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Shock and Vibration
Volume 2015 (2015), Article ID 154892, 9 pages
Research Article

Design and Experimental Implementation of a Beam-Type Twin Dynamic Vibration Absorber for a Cantilevered Flexible Structure Carrying an Unbalanced Rotor: Numerical and Experimental Observations

1Department of Mechanical and Industrial Engineering, College of Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoud, 123 Muscat, Oman
2Department of Control Engineering, Kisarazu National College of Technology, 2 Chome-11-1 Kiyomidaihigashi, Kisarazu, Chiba 292-0041, Japan
3Department of Computer and Electrical Engineering, College of Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoud, 123 Muscat, Oman

Received 8 April 2015; Accepted 30 July 2015

Academic Editor: Sergio De Rosa

Copyright © 2015 Abdullah Özer 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.


This paper presents experimental and numerical results about the effectiveness of a beam-type twin dynamic vibration absorber for a cantilevered flexible structure carrying an unbalanced rotor. An experimental laboratory prototype setup has been built and implemented in our laboratory and numerical investigations have been performed through finite element analysis. The proposed system design consists of a primary cantilevered flexible structure with an attached dual-mass cantilevered secondary dynamic vibration absorber arrangement. In addition, an unbalanced rotor system is attached to the tip of the flexible cantilevered structure to inspect the system response under harmonic excitations. Numerical findings and experimental observations have revealed that significant vibration reductions are possible with the proposed dual-mass, cantilevered dynamic vibration absorber on a flexible cantilevered platform carrying an unbalanced rotor system at its tip. The proposed system is efficient and it can be practically tuned for variety of design and operating conditions. The designed setup and the results in this paper can serve for practicing engineers, researchers and can be used for educational purposes.