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转子系统的不对中问题在旋转机械中非常普遍,是引起严重整机振动的主要原因之一.特别地,以先进涡扇发动机转子系统为代表的带有弹性支承、内外布置的多转子系统,其动力学特性具有特殊性,不对中的理论问题与工程需求十分突出.本文首先针对两类不对中问题(联轴器不对中和支点不对中),评述了目前不对中建模方法、不对中转子系统的动力学和振动特性方面的代表性研究成果.其次,针对航空发动机转子系统,详细综述了目前已有的套齿联轴器、弹性支承组件的动力学研究成果.在此基础上,作者针对其具体结构特征,进行了航空发动机转子系统不对中成因与模式分类,初步建立了联轴器不对中和支点不对中的转子系统动力学模型并进行了振动特性分析.
Rotor system misalignment is very common in rotating machinery, which is one of the main causes of serious machine vibration.In particular, with advanced turbofan engine rotor system represented by a flexible support, multi-rotor system arranged inside and outside, Its dynamics characteristics are special, and the mismatched theoretical problems and engineering requirements are very prominent.This paper first focuses on two types of misalignment problems (misalignment of couplings and misalignment of pivots), reviews current misalignment modeling methods, misalignment Rotor system dynamics and vibration characteristics of the representative research results.Secondly, aeroengine rotor system, a detailed overview of the existing sets of gear couplings, elastic support components of the dynamics of the research results.On this basis, According to its specific structural features, the author made a study on the cause of misalignment and pattern classification of aeroengine rotor system. The rotor system dynamics model of misalignment of coupling and misalignment of the rotor was preliminarily established and the vibration characteristics were analyzed.