高速转子系统支承结构及力学特性设计方法

针对航空发动机高速转子系统支承结构及力学特性设计问题，开展支承结构约束特性（支点位置和支承刚度）对转子系统刚度及转子动力学特性的影响分析，建立转子支承结构约束特性与转子力学特性关联力学模型。通过对转子系统支承结构特征参数与刚度特性、振动特性等力学特性的关联性分析，定量描述了转子支承约束特征及轮盘惯性载荷对转子系统动力学特性的影响规律，在此基础上，提出了基于转子变形控制的支承约束特性与转子力学特性一体化设计方法。仿真计算结果表明:对于高速转子系统可以通过对支点位置及支承约束刚度的设计，调整转子弯曲变形和临界转速的分布特征，使其在通过或靠近弯曲振型临界转速的高转速工作状态下，具有足够的安全裕度。这种通过结构特征参数的变化，优化转子系统力学特性的方法，对航空发动机总体结构布局及动力学设计具有重要的工程参考价值。 

Design method for bearing-support structure and mechanical properties of high-speed rotor system

For the optimization design of the structure and mechanical properties of the high-speed areo-engine rotor system, the influence of bearing-support properties (supporting point and supporting stiffness) on the rotor stiffness and dynamics was studied, and the correlation model for the bearing-support structure and rotor dynamics properties was established. The correlation between bearing-support parameters and mechanical properties, including the rotor stiffness, vibration, was analyzed. The influences of bearing-support properties and inertia load of rotating disc on rotor dynamics were quantitatively described, and the optimization design method and flow of bearing-support structure and rotor dynamics were presented. The numerical simulation result shows that the bearing-support structure properties method could determine the supporting point and supporting stiffness, and improve the stuffiness and vibration properties. This method is highly feasible, and beneficial to improve the design efficiency, and has important reference value for design of areo-engine overall structural layout and structural dynamics.