Study on Impact Damper Having a Spring-supported Additional Mass

Abstract

While a number of studies on impact dampers having a free additional mass have been published, impact dampers having a spring-supported additional mass have been dealt with by only a few investigators. In this study, we devised a model of an impact damper having a spring-supported additional mass and made theoretical and experimental analyses of it, thus obtaining data useful for practical planning application. The obtained results are as follows : (1) Generally, an impact damper of one-sided impact design is superior in damping effect to one of two-sided impact design. (2) If the static distance between the impact damper and the stopper is chosen properly and the ratio of the natural frequency of the impact damper to that of the damped mass is set at a value of 0.6 - 0.8, a damping effect is achieved over a wide range of excitation frequencies. (3) The calculated and experimental results are in fairly close agreement with each other.