G100052 Vibrational Damping Measurement by Free Vibration of Elastic Body

Abstract

For a measurement of very small damping, we propose a method of identifying damping by free vibration. The free vibration response is measured by using sound with the vibration. Two methods, method of using the adaptive notch filter and method by curve fit through synthesizing multiple sine wave, are tried. As a result, valid values of damping factor can be obtained from the method of using adaptive notch filter.