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Proceedings Paper

Frequency response analysis of multi-degree-of-freedom system with harmonically varying damping
Author(s): Satoshi Hirohata; Daisuke Iba
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Paper Abstract

This paper analyzes effects of harmonically varying damping on a multi-degree-of freedom system. Our recent research applied the method of the harmonically varying damping to vibration mitigation of a single-degree-of-freedom structure with sinusoidal base excitation having two frequencies. In the study, an ideal variable damper is used in conjunction with the secondary sinusoidal base excitation to reduce response due to the primary base excitation. If the primary sinusoidal base excitation contains the natural frequency of the system, resonance is induced. However, another resonance can be generated by the modulated component caused by the variable damping device and the secondary base excitation. The additional resonance is adjusted to be out of phase with the primary response, resulting in effective control of the structure. However, no such study considering the multi-degree-of-freedom system has been conducted. This paper presents the effect of the harmonically varying damping on the multi-degree-of-freedom system, especially; the influence on two structures in parallel with a variable damper between there is discussed.

Paper Details

Date Published: 6 April 2012
PDF: 15 pages
Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 83453R (6 April 2012); doi: 10.1117/12.915041
Show Author Affiliations
Satoshi Hirohata, Kyoto Institute of Technology (Japan)
Daisuke Iba, Kyoto Institute of Technology (Japan)


Published in SPIE Proceedings Vol. 8345:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012
Masayoshi Tomizuka; Chung-Bang Yun; Jerome P. Lynch, Editor(s)

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