✦ LIBER ✦

PREDICTION OF AEROELASTIC FLUTTER IN A HARD DISK DRIVE

✍ Scribed by B.C. KIM; A. RAMAN; C.D. MOTE JR.

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 298 KB
Volume: 238
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.2000.3209

No coin nor oath required. For personal study only.

✦ Synopsis

An experimental technique to predict the onset of aeroelastic #utter of an enclosed computer memory disk is presented. The aerodynamic pressure is modelled as the sum of dissipative and circulatory linear operators, which subsumes as a special case the pressure generated in a thin hydrodynamic "lm between the disk and the wall. It is shown that the aeroelastic model parameters can be extracted from the frequency response function of the disk spinning at subcritical speeds. The aeroelastic parameters for an acoustically excited single disk at di!erent enclosure gaps are derived for the speed range 6,000}19,800 rpm. The #utter speed predicted is strongly in#uenced by the enclosure gap and the substrate damping. A #utter speed as low as 35,000 rpm has been predicted. The technique can also be extended to predict the #utter speed in other systems including DVD and CDROM drives.

2000 Academic Press

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