Experimental determination of damping property of structure

The needs for reliable and accurate damping properties are necessary in order to produce a good simulation and improve a major source of uncertainty at the design stage. Thus, an experimental investigation was conducted to find damping property of structure. In this study, three different plates wer...

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Main Author:	Kanamuthy, Dharma Raj
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/78556/1/DharmaRajKanamuthyMFKM2017.pdf
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id	my-utm-ep.78556
record_format	uketd_dc
spelling	my-utm-ep.785562018-08-27T03:22:30Z Experimental determination of damping property of structure 2017-01 Kanamuthy, Dharma Raj TJ Mechanical engineering and machinery The needs for reliable and accurate damping properties are necessary in order to produce a good simulation and improve a major source of uncertainty at the design stage. Thus, an experimental investigation was conducted to find damping property of structure. In this study, three different plates were used to determine their damping properties. Experimental modal analysis using impact hammer and accelerometer was performed to acquire the frequency response function (FRF) of test samples. Damping properties were extracted from FRF using polyreference least-squares complex frequency-domain method (PolyMAX) and polyreference least-squares complex exponential time-domain method (LSCE). The results reveal that for lightly damped structure, the damping ratio from LSCE and PolyMAX are comparable. However, for heavily damped structure, the damping ratio from LSCE is slightly higher than damping ratio from PolyMAX. The results also show that PolyMAX is better than LSCE in term of stabilisation diagram. Finally some improvements on the experimental method have been proposed in order to achieve accurate damping property. 2017-01 Thesis http://eprints.utm.my/id/eprint/78556/ http://eprints.utm.my/id/eprint/78556/1/DharmaRajKanamuthyMFKM2017.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:110300 masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Kanamuthy, Dharma Raj Experimental determination of damping property of structure
description	The needs for reliable and accurate damping properties are necessary in order to produce a good simulation and improve a major source of uncertainty at the design stage. Thus, an experimental investigation was conducted to find damping property of structure. In this study, three different plates were used to determine their damping properties. Experimental modal analysis using impact hammer and accelerometer was performed to acquire the frequency response function (FRF) of test samples. Damping properties were extracted from FRF using polyreference least-squares complex frequency-domain method (PolyMAX) and polyreference least-squares complex exponential time-domain method (LSCE). The results reveal that for lightly damped structure, the damping ratio from LSCE and PolyMAX are comparable. However, for heavily damped structure, the damping ratio from LSCE is slightly higher than damping ratio from PolyMAX. The results also show that PolyMAX is better than LSCE in term of stabilisation diagram. Finally some improvements on the experimental method have been proposed in order to achieve accurate damping property.
format	Thesis
qualification_level	Master's degree
author	Kanamuthy, Dharma Raj
author_facet	Kanamuthy, Dharma Raj
author_sort	Kanamuthy, Dharma Raj
title	Experimental determination of damping property of structure
title_short	Experimental determination of damping property of structure
title_full	Experimental determination of damping property of structure
title_fullStr	Experimental determination of damping property of structure
title_full_unstemmed	Experimental determination of damping property of structure
title_sort	experimental determination of damping property of structure
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2017
url	http://eprints.utm.my/id/eprint/78556/1/DharmaRajKanamuthyMFKM2017.pdf
_version_	1747818014277894144

Experimental determination of damping property of structure

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