Design Modifications to Improve the Antishock Performance of a Stamped Base for a 2.5-in HDD

Author

Geonyup Lim ; Seokhwan Kim ; No-Cheol Park ; Kyoung-Su Park ; Hyun-Chul Lee ; Ju-Ho Kim

Author_Institution

Dept. of Mech. Eng., Yonsei Univ., Seoul, South Korea

Volume

50

Issue

7

fYear

2014

fDate

Jul-14

Firstpage

1

Lastpage

4

Abstract

This paper presents a modified design for a stamped base for a 2.5-in hard disk drive (HDD). A stamped base is a thinner thickness and lower stiffness than a die-casting base. To improve shock performance of the stamped base, the finite element (FE) model of the HDD is constructed. Then, the FE model was verified by modal analysis. Drop test was performed to confirm the shock simulation model. Parametric analysis was used to identify the key parameters for the shock performance which were the base thickness, rib shape, number of ribs, and reinforcement. The correlation between the relative displacement and natural frequency of the HDD was investigated for each parameter. The dominant parameter was identified and applied to the FE model of the stamped base. The modified stamped-base model was then evaluated under nonoperational shock conditions.

Keywords

die casting; disc drives; finite element analysis; hard discs; mechanical testing; modal analysis; FE model; HDD; antishock performance; base thickness; design modifications; die-casting base; dominant parameter; drop test; finite element model; hard disk drive; modal analysis; modified stamped-base model; natural frequency; nonoperational shock conditions; parametric analysis; relative displacement; rib shape; shock simulation model; size 2 in; Analytical models; Correlation; Electric shock; Iron; Manufacturing processes; Ribs; Shape; Die-casting base; drop test; large mass method; nonoperational (NOP) shock; shock analysis; stamped base;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2298410

Filename

6851257