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Review Articles

Recent Studies of Adaptive Tuned Vibration Absorbers/Neutralizers

[+] Author and Article Information
Lari Kela1

Department of Mechanical Engineering, University of Oulu, P.O. Box 4200, FI-90014 Oulu, Finlandlari.kela@oulu.fi

Pekka Vähäoja

Department of Mechanical Engineering, University of Oulu, P.O. Box 4200, FI-90014 Oulu, Finland

1

Corresponding author.

Appl. Mech. Rev 62(6), 060801 (Aug 05, 2009) (9 pages) doi:10.1115/1.3183639 History: Received June 19, 2008; Revised June 08, 2009; Published August 05, 2009

This article gathers together the most recent articles of adjustable tuned vibration absorbers. The tuned vibration absorber was invented over 100 years ago, and its adjustability is also already well-known. However, concentration of this review was only on articles published since the year 2000 in peer reviewed journals, except from certain elementary books and some previous review articles in order to keep up with the current events in this broad field. First a brief inspection of the theory of tuned vibration absorbers (TVAs) is presented. After that mechanical TVAs are presented more carefully. In the same chapter the following are also handled: virtual absorbers, absorbers with adjustable damping, and Helmholtz resonators. Own chapter is allocated for multiple TVAs whose idea is to replace adjustability by adding several TVAs to primary system to damp out vibrations in the wide frequency band. The review section is completed by presenting smart material TVAs, which include, e.g., piezoelectric materials, shape-memory alloys, electrorheological and magnetorheological materials of fluids. An adjustable Helmholtz resonator in a low pressure hydraulic system is presented in Sec. 5. Experiments verify the efficiency of the damping character of the adjustable Helmholtz resonator whose resonant frequency can be varied.

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Copyright © 2009 by American Society of Mechanical Engineers
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References

Figures

Grahic Jump Location
Figure 1

Primary system (m) with damped tuned vibration absorber (ma), reproduced from Ref. 9

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Figure 2

Mechano-acoustic analogy of a Helmholtz resonator

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Figure 3

An adjustable Helmholtz resonator for hydraulic system. Components are 1. cavity, 2. neck, 3. piston, 4. piston rod, and 5. frame. Dimensions are in millimeters.

Grahic Jump Location
Figure 4

Measured amplitudes and p-p-values of pressure pulsations at the frequency of 35.2 Hz without resonator (left) and with resonator (right)

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