Dynamic modeling and simulation of blade-casing system with rubbing considering time-varying stiffness and mass of casing  

作　　者：Hui MA Hong GUAN Lin QU Xumin GUO Qinqin MU Yao ZENG Yanyan CHEN 

机构地区：[1]School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China [2]Key Laboratory of Vibration and Control of Aero-Propulsion Systems,Ministry of Education of China,Northeastern University,Shenyang 110819,China [3]Sunny Optical Technology(Group)Co.Ltd.,Ningbo 315400,Zhejiang Province,China [4]Aircraft Strength Institute of China,Xi’an 710065,China [5]AECC Sichuan Gas Turbine Research Institute,Chengdu 610500,China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2025年第5期849-868,共20页应用数学和力学(英文版)

基　　金：Project supported by the National Science and Technology Major Project(No.J2022-IV-0005-0022);the Aero Science Foundation of China(No.20230015050001);the Shenyang Science and Technology Plan Project of China(No.24-202-6-01)。

摘　　要：As a common fault of the aero-engine,the blade-casing rubbing(BCR)has the potential to cause catastrophic accidents.In this paper,to investigate the dynamic responses and wear characteristics of the system,the laminated shell element is used to establish the finite element model(FEM)of a flexibly coated casing system.Using the shell element,the blade is modeled,and the surface stress of the blade is calculated.The stress-solving method of the blade is validated through comparisons with the measured time-domain waveform of the stress.Then,a dynamic model of a blade-flexibly coated casing system with rubbing is proposed,accounting for the time-varying mass and stiffness of the casing caused by coating wear.The effects of the proposed flexible casing model are compared with those of a rigid casing model,and the stress changes induced by rubbing are investigated.The results show that the natural characteristics of the coated casing decrease due to the coating wear.The flexibly coated casing model is found to be more suitable for studying casing vibration.Additionally,the stress changes caused by rubbing are slight,and the change in the stress maximum is approximately 5%under the influence of the abrasive coating.

关 键 词：dynamic modeling flexibly coated casing RUBBING coating wear nonlinear vibration 

分 类 号：O322[理学—一般力学与力学基础] O342[理学—力学]