Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/77857
PIRA download icon_1.1View/Download Full Text
Title: Design optimization of a viscoelastic dynamic vibration absorber using a modified fixed-points theory
Authors: Wong, WO 
Fan, RP 
Cheng, F 
Issue Date: Feb-2018
Source: Journal of the Acoustical Society of America, Feb. 2018, v. 143, no. 2, p. 1064-1075
Abstract: A viscoelastic dynamic vibration absorber (VDVA) is proposed for suppressing infrasonic vibrations of heavy structures because the traditional dynamic vibration absorber equipped with a viscous damper is not effective in suppressing low frequency vibrations. The proposed VDVA has an elastic spring and a viscoelastic damper with frequency dependent modulus and damping properties. The standard fixed-points theory cannot be applied to derive the optimum design parameters of the VDVA because both its stiffness and damping are frequency dependent. A modified fixed-points theory is therefore proposed to solve this problem. H∞ design optimization of the proposed VDVA have been derived for the minimization of resonant vibration amplitude of a single degree-of-freedom system excited by harmonic forces or due to ground motions. The stiffness and damping of the proposed VDVA can be decoupled such that both of these two properties of the absorber can be tuned independently to their optimal values by following a specified procedure. The proposed VDVA with optimized design is tested numerically using two real commercial viscoelastic damping materials. It is found that the proposed viscoelastic absorber can provide much stronger vibration reduction effect than the conventional VDVA without the elastic spring.
Publisher: Acoustical Society of America
Journal: Journal of the Acoustical Society of America 
ISSN: 0001-4966
EISSN: 1520-8524
DOI: 10.1121/1.5024506
Rights: Copyright 2018 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.
The following article appeared in W. O. Wong, R. P. Fan, and F. Cheng, J. Acoust. Soc. Am. 143, 1064 (2018) and may be found at https://doi.org/10.1121/1.5024506.
Appears in Collections:Journal/Magazine Article

Files in This Item:
File Description SizeFormat 
2000_1.5024506.pdf992.23 kBAdobe PDFView/Open
Open Access Information
Status open access
File Version Version of Record
Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page views

101
Last Week
1
Last month
Citations as of Mar 24, 2024

Downloads

77
Citations as of Mar 24, 2024

SCOPUSTM   
Citations

13
Last Week
0
Last month
Citations as of Mar 28, 2024

WEB OF SCIENCETM
Citations

11
Last Week
0
Last month
Citations as of Mar 28, 2024

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.