R&D: Simulation of HGA Vibration Characteristics Inside Helium-Filled HDD

IEEE Transactions on Magnetics has published an article written by G. Zhang, School of Power and Mechanical Engineering, Wuhan University, Wuhan, China, H. Li, S. Shen, and S. Wu.

Abstract: “The reliability and stability of HDDs are especially important as the areal recording density is rapidly increasing and target to 10 Tb/in² in the future. The vibrations of the head gimbals assembly (HGA) are inevitable by internal fluid flow and external shock impulses. In this paper, a 3-D finite-element model of an HDD is developed. The internal flow-induced HGA vibrations are investigated by a fluid-structure interaction approach. The external shock-induced vibrations of HGA are also analyzed. The investigated filling gases in the HDD include air and helium.“