通过建立的全桨叶有限元模型,研究了穿孔损伤的大小和方向对桨叶振动特性的影响.以桨叶根部z=50mm处矩形剖面和中部z=835 mm处翼型剖面为研究对象,分别在前缘、翼盒和后缘模拟不同口径的穿孔损伤,得到振动特性与穿孔损伤大小的关系,并通过改变前缘的穿孔损伤方向,得到振动特性与穿孔损伤方向的关系.结果表明,穿孔损伤一般不会引起各阶振动模态的改变,但会使各阶振动频率发生变化.随着损伤口径的增大,各阶振动频率都降低.损伤发生在前缘和后缘,摆振频率降低最多,发生在翼盒,扭转频率降低最多.穿孔方向对各阶振动频率的影响不仅与损伤的位置和结构有关,还与损伤剖面的几何形状有关.对于根部矩形削面,穿孔方向与剖面弦向夹角为75°和105°对摆振频率影响最大,对于中部翼型剖面,夹角接近0°(180°)对摆振频率影响最大.
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