정지홈과 회전홈을 갖는 저널베어링의 안정성 평가Stability analysis of the rotating and stationary grooved journal bearings
- Other Titles
- Stability analysis of the rotating and stationary grooved journal bearings
- Authors
- 이민호; 이지훈; 장건희
- Issue Date
- Apr-2013
- Publisher
- 한국소음진동공학회
- Keywords
- Fluid dynamics bearing(FDB); Stability Analysis; Dynamic coefficient; Hard disk drive; tationary Groove; Rotating Groove; Hill' s infinite determinant
- Citation
- 한국소음진동공학회 2013년 춘계학술대회 논문집, pp.141 - 146
- Indexed
- OTHER
- Journal Title
- 한국소음진동공학회 2013년 춘계학술대회 논문집
- Start Page
- 141
- End Page
- 146
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/162963
- ISSN
- 1598-2548
- 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.
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