涡轴发动机动力涡轮转子动力特性研究

Dynamic Characteristics Study of a Power Turbine Rotor of a Turbine Shaft Engine

应用有限元方法建立了某新型涡轴发动机动力涡轮转子动力特性的计算模型,对转子在不同情况下的动力特性——临界转速、振型和不平衡响应分别进行了系统的计算分析,得到了转子的前5阶临界转速、前5阶主振型和前两阶不平衡响应曲线,并计算了平衡卡箍对转子动力特性的影响。试验表明:计算模型能真实反映转子的动力特性。研究结果为转子的后续高速动平衡试验提供了参考和依据。

This paper studies dynamic characteristics of a power turbine rotor of a new-type turbine shaft engine when finite element method is used.The dynamic characteristics of the rotor in different conditions,such as critical speeds,vibration shapes and unbalance responses,are respectively systematically calculated and analyzed.The first five-stage critical speeds,the curves of the first five-stage dominant vibration shapes and the first two-stage unbalance responses of the rotor are obtained.Furthermore,the influences of balance collars on dynamic characteristics of the rotor are also calculated.The experimental results show that the calculation model can factually express the dynamic characteristics of the rotor.This study provides references and bases for subsequent high speed dynamic balance of the rotor.