复合材料旋翼桨叶固有特性和气弹稳定性分析

Analysis of natural characteristic and aeroelastic stability with a composite rotor blade

以专用旋翼桨叶建模与参数计算软件和直升机旋翼计算分析软件CAMRADII为基础,以某复合材料旋翼桨叶为例,对复合材料旋翼桨叶结构固有特性与气动弹性问题进行了分析。结果表明,桨叶挥舞频率随着转速提高而增大,扭转和摆振频率随转速变化可以忽略,桨叶各阶频率随着变距角增大变化很小。额定状态下桨叶固有特性和气动弹性稳定性均满足设计要求,不会发生共振或者气动弹性不稳定的情况。

With the special finite element software CAMRADII and software of blade modeling and parameter calculation, this paper compute and analysis the structural natural characteristic and aeroelastic stability response of rotor blade.Natural characteristic and aeroelastic analysis of rotor blade indicate follow conclusions. Flap frequency of blade increases as the rotor speed raises, while lag frequency and torsion frequency remain unchanged. Blade frequencies hardly change while the pitch angle verifies. Design requirements of natural char- acteristicand aeroelastic stabilities are fulfilled on rated condition without any unstable phenomenon.