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Advances in Acoustics and Vibration
Volume 2008, Article ID 140894, 6 pages
http://dx.doi.org/10.1155/2008/140894
Research Article

Performance of a New Fine Particle Impact Damper

1College of Medical Instrumentation and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2College of Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Received 7 April 2008; Revised 15 July 2008; Accepted 28 July 2008

Academic Editor: Mohammad Tawfik

Copyright © 2008 Yanchen Du et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The energy dissipation mechanisms of conventional impact damper (CID) are mainly momentum exchange and friction. During the impact process, a lot of vibration energy cannot be exhausted but reverberated among the vibration partners. Besides, the CID may produce the additional vibration to the system or even amplify the response in the low-frequency vibration. To overcome these shortcomings, this paper proposes a new fine particle impact damper (FPID) which for the first time introduces the fine particle plastic deformation as an irreversible energy sink. Then, the experiments of the cantilevered beam with the CID and that with the FPID are, respectively, carried out to investigate the behavior of FPID. The experimental results indicate that the FPID has a better performance in vibration damping than in the CID and the FPID works well in control of the vibration with frequency lower than 50 Hz, which is absent to the non-obstructive particle damper. Thus, the FPID has a bright and significant application future because most of the mechanical vibration falls in the range of low freqency.