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정지홈과 회전홈을 갖는 저널베어링의 안정성 평가

Title
정지홈과 회전홈을 갖는 저널베어링의 안정성 평가
Other Titles
Stability analysis of the rotating and stationary grooved journal bearings
Author
장건희
Keywords
Fluid dynamics bearing(FDB); Stability Analysis; Dynamic coefficient; Hard disk drive; Stationary Groove; Rotating Groove; Hill’s infinite determinant
Issue Date
2013-04
Publisher
한국소음진동공학회
Citation
한국소음진동공학회 학술대회논문집, Apr 2013, P.141-146
Abstract
This research investigates the stability analysis for the rotating and the stationary grooved journal bearing. The dynamic coefficients of the journal bearing are calculated by using FEM and the perturbation method. When journal bearing is in whirling motion, the dynamic coefficients have time-varying components as a sine wave due to the reaction force of oil film toward the center of journal even in the steady state. The solutions for the equations of motion can be assumed as the Fourier series expansion. The equations of motion can be rewritten as the linear algebraic equations with respect to the Fourier coefficients. Then, stability of the grooved journal bearing can be calculated by Hill's infinite determinant. The periodic function of dynamic coefficients is derived using Fourier Fast Transform(FFT).The stability of journal bearing is determined as rotating speed increases and the stability of rotating grooved journal bearing is compared and discussed with the stability of stationary grooved journal bearing.
URI
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE02450159http://repository.hanyang.ac.kr/handle/20.500.11754/69875
ISSN
1598-2548
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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