Iterative dynamic condensation method of finite element model for rotor-bearing system

Sun, Xun1,2; Cui, Jiwen1,2; Chen, Yue1,2; Feng, KunPeng3; Dang, Hong4

10.1117/12.2611481

2021

10th International Symposium on Precision Mechanical Measurements

0277-786X

1996-756X

TENTH INTERNATIONAL SYMPOSIUM ON PRECISION MECHANICAL MEASUREMENTS

12059

OCT 15-17, 2021

null,Qingdao,PEOPLES R CHINA

1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA

SPIE-INT SOC OPTICAL ENGINEERING

For structures with damping and gyroscopic effects, an iterative dynamic condensation method of finite element model is proposed in this paper, which is able to simultaneously reduce the mass, damping, gyroscopic and stiffness matrices of the rotor-bearing system. The numerical example of a simple rotor-bearing system is used to verify the present method. The critical speed and steady-state displacement response of the rotor-bearing system are calculated and compared using the proposed reduced model and full model, and the results show that the reduced model can accurately calculate the critical speed. When the speed is lower than the second-order critical speed, the reducd model proposed in this paper can accurately predict the steady-state response of the rotor system(except for the critical speed), and it can be used for the unbalance fault diagnosis of the rotor-bearing system.

Condensation method rotor-bearing system

其他

英语

CPCI-S ; EI

Engineering ; Instruments & Instrumentation ; Optics

Engineering, Mechanical ; Instruments & Instrumentation ; Optics

WOS:000763803600013

20220211446210

Condensation ; Damping ; Iterative methods ; Numerical methods ; Speed ; Stiffness matrix

Chemical Operations:802.3 ; Algebra:921.1 ; Numerical Methods:921.6 ; Mechanics:931.1

Web of Science

1.Harbin Inst Technol, Ctr Ultraprecis Optoelect Instrument, Harbin 150080, Peoples R China
2.Harbin Inst Technol, Minist Ind & Informat Technol, Key Lab Ultraprecis Intelligent Instrumentat, Harbin 150080, Peoples R China
3.Nanjing Univ Aeronaut & Astronaut, Coll Automat Engn, Nanjing 210000, Peoples R China
4.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518000, Peoples R China

Sun, Xun,Cui, Jiwen,Chen, Yue,et al. Iterative dynamic condensation method of finite element model for rotor-bearing system[C]. 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA:SPIE-INT SOC OPTICAL ENGINEERING,2021.