航空学报2025，Vol.46Issue(24)：115-127,13.DOI:10.7527/S1000-6893.2025.32058
航空发动机复杂叶片碰摩仿真方法与动力学特性分析
Simulation method and dynamic characteristics analysis of complex blade rubbing in aero-engines
摘要
Abstract
This paper focuses on the research of the rubbing simulation method and dynamic characteristics of com-plex engine blades.Considering the influence of local blade contact and rotor whirl,a three-dimensional rubbing load and blade inertial load model is established through the spatial motion relationship.The above load model is as-sembled with the reduced-dimensional finite element model of the blade to obtain the rubbing dynamic equation.Com-bined with numerical solution techniques,a rubbing simulation method for complex engine blades is ultimately pro-posed.The proposed method is applied to conduct a rubbing analysis of the compressor blades of a certain aero-engine.The results show that tip rubbing can excite two rubbing states,which are related to the rubbing position.Dur-ing the leading edge of the blade tip rubbing,the intermittent rubbing of the blade is easily to be excited.At this time,the blade repeatedly contacts and separates from the casing,and the blade exhibits high-frequency and high-amplitude modal vibration at 8 000 Hz.During the trailing edge of the blade tip rubbing,the full circumferential rubbing is more likely to be excited,and the blade undergoes static deformation at this time.The non-synchronous whirl of the rotor significantly increases the nonlinearity of the blade rubbing behavior.The vibration frequency of the blade will have complex combined frequencies related to the whirl frequencies fe and fn.Reducing the rubbing stiffness and fric-tion coefficient can effectively suppress the overall vibration of the blade under tip rubbing.This paper can provide nec-essary theoretical method support for the dynamic analysis of aero-engine blades and clearance design.关键词
航空发动机/碰摩/三维叶片/振动特性/动力学模型Key words
aero-engine/rubbing/three-dimensional blade/vibration characteristics/dynamic model分类
航空航天引用本文复制引用
TAO Xuanjun,YU Pingchao,JIN Yize,XIANG Zhenyang,ZHANG Dayi..航空发动机复杂叶片碰摩仿真方法与动力学特性分析[J].航空学报,2025,46(24):115-127,13.基金项目
国家科技重大专项(J2022-Ⅳ-0005-0022) （J2022-Ⅳ-0005-0022）
国家自然科学基金(52372387) （52372387）
民航飞机健康监测与智能维护重点实验室自主基金专项资金(NJ2024022) （NJ2024022）
中国博士后科学基金(2022M711615) （2022M711615）
南京航空航天大学研究生科研与实践创新计划项目(xcxjh20240722) National Science and Technology Major Project of China(J2022-Ⅳ-0005-0022) （xcxjh20240722）
National Natural Science Foundation of China(52372387) （52372387）
Open Funds for Key Laboratory of Civil Aircraft Health Monitoring and Intelligent Maintenance(NJ2024022) （NJ2024022）
China Postdoctoral Science Foundation(2022M711615) （2022M711615）
Postgraduate Research&Practice Innovation Program of NUAA(xcxjh20240722) （xcxjh20240722）
