双级涡轮组件结构状态对高速转子动力特性影响  

Influences of configuration state of double-stage turbine assembly on rotor dynamic characteristics

作　　者：马艳红[2] 李毅沣 陈雪骑 王永锋 洪杰[1,2] MA Yanhong;LI Yifeng;CHEN Xueqi;WANG Yongfeng;HONG Jie(School of Energy and Power Engineering,Beihang University,Beijing 102206,China;Research Institute of Aero-Engine,Beihang University,Beijing 102206,China)

机构地区：[1]北京航空航天大学能源与动力工程学院,北京102206 [2]北京航空航天大学航空发动机研究院,北京102206

出　　处：《航空动力学报》2024年第11期1-10,共10页Journal of Aerospace Power

基　　金：国家科技重大专项(2017-Ⅳ-0011-0048,2017-Ⅰ-0008-0009)。

摘　　要：针对采用双级涡轮设计的高速转子,研究双级涡轮组件结构状态变化对转子动力特性的影响。通过表征工作载荷对双级涡轮组件界面接触状态和局部角向刚度-变形特征的影响过程,建立了双级涡轮组件结构状态分析模型,揭示了组件结构状态变化的力学机理;建立组件结构状态在转子动力学模型中的等效方法,研究其对转子固有振动特性的影响。研究表明:复杂工作载荷作用下组件中各构件变形的不协调,将引起的连接界面接触力学特性变化,造成组件角向刚度特性的改变;在旋转惯性力矩作用下,涡轮组件角向刚度存在“突降”现象,使得转子弯曲模态振型陀螺效应和临界转速显著降低。仿真结果表明:考虑涡轮组件结构状态突变后,转子弯曲模态临界转速约下降17%。The influences of configuration state change of double-stage high-pressure turbine assembly on rotor dynamic characteristics were studied.By studying the influence process of the working load on the interface contact state and local angular stiffness-deformation characteristics of the double-stage turbine assembly,the configuration states analysis model of the double-stage turbine assembly was established,and the mechanical mechanism of the configuration state change of the assembly was revealed.An equivalent modeling method of rotor dynamics considering the configuration state of assembly was established,and its influences on the rotor dynamics characteristics were studied.The research showed that the uncoordinated deformation of each component in the assembly caused by the complex working load could cause the change of the interface contact mechanical properties and the angular stiffness characteristics of the assembly.Due to the effect of the rotating inertia moment,there was a“sudden drop”phenomenon in the angular stiffness of the double-turbine assembly,which significantly reduced gyroscopic effect and critical speed of the rotor bending mode.The simulation results showed that the critical rotational speed of the rotor bending mode decreased by about 17%after considering the sudden change in the configuration state of the double-turbine assembly.

关 键 词：双级涡轮组件 结构状态 界面接触状态 角向刚度 陀螺效应 临界转速 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]