Experimental Characterization And Performance Of Dynamic Vibration Absorber With Tunable Piecewise-Linear Stiffness

Ramlan, Roszaidi and Mustaffer, Muhammad Harith and Abdul Rahman, Mohd Nazim and Putra, Azma (2020) Experimental Characterization And Performance Of Dynamic Vibration Absorber With Tunable Piecewise-Linear Stiffness. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 42. 03-16. ISSN 1678-5878

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Abstract

Dynamic vibration absorber (DVA) is one of the ways to control the level of vibration. Among many mechanisms and control strategies of the DVA, passively tuned DVA emerges as one of the most efective absorbers due to its simple mechanism. However, the performance of the passive tuned DVA sufers from narrow suppression bandwidth. This paper introduces a nonlinear dynamic vibration absorber (NDVA) with an adjustable piecewise-linear stifness mechanism which has a characteristic almost similar to hardening stifness to broaden the vibration suppression bandwidth. The mechanism is made of a cantilever beam constrained by two vertically and horizontally adjustable limit blocks on either side of the beam’s equilibrium position. The static and dynamic properties of the proposed NDVA were frst investigated for diferent positions of the limit blocks. Then the performance of the NDVA was compared with the linear DVA in terms of the vibration suppression bandwidth, separation of resonance frequencies and the ability to cope with mistuning. Overall, the NDVA seems to outperform the linear DVA, and it is more forgiving in the case of mistuning.

Item Type: Article
Uncontrolled Keywords: Nonlinear vibration absorber, Hardening stifness, Piecewise-linear stifness, Dynamic Vibration Absorber, Tunable Piecewise-Linear Stiffness
Divisions: Faculty of Mechanical Engineering
Depositing User: Sabariah Ismail
Date Deposited: 09 Dec 2020 14:40
Last Modified: 09 Dec 2020 14:40
URI: http://eprints.utem.edu.my/id/eprint/24755
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