고정자의 유연성을 고려한 HDD 스핀들 계의 진동해석 = Vibration Analyses of HDD Spindle Systems Considering Stator's Flexibility

다국어 초록 (Multilingual Abstract)

This paper presents vibration analyses of hard disk drive (HDD) spindle systems based on the finite element method. The systems under investigation have a cantilevered shaft rotating on hydrodynamic bearings. In particular, the influence of stator's flexibility on major modes has been taken into account by employing relatively macroscopic elements instead of extremely fine ones popular in commercial codes. In order to prove the effectiveness of such a formulated model, two types of HDD prototypes featuring different hub and stator structures are selected as examples. Compared to the first, the second type has a reinforced stator that would raise the natural frequency of the hub’s translational (or sideway) mode. Both free and forced vibration characteristics are computed, and subsequently compared with experimental data. Conclusively, the proposed distributed model method is an efficient design tool for state-of-the-art HDD spindle systems