航空发动机高速球轴承动态特性分析

 高速滚动轴承的动态特性对航空发动机转子系统的性能有重要的影响，为尽可能真实模拟轴承实际运转情况，建立轴承零件相互作用模型得到各零件之间力和力矩，使用较精确的弹流模型计算拖动力，采用拟动力学法建立任意受载的球轴承动力学分析模型，提出了工程中非线性方程组的高效解法。编制调试了计算程序READ ( Rolling Element bearing Advanced Dynamics tool)，以276927NK1W1(H)航空轴承为算例分析了工况参数和结构参数对滚动轴承动态特性的影响规律，最后通过Gupta的动力学程序算例验证了程序的准确性。轴承动态特性的研究为研究航空发动机转子轴承集成系统动态性能分析奠定了基础。

Analysis on Dynamic Characteristics of Aero-engine High-speed Ball Bearings

The dynamic characteristics of ball bearings at high speed have important effects on the rotor system of aero-engine. In order to simulate the actual working conditions, the dynamic analysis model of ball bearings under arbitrary loads is established by quasi-dynamic method, by which forces and moments are obtained from inter-action model of bearing parts, and the traction force is computed by an accurate traction model. The efficient solution method of nonlinear equations is proposed. A program named rolling element bearing advanced dynamics tool(READ) is developed. Taking type 276927NK1W1(H) bearing as an example, the effect rules of different operating condition parameters and bearing structure parameters for the dynamic characteristics of ball bearings are analyzed by the program. Finally, the accuracy of the program is verified by the computation example of Gupta. The study of dynamic characteristics of ball bearings establishes the foundation for the further study of dynamic characteristic analysis of rotor-bearing integration system.