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http://dx.doi.org/10.5050/KSNVN.2002.12.6.445

Dissipation Effects Induced by Substructures Comprised of Multiple oscillators  

Choi, Sung-Hoon (한국과학기술원 기계공학과)
Kim, Yang-Hann (한국과학기술원 기계공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.12, no.6, 2002 , pp. 445-452 More about this Journal
Abstract
The goal of this paper Is to characterize the vibration damping induced in a main structure by a large number of sub-oscillators. A simple expression is obtained for the substructure impedance when the number of sub-oscillators approaches Infinity. It is found that the induced damping depends on the total mass of the sub-oscillators resonating in a frequency band of interests and nearly independent of their Individual loss factors. A modal overlapping condition. which corresponds to bandwidths that exceed the spacing of those natural frequencies, is required for the sub-oscillators to have such effects. An impulse response of the system is also considered. When the sub-oscillators lack damping and do not satisfy the modal overlapping condition, the vibratory energy is returned from the sub-oscillators to the main structure at later times. The result of this paper is consistent with that found with the fuzzy structure and SEA framework.
Keywords
Dissipation; Substructure; Fuzzy Structure; Tuned Mass Damper;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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