Armored helicopter as a strategic attack and defense weapon in the battlefield,armor is the typical way for protection.At present,the protective ability of helicopter armor is expressed by the protective distance and the maximum protective size of bullet when the bullet is incident vertical-ly.However,it is found that it is impossible for the bullet to strike in the way of vertical incident.So the actual protective ability of armor has not been maximized.In this paper,the protection law of currently used helicopters ceramic composite armor under typical attack angle was researched by de-sign envelope test method.After analysis,the feasible design idea to improve the protective ability was presented.Under the angle of 15°,the protective ability could be improved by 19.1%.
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