Abstract
This paper presented a coupled field analysis method to integrate the air bearing model with the structural finite element (FE) model of the full hard disk drive (HDD), including the all major mechanical components, for operational shock simulations. The dynamics of head-disk interface (HDI) and mechanical components in HDDs during operational shock are then investigated by simulations. The effects of air bearing nonlinearity and the disk-ramp contact on the HDI responses to operation shocks are evaluated and understood by comparing to the linear simplified model. The results reveal that conventional de-coupled simulation methods are not valid anymore for the complicated nonlinear events, especially when the disk ramp contact or slider-disk contacts are considered. The newly developed coupled-field method is suitable for such operational shock simulations by considering the complexity of the system nonlinearity.
