金属蒙皮飞机冲击威胁研究  

A study on the impact threat of metal skin aircrafts

作　　者：王守财 关志东[1] 黎增山[1] 黄骁[1] WANG Shoucai;GUAN Zhidong;LI Zengshan;HUANG Xiao(School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《振动与冲击》2018年第4期13-18,共6页Journal of Vibration and Shock

摘　　要：飞机服役中会遭受外来物冲击威胁,对机身蒙皮造成冲击损伤。分别对国内南北方两航空公司的飞机维修记录进行了调研,得到了金属蒙皮飞机飞行过程中的冲击损伤分布规律;基于ABAQUS软件建立有限元模型,采用不含损伤的Johnson-Cook本构模型,研究铝板的低速冲击响应特性,设计并实施铝板低速冲击试验,对模型可用性进行了验证;得到了凹坑深度逆向推导冲击能量的计算公式,将损伤凹坑深度数据转化为冲击能量,并估算在一定概率水平下,金属蒙皮飞机可能遇到的最大冲击能量。结果显示,冲击能量较小时,铝板凹坑深度与冲击能量近似为线性关系;在指定的概率水平下,机翼、机身、翼身整体的最大冲击能量分别为21.3 J,25.5 J,33.8 J。Aircrafts suffer from the impact threat of external objects,which cause damages to the fuselage skin.Maintenance records of two domestic aviation companies were investigated,from which the damage information and its distribution regularity was obtained.Based on the software ABAQUS,a finite element model was developed.The Johnson-Cook constitutive model with no damage was used to study the performance of panels with low-velocity impact.The low-velocity impact test of aluminum plate was designed and implemented to verify the usefulness of the model.The formula to compute the impact energy from dents depth was obtained,and the damage dents were turned into impact energy.The maximum energy that metal skin aircrafts may encounter was estimated under a certain level.The results show that the depth of the dents is proportional to impact energy when the impact energy is small.At the specified probability level,the maximum impact energy of the wing,fuselage and the whole aircraft is 21.3 J,25.5 J,33.8 J,respectively.

关 键 词：冲击威胁 损伤分布 凹坑 概率 

分 类 号：V257[一般工业技术—材料科学与工程]