Numerical Investigation of Flow Structure Interaction Coupling Effects in Hard Disk Drives

Eddie Yin-Kwee Ng, Qing Ren Teo, Ning Yu Liu

Data Storage Institute, Agency for Science, Technology and Research, Singapore.
School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore.

DOI: 10.4236/wjm.2012.21002                

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.

Keywords

Hard Disk Drives; Coupling Method; Modeling; Simulation and Optimization; FSI

Conflicts of Interest

The authors declare no conflicts of interest.

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