Abstract:
This paper studies the flow structural interaction (FSI) within a hard disk drive (HDD) through the use of a novel coupling
method. The interaction studied was the fluid induced vibration in the HDD. A two step coupling approach was
used, where the fluid and structural components were solved sequentially. The result obtained was a ratio of 0.65 between
the vibration amplitudes of a fixed head stack assembly (HSA) and a moving HSA. The ratio was next applied on
a real 3.5 inch HDD, to allow the parameter to be further improved upon. A new benchmark index of 0.69 was developed
from this. This parameter may allow future researchers to model the out of plane vibrations of a HSA easily, saving
precious time. A 31% more accurate simulation of FSI within 3.5 inch HDD at 15000 rpm is achieved by the use of
this new coupling method and benchmark index
