Abstract Based on the multi-support mode of low-pressure rotor and fan rotor of gearbox in GTF (Geared turbofan engine), the coupling gear-rotor-bearing dynamics model is established in this paper. The effect of bearings on both rotors on the dynamic behavior of the GTF transmission system have been explored and quantified, especially for the influence of location of bearings on both rotors on the load sharing behavior of the star gearing system in GTF gearbox. Axial, transverse and rotational motions of double-helical gears are included in the dynamic model, in which the time-varying support stiffness of bearings, the gear mesh stiffness with phase relationship between multiple meshes and comprehensive errors are fully considered. The results show that position of bearings on both rotors could affect the load sharing performance and maximum floating amounts of members in star gearing system of GTF gearbox, therefore, the location of bearings on rotors can be rearranged to achieve better performance in vibration control and load distribution of the system.

中文翻译：

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基于转子多支撑的GTF航空发动机耦合齿轮-转子-轴承系统均载行为研究

摘要 基于GTF（Geared turbofan engine）齿轮箱低压转子和风扇转子多支撑模式，建立齿轮-转子-轴承耦合动力学模型。两个转子上的轴承对 GTF 传动系统动态行为的影响已经进行了探索和量化，特别是两个转子上的轴承位置对 GTF 齿轮箱中星形齿轮系统负载分配行为的影响。动力学模型包含双斜齿轮的轴向、横向和旋转运动，充分考虑轴承时变支撑刚度、齿轮啮合刚度与多啮合相位关系和综合误差。