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...

Full description

Saved in:
Bibliographic Details
Main Author: Kanamuthy, Dharma Raj
Format: Thesis
Language:English
Published: 2017
Subjects:
Online Access:http://eprints.utm.my/id/eprint/78556/1/DharmaRajKanamuthyMFKM2017.pdf
Tags: Add Tag
No Tags, Be the first to tag this record!
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