Study on Mechanical Interface between Head and Media in Flexible Disk Drive : 1st Report, Static Characteristics

Abstract

This paper presents an analytical method for mechanical interface between head and media in flexible disk drive. Static Green function in disk deflection is first derived by using Fourier series approximation in circumferential direction and finite element method in radial direction. Deflection distribution of a stationary disk including the base plate and the penetrating spherical head is next obtained by developing a novel numerical method named the virtual variable stiffness spring (VVSS) iteration method for solving the three dimensional contact problem. It is found from experiments that the analytical results of contact force, deflection distribution around the spherical head and contact position are in good agreement with experimental ones when disk deflection is as small as the disk thickness.