桨毂三维有限元应力分析

某型螺旋桨毂坐标系的确定,此桨毂为整体形结构,沿径向均匀装置四个桨叶,如图1所示,以飞机飞行方向定位,桨毂旋转平面定为XOY平面,沿桨叶轴线方向为X轴坐标,在旋转平面内与X轴垂直方向为Y坐标,Z轴坐标则为通过旋转轴心而与飞行方向相反的轴线。在旋转平面的后端面,用端齿与发动机主轴连接,以传递扭矩及轴向位伸;其前端面安装螺旋桨整流罩,罩内装置液压调节活塞,整体结构内为空心,桨叶变距机构由此空间操纵四个桨叶。桨叶的离心力和气动力通过桨轴传递至桨毂。 

STRESS ANALYSIS OF A PROPELLER HUB

Three dimensional finite element method is applied to stress analysis of a propeller hub taking centrifugal load,aerodynamical moment and blade centrifugal tension load.Since its construction is complicated,loads are various and its stress distribution is hard to analyze,the elastic stress plus principle is employed for this purpose.The analytical results show that the blade centrifugal tension load is predominant and its construction has been optimized to a certain extent due to current improvements during long time of its service and modifications so the stress distributions of its parts are quite even and reasonable,moreover safety coefficients are large enough.