This paper offers an experimental robustness analysis of a semi-active tuned vibration absorber (TVA) subject to structural mass off-tuning, which occurs frequently in practical applications of TVAs. One of the critical problems of a conventional TVA is off-tuning or miss-tuning because off-tuned TVAs may amplify the vibrations of the primary structure. This study intends to evaluate how well semi-active TVAs are able to adapt to structural mass changes (mass off-tuning) as compared with passive TVAs. To this end, a test apparatus was built to represent a two-degree-of-freedom structure model coupled with a TVA. The semi-active TVA considered in this study employed a magneto-rheological (MR) damper as its damping element to enhance overall performance. Using this test apparatus, a series of tests were conducted to identify the optimal tuning parameters of the TVAs. After obtaining each TVA’s optimal tuning parameters based on equal peak transmissibility criteria, the mass off-tuning tests were then performed on the optimally tuned TVAs. In order to off-tune the system, the mass of the primary structure varied from to of its nominal mass using a set of steel plates. Overall, the experimental results show that the semi-active MR TVA outperforms the passive TVA in reducing maximum vibrations. Moreover, the results show that the semi- active TVA is more robust to changes in the primary mass (mass off-tuning) The results further show that the semi-active MR TVA offers larger performance gains as the structure mass increases.
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e-mail: koo@muohio.edu
e-mail: ahmadian@vt.edu
e-mail: setareh@vt.edu
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February 2006
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Experimental Robustness Analysis of Magneto-Rheological Tuned Vibration Absorbers Subject to Mass Off-Tuning
Jeong-Hoi Koo,
Jeong-Hoi Koo
Department of Mechanical and Manufacturing Engineering,
e-mail: koo@muohio.edu
Miami University
, Oxford, OH 45056
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Mehdi Ahmadian,
e-mail: ahmadian@vt.edu
Mehdi Ahmadian
Center for Vehicle Systems and Safety Department of Mechanical Engineering
, Virginia Tech, Blacksburg, VA 24061-0238
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Mehdi Setareh
Mehdi Setareh
College of Architecture and Urban Studies,
e-mail: setareh@vt.edu
Virginia Tech
, Blacksburg, VA 24060–0205
Search for other works by this author on:
Jeong-Hoi Koo
Department of Mechanical and Manufacturing Engineering,
Miami University
, Oxford, OH 45056e-mail: koo@muohio.edu
Mehdi Ahmadian
Center for Vehicle Systems and Safety Department of Mechanical Engineering
, Virginia Tech, Blacksburg, VA 24061-0238e-mail: ahmadian@vt.edu
Mehdi Setareh
College of Architecture and Urban Studies,
Virginia Tech
, Blacksburg, VA 24060–0205e-mail: setareh@vt.edu
J. Vib. Acoust. Feb 2006, 128(1): 126-131 (6 pages)
Published Online: May 24, 2005
Article history
Received:
April 8, 2004
Revised:
May 24, 2005
Citation
Koo, J., Ahmadian, M., and Setareh, M. (May 24, 2005). "Experimental Robustness Analysis of Magneto-Rheological Tuned Vibration Absorbers Subject to Mass Off-Tuning." ASME. J. Vib. Acoust. February 2006; 128(1): 126–131. https://doi.org/10.1115/1.2128647
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