Abstract
The transient response of head/disk interface in a non-operating hard disk drive is investigated theoretically and by FE simulation, subjected to half-sine shock pulse in the axial directions. The equations of motion are driven by Hamilton principle. To get the solution, the assumed mode approximation is used and then the Galerkin method is applied. Numerical results are obtained using the Runge-Kutta method for a 3.5 hard disk/head system. The results are good agreement with FE simulation. It is found that the head slap is caused not by disk shock response, but by suspension dynamic behavior dominantly. Design parameter study of suspension is performed to find out the optimal value increasing the shock resistance of a disk drive.
