冲击波和破片对直升机旋翼的联合毁伤研究
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摘要
为研究冲击波和破片对直升机旋翼的联合毁伤,对旋翼结构进行分析,建立了两毁伤元共同作用下旋翼的毁伤模型,计算了装药量、炸点位置及破片穿孔密度等因素对旋翼毁伤的影响。研究表明:旋翼根部为最危险截面,炸点横向位置在旋翼展长中心线时旋翼根部应力最大;旋翼毁伤程度随炸点纵向距离的增大而逐渐减小,随装药量及破片穿孔密度的增加而逐渐增大;得出了冲击波和破片联合作用下旋翼毁伤的临界判据。
In order to study the combined damage of blast and fragments on helicopter rotor,the rotor structure was analyzed;The damage model of the rotor structure by blast wave and fragments was built.The effects of explosive charge,explosion position,perforation density on damage of rotor were calculated.The results show that the most dangerous section of rotor is in the root of rotor.The stress of the rotor root is maximum when explosion horizontal position is at the centerline of wingspan;The damage of rotor decreases with the increasing of explosion vertical position;The damage of rotor increases with the increasing of explosive charge and perforation density;The critical damage curves of rotor are drawn.
In order to study the combined damage of blast and fragments on helicopter rotor,the rotor structure was analyzed;The damage model of the rotor structure by blast wave and fragments was built.The effects of explosive charge,explosion position,perforation density on damage of rotor were calculated.The results show that the most dangerous section of rotor is in the root of rotor.The stress of the rotor root is maximum when explosion horizontal position is at the centerline of wingspan;The damage of rotor decreases with the increasing of explosion vertical position;The damage of rotor increases with the increasing of explosive charge and perforation density;The critical damage curves of rotor are drawn.
引文
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[2]温海涛,关玉璞,高德平.直升机主桨叶的鸟撞有限元数值模拟[J].航空动力学报,2009,24(5):1150-1157.
[3]Abdul R Kiwan.An overview of high-explosive blast dam-age mechanisms and vulnerability prediction methods[M].Storming Media,1997:321-328.
[4]裴扬,宋笔锋,李占科.爆炸冲击波对目标的毁伤概率算法研究[J].西北工业大学学报,2003,21(6):703-706.
[5]赵国志,张运法,沈培辉.常规战斗部系统工程设计[M].南京:南京理工大学出版社,2000:246-249.
[6]Gibaon LJ,Ashby MF,Schajer GS.The mechanics of two-dimension cellular materials[J].Proc RSor,1982,A382:25-42.