimization design of the aircraft protection design.