Staff View: The Study Of EMA Effect On Modal Identification: A Review

The Study Of EMA Effect On Modal Identification: A Review

Modal Analysis is a common practice to define parameters of structure under scientific view. The properties that come along need to be enlightened so that every circumstance appeared can be tackled in proper manner. Experimental Modal Analysis (EMA) is a well-known procedure for determining modal pa...

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Main Authors:	Ramli, Mohd Irman, Nuawi, Mohd. Zaki, Abdullah, Shahrum, Mohammad Rasani, Mohammad Rasidi, Salleh, Mohd Shukor, Md Basar, Mohd Farriz
Format:	Article
Language:	English
Published:	UTeM 2017
Subjects:	T Technology (General) TJ Mechanical engineering and machinery
Online Access:	http://eprints.utem.edu.my/id/eprint/20799/2/JMET%20Jun%202017%20Google%20Scholar.pdf http://eprints.utem.edu.my/id/eprint/20799/ http://journal.utem.edu.my/index.php/jmet/article/view/1517
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spelling	my.utem.eprints.207992021-07-07T20:50:28Z http://eprints.utem.edu.my/id/eprint/20799/ The Study Of EMA Effect On Modal Identification: A Review Ramli, Mohd Irman Nuawi, Mohd. Zaki Abdullah, Shahrum Mohammad Rasani, Mohammad Rasidi Salleh, Mohd Shukor Md Basar, Mohd Farriz T Technology (General) TJ Mechanical engineering and machinery Modal Analysis is a common practice to define parameters of structure under scientific view. The properties that come along need to be enlightened so that every circumstance appeared can be tackled in proper manner. Experimental Modal Analysis (EMA) is a well-known procedure for determining modal parameters. The EMA is regarded as an ‘indoor tools’ to examine modal parameters. Meanwhile, Operational Modal Analysis (OMA) on the other hand acts as an ‘outdoor tools’, or operated at site. OMA tests in most engineering applications are not comparable to typical EMA tests. During a typical OMA test, the structure has different boundary conditions than the typical free-free conditions of an EMA test. Therefore, it can be expected that OMA results in many (or even most) engineering applications will show higher damping values than a free-free EMA test. Here, the EMA analysis method will be discussed. Modal parameters consist of mode shape, natural frequency and damping ratio. The study focused on performing mass change strategy via mass normalization of the displacement and strain mode shape occurred in strain EMA. By applying EMA, the mass-normalized displacement and strain mode shapes of the structures can be obtained, through matching the shapes which were calculated by FEM. The results were verified via classic EMA measurement method. One of the benefit of applying mass change strategy is other than obtaining the modal parameter, the strain mode shape parameter also possible to be determined. From the analysis, one can understand that the EMA has its own significant role in detecting modal appeared by mean of vibration. Thus, EMA proven to be a useful method to gain relevant data relating with mechanical properties characteristics other than strain such like stress, impact, tensile, elongation etc. UTeM 2017-06 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/20799/2/JMET%20Jun%202017%20Google%20Scholar.pdf Ramli, Mohd Irman and Nuawi, Mohd. Zaki and Abdullah, Shahrum and Mohammad Rasani, Mohammad Rasidi and Salleh, Mohd Shukor and Md Basar, Mohd Farriz (2017) The Study Of EMA Effect On Modal Identification: A Review. Journal Of Mechanical Engineering Technology, 9 (1). pp. 103-121. ISSN 2180-1053 http://journal.utem.edu.my/index.php/jmet/article/view/1517
institution	Universiti Teknikal Malaysia Melaka
building	UTEM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknikal Malaysia Melaka
content_source	UTEM Institutional Repository
url_provider	http://eprints.utem.edu.my/
language	English
topic	T Technology (General) TJ Mechanical engineering and machinery
spellingShingle	T Technology (General) TJ Mechanical engineering and machinery Ramli, Mohd Irman Nuawi, Mohd. Zaki Abdullah, Shahrum Mohammad Rasani, Mohammad Rasidi Salleh, Mohd Shukor Md Basar, Mohd Farriz The Study Of EMA Effect On Modal Identification: A Review
description	Modal Analysis is a common practice to define parameters of structure under scientific view. The properties that come along need to be enlightened so that every circumstance appeared can be tackled in proper manner. Experimental Modal Analysis (EMA) is a well-known procedure for determining modal parameters. The EMA is regarded as an ‘indoor tools’ to examine modal parameters. Meanwhile, Operational Modal Analysis (OMA) on the other hand acts as an ‘outdoor tools’, or operated at site. OMA tests in most engineering applications are not comparable to typical EMA tests. During a typical OMA test, the structure has different boundary conditions than the typical free-free conditions of an EMA test. Therefore, it can be expected that OMA results in many (or even most) engineering applications will show higher damping values than a free-free EMA test. Here, the EMA analysis method will be discussed. Modal parameters consist of mode shape, natural frequency and damping ratio. The study focused on performing mass change strategy via mass normalization of the displacement and strain mode shape occurred in strain EMA. By applying EMA, the mass-normalized displacement and strain mode shapes of the structures can be obtained, through matching the shapes which were calculated by FEM. The results were verified via classic EMA measurement method. One of the benefit of applying mass change strategy is other than obtaining the modal parameter, the strain mode shape parameter also possible to be determined. From the analysis, one can understand that the EMA has its own significant role in detecting modal appeared by mean of vibration. Thus, EMA proven to be a useful method to gain relevant data relating with mechanical properties characteristics other than strain such like stress, impact, tensile, elongation etc.
format	Article
author	Ramli, Mohd Irman Nuawi, Mohd. Zaki Abdullah, Shahrum Mohammad Rasani, Mohammad Rasidi Salleh, Mohd Shukor Md Basar, Mohd Farriz
author_facet	Ramli, Mohd Irman Nuawi, Mohd. Zaki Abdullah, Shahrum Mohammad Rasani, Mohammad Rasidi Salleh, Mohd Shukor Md Basar, Mohd Farriz
author_sort	Ramli, Mohd Irman
title	The Study Of EMA Effect On Modal Identification: A Review
title_short	The Study Of EMA Effect On Modal Identification: A Review
title_full	The Study Of EMA Effect On Modal Identification: A Review
title_fullStr	The Study Of EMA Effect On Modal Identification: A Review
title_full_unstemmed	The Study Of EMA Effect On Modal Identification: A Review
title_sort	study of ema effect on modal identification: a review
publisher	UTeM
publishDate	2017
url	http://eprints.utem.edu.my/id/eprint/20799/2/JMET%20Jun%202017%20Google%20Scholar.pdf http://eprints.utem.edu.my/id/eprint/20799/ http://journal.utem.edu.my/index.php/jmet/article/view/1517
_version_	1705060033357676544
score	13.211869

The Study Of EMA Effect On Modal Identification: A Review

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