Abstract
To examine experimentally the approximation of collision damping in the former report, here a two-mass one-stiffness system is approximately analysed as to its maximum amplitude state, experimentally checked, and as a result the author verifies that the theory gives practically sufficient accuracy of the order of 1st approximation. Then the estimation of collision velocity may be given practically as well as frequency and amplitude at the maximum amplitude state. if the data of the system dimensions and velocity-proportional damping coefficient are given. The estimated collision velocity may be an useful key of the problem about the failure of clearance parts. The experimental system is made up of an electrical dynamometer, an intermediate shaft, a variable clearance joint, and a fan, excited by a piston-crank mechanism. The author reads the torque and rpm at the maximum amplitude state, besides detecting electrically from the revolving system its fluctuating torque, collision velocity and touching of clearance parts.
