Anti-impact characteristics and contrastive study of typical aircraft structures against hail and simulated bird projectile

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (18) : 307-314.

ZHANG Yu, WANG Binwen, BAI Chunyu, LIU Xiaochuan, GUO Jun

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Abstract

Here, to study anti-impact characteristics of typical aircraft horizontal stabilizer and wing leading edge structure against hail and simulated bird projectile, relevant tests were conducted with D80 air gun system to study effects of projectile velocity and structure type on anti-impact characteristics of the two structures against hail and simulated bird projectile.Based on the verified finite element model, contrastive study on anti-impact features of wind leading edge structure against hail and simulated bird projectile with equal kinetic energy was performed.The results showed that with increase in kinetic energy of hail and projectile, depth of impact crater and plastic deformation zone become larger, and they are much larger than diameters of hail and projectile;deformation trends of wing leading edge structures with different sizes are the same after impact, but the larger the curvature of leading edge, the larger the crater depth and plastic deformation zone; under impact of hail and projectile with equal kinetic energy, crater shapes and impact force-time curve trends formed due to hail and projectile impacting, respectively are consistent, but crater size and impact force load peak value due to impact of simulated bird projectile are larger; under the same conditions, threat of simulated bird projectile is larger, and it should be the main factor to be considered in structural design.

Key words

wing leading edge structure / horizontal stabilizer structure;hail impact / simulated bird projectile;impact characteristics

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ZHANG Yu, WANG Binwen, BAI Chunyu, LIU Xiaochuan, GUO Jun. Anti-impact characteristics and contrastive study of typical aircraft structures against hail and simulated bird projectile[J]. Journal of Vibration and Shock, 2021, 40(18): 307-314

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