Dynamic stiffness characteristics of aero-engine elastic support structure and its effects on rotor systems:mechanism and numerical and experimental studies

作     者：Lei LI Zhong LUO Kaining LIU Jilai ZHOU Lei LI;Zhong LUO;Kaining LIU;Jilai ZHOU

作者机构：School of Mechanical Engineering and AutomationNortheastern UniversityShenyang 110819China Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of ChinaNortheastern UniversityShenyang 110819China Foshan Graduate School of InnovationNortheastern UniversityFoshan 528312Guangdong ProvinceChina 

出 版 物：《Applied Mathematics and Mechanics(English Edition)》 (应用数学和力学（英文版）)

年 卷 期：2023年第44卷第2期

页      面：221-236页

核心收录：

学科分类：082502[工学-航空宇航推进理论与工程] 08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：the National Natural Science Foundation of China(Nos.11872148 and U1908217) the Fundamental Research Funds for the Central Universities of China(Nos.N2224001-4 and N2003013) the Basic and Applied Basic Research Foundation of Guangdong Province of China(No.2020B1515120015) 

主　　题：dynamic stiffness squirrel cage rotor system dynamic characteristic critical speed 

摘      要：The support structure of a rotor system is subject to vibration excitation,which results in the stiffness of the support structure varying with the excitation frequency(i.e.,the dynamic stiffness).However,the dynamic stiffness and its effect mechanism have been rarely incorporated in open studies of the rotor ***,this study theoretically reveals the effect mechanism of dynamic stiffness on the rotor ***,the numerical study and experimental verification are conducted on the dynamic stiffness characteristics of a squirrel cage,which is a common support structure for ***,the static stiffness experiment is also performed for ***,a rotor system model considering the dynamic stiffness of the support structure is *** presented rotor model is used to validate the results of the theoretical *** results illustrate that the dynamic stiffness reduces the critical speed of the rotor system and may lead to a new resonance.