Performance of Particle Dampers Under Random Excitation

[+] Author and Article Information
A. Papalou, S. F. Masri

Department of Civil Engineering, University of Southern California, Los Angeles, CA 90089-2531

J. Vib. Acoust 118(4), 614-621 (Oct 01, 1996) (8 pages) doi:10.1115/1.2888343 History: Received July 01, 1995; Online February 26, 2008


An experimental and analytical study is made of the performance of particle dampers under wide-band random excitation. A small model, provided with a nonlinear auxiliary mass damper, was used to investigate the major system parameters that influence the performance of particle dampers: total auxiliary mass ratio, particle size, container dimension, and the intensity and direction of the excitation. It is shown that properly designed particle dampers, even with a relatively small mass ratio, can considerably reduce the response of lightly damped structures. An approximate analytical solution, which is based on the concept of an equivalent single unit-impact damper, is presented. It is shown that the approximate solution can provide an adequate estimate of the root-mean-square response of the randomly excited primary system when provided with a particle damper that is operating in the vicinity of its optimum range of parameters.

Copyright © 1996 by The American Society of Mechanical Engineers
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