Abstract
A method has been developed to identify spring stiffness and damping coefficient at a joint interface (by interactive use of theoretical simulation and experiment) which could be generally applied to practical slideways and bolted joints. This paper describes the procedure of this method and shows the results. This identification method uses the experimental models not containing the influences of elements other than the joint under study and the computer simulation identifying the equivalent values of the joint interface itself. The identified equivalent spring stiffness and damping coefficient per unit area of joint interface show the significant change for the magnitude of the mean contact pressure. The effects of the magnitude of the mean contact pressure on the equivalent values are completely different in the shear and normal direction of the interface respectively. The significant values were derived with respect to the kind of oil on the contact surfaces of the joint. It has been confirmed that the values of the equivalent spring stiffness and damping coefficient which depend on the magnitude of the mean contact pressure can be applied to general joints which have the same property of contact surface but differing in shape and contact area.
