复合材料旋翼桨叶耦合振动分析

给出了包含陀螺力影响的旋转梁耦合振动问题有限元解法，使用的各向异性梁理论考虑了截面翘曲和耦合变形对截面刚度以及对动力特性的影响。单元形函数取向各向异性染的静态解，以利于提高计算精度。

Coupling dynamic analysis of composite rotor blade

The finite element formulation is presented for the coupling dynamic problem of rotor blades with the effect of gyroscopic forces. The anisotropic beam theory used includes the effects of the cross section warping and coupling deformations on the stiffness of cross section and on the dynamic properties of the beam. The shape function of beam element is taken as the static solution of beam, which is helpful to the improvement of accuracy. The computed frequencies of a box beam and a helicopter rotor blade are in good agreement with the reference values, which implies that the present method is correct.