反向旋转双转子稳态响应计算分析与试验

Numerical analysis and experiment of counter-rotating dual-rotor's steady-state response

航空发动机采用反向旋转的双转子系统,有助于减小转子整体陀螺力矩对飞机的影响,降低机匣负荷,提高飞机机动性能.分析了一种具有中介轴承的反向旋转双转子结构的稳态响应,其中介轴承外圈与低压转子联接,内圈与高压转子联接.针对这种结构,应用传递矩阵法,结合边界条件,分析了反向旋转双转子结构稳态不平衡响应的变化规律,研究了内、外转子盘轴心轨迹和质心的变化特点,并进行了相应的试验研究,验证了计算仿真的相关结论.

The counter-rotating dual-rotor system in aeroengines can reduce the influence of rotors＇ gyroscopic moments on aircrafts, cut down the torque of cases and improve the flexibility of airplanes. The steady-state response of a counter-rotating dual-rotor structure with one inter-shaft bearing was analyzed, of which the low pressure rotor is coupled with the inter-shaft hearing＇s outer ring,and the high pressure rotor coupled with the intershaft bearing＇s inner ring. By using transfer matrix method and corresponding boundary conditions,the steady-state responses of the counter-rotating dual-rotor system were analyzed, and the changing characteristics of the disks＇ orbits and the centroids＇ locations were studied experimentally, proving the relevant conclusions from calculations.