抄録
In order to clarify the buffer action of fluid films on the impulse and vibration, the equations considered the viscosity and compressibility of the fluid and the elastic deformation of the sold bodies are derived, and solved numerically. The thickness of the fluid film, the mass and velocity of the impacting body (a cylinder), and the deflection of the impacted bodies (a semi-infinite elastic body and a cantilever) are used as parameters and the calculating results are physically discussed. In this paper, the effects of the buffer action are evaluated mainly by the coefficient of restitution. For case where the impacting velocity is relatively small and the film thickness is comparatively large, the coefficient of restriction becomes small. Considering the deflection of the cantilever, the effects of the buffer action of films become to be clear with thin films.
