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Proceedings Paper

Dynamics analysis of constrained layer damping treated covers for hard disk drives
Author(s): Yanning Liu; Yanchu Xu
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Paper Abstract

A finite element model is developed to study the dynamics properties, vibration, shock and acoustics performance of constrained layer damping treated covers for hard disk drives (HDD). The ever-increasing storage density of HDD requires smaller vibration level of HDD components, especially the storage disks inside. In the mean time, tighter vibration, shock and acoustics specifications are required by customers. In practice, it is found that the vibration of the storage disks and the shock/vibration and acoustics performance of HDD are closely related to the properties of the HDD covers. The existence of viscoelastic materials (VEM) inside the HDD covers makes them hard to analyze and the complex modulus provided by VEM manufactures can only be utilized in frequency domain. In this paper, the VEM properties are fitted with GHM (Golla, Hughes and McTavish) parameters so that a complex eigenvalue analysis can be performed to extract modal frequencies and damping of the cover. Parametric study is conducted to understand how some essential design parameters affect the dynamics properties of the cover. Vibration/shock and acoustics responses of the cover are also simulated to provide insights for HDD cover design.

Paper Details

Date Published: 27 June 2002
PDF: 12 pages
Proc. SPIE 4697, Smart Structures and Materials 2002: Damping and Isolation, (27 June 2002); doi: 10.1117/12.472680
Show Author Affiliations
Yanning Liu, Maxtor Corp. (United States)
Yanchu Xu, Maxtor Corp. (United States)

Published in SPIE Proceedings Vol. 4697:
Smart Structures and Materials 2002: Damping and Isolation
Gregory S. Agnes, Editor(s)

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