IMPACT DAMPER WITH GRANULAR MATERIALS (4TH REPORT, FREQUENCY RESPONSE IN A HORIZONTAL SYSTEM).

Abstract

A new type of impact damper consists of a bed of granular materials moving in a container fixed to a primary vibrating system. The problem is to determine the characteristics of the impact damper with granular materials for reducing the vibration of a single-degree-of-freedom system when the driving force is a simple harmonic. This report deals with the case when the damper is applied to a horizontal vibrating system. Experimental models were tested in the laboratory and theoretical analyses were developed to find the periodic solutions for the impact oscillations of a mass in the container, assuming the coefficient of restitution R equals O. The corrective mass ratios and clearances were found to fit the theoretical responses to those experimentally obtained.