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《Journal of Vibration and Shock》 2015-22
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Effects of bird's striking orientation on bird impact analysis based on a realistic bird model

ZHANG Da-hai;FEI Qing-guo;LIU Hong-yue;Department of Engineering Mechanics,Southeast University;Jiangsu Provincial Key Laboratory of Engineering Mechanics;  
Bird shape and strike orientation are two very important factors affecting the accuracy of bird strike analysis. The realistic bird has a complex configuration and there are different bird types with different body shapes,so researchers often use simple configurations to model birds in bird strike events. There are four substitute bird models mostfrequently employed in literatures,they are sphere,straight-ended cylinder,hemispherical-ended cylinder and ellipsoid.During a bird strike event,a bird can strike an airplane from its head,tail,abdomen or wings. These orientations have different effects on the response of an airplane part. Firstly,a realistic bird model was established to study the effect of its strike orientation. The results obtained by using the four substitute bird models were compared with those using a realistic bird model in order to determine the best substitute bird model for modeling the force exerted by a real bird with different strike orientations. It was shown that the striking orientation of a bird has a big influence on the impact force; the impact force obtained by striking from abdomen is the largest and the impact duration is the shortest while those obtained by striking from head and tail are relatively less; meanwhile,the kinetic energy loss of bird tends to be most and fastest for striking from abdomen,for strikings from wing and tail they are second,for striking from head it is the smallest; besides,for string from tail,a hemispherical-ended cylinder model has the best results and for striking from abdomen,an ellipsoid model striking from its long side is the best substitute model,while for striking from head and wing,no substitute models are better.
【CateGory Index】: V328
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【Citations】
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9 ZHANG Hai-yang;YU Duo-kui;WANG Xiang-ping;YI Feng;LI Gen;Shenyang Aeroengine Research Institute;;Numerical and Experimental Investigation of Damage of Bird Impact on Fan Blades[J];推进技术;2015-09
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