This monograph is based on the Doctoral thesis of the author at the
University of California, Berkeley (2008). Over the past few years,
hard disk drives (HDD) have become viable for many consumer
products that require large storage capacities. These applications
subject the HDD to adverse conditions wherein the reliability and
performance of the drive becomes critical. This book presents a
Finite Element based simulation methodology which is used to study
dynamic events such as load/unload and shock of the HDD. The
dynamics of the HDI are governed by the structural components of
the HDD as well as the air-bearing which is formed between the
spinning disk and the flying head. A new numerical scheme is
presented to solve the resulting nonlinear coupled set of equations
using stabilized finite elements, first for the steady state case
and then for the time dependent case. Meshing/refinement strategies
are explored in order to obtain accurate results with as few
degrees of freedom as possible. Finally the methodology is applied
to simulate the shock and load/unload processes in HDDs and carry
out parametric studies on the performance of a 1" HDD.
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