抄録
In this paper, we propose the contact stiffness model of the bolted joint layer of a spindle rotor and the identifing procedure of the contact stiffness of the normal and the tangential directions. The test rotor is composed of a journal part and two thrust plates bound with bolts. The each surface of clamped with bolts is processed by two methods in order to change the roughness and roundness of surface. In all conditions of roughness and roundness of surface, contact stiffness increase as the clamping torque of each bolt increases. On the other hands, in all condition of clamping torque, contact stiffness increase as the roughness and roundness of surface decreases.
