Detecting and monitoring defects and damages on a pipeline using self-develop guided lamb wave system

This project was done as a first step to develop applied technology for Lamb wave Structural Health Monitoring (SHM) system. First part was to self-develop the system, where we concentrate on the actuator and sensor using piezoelectric buzzer (PB) that can be easily obtained in the market. In determ...

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Main Author:	Ismail, Mohd. Nasiruddin
Format:	Thesis
Language:	English
Published:	2014
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/53475/25/MohdNasiruddinIsmailMFKM2014.pdf
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spelling	my-utm-ep.534752020-07-16T01:12:27Z Detecting and monitoring defects and damages on a pipeline using self-develop guided lamb wave system 2014-09 Ismail, Mohd. Nasiruddin TJ Mechanical engineering and machinery This project was done as a first step to develop applied technology for Lamb wave Structural Health Monitoring (SHM) system. First part was to self-develop the system, where we concentrate on the actuator and sensor using piezoelectric buzzer (PB) that can be easily obtained in the market. In determining its feasibility; we investigate its natural frequency, electrical to mechanical conversion and vice versa, its performance against different frequency and its circuit configuration in relation to the systems. From there, we configure the system to create the simplest system to generate and detect the Lamb wave. From this system, we experimenting the symmetrical and asymmetrical wave on a mild steel plate with a thickness of 1mm for frequency between 0-2000Hz to find its velocity and used it to compare to the theoretical calculation. Second part was using the self-develop SHM system, we introduce defects or asymmetrical obstacle to the plate. The asymmetrical obstacle parameter was manipulated where we change the distance of the defect from the actuator, the mass of the defect and the area of contact. It was discovered that the Lamb wave velocity changes with the distance and with the surface area of contact of the obstacle but do not change with mass. The wave amplitude ratio changes with distance and surface area of contact but do not change with mass. Although it was still a crude design but some obstacle could be detected by this self-developed Lamb wave SHM system. 2014-09 Thesis http://eprints.utm.my/id/eprint/53475/ http://eprints.utm.my/id/eprint/53475/25/MohdNasiruddinIsmailMFKM2014.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85313 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 Ismail, Mohd. Nasiruddin Detecting and monitoring defects and damages on a pipeline using self-develop guided lamb wave system
description	This project was done as a first step to develop applied technology for Lamb wave Structural Health Monitoring (SHM) system. First part was to self-develop the system, where we concentrate on the actuator and sensor using piezoelectric buzzer (PB) that can be easily obtained in the market. In determining its feasibility; we investigate its natural frequency, electrical to mechanical conversion and vice versa, its performance against different frequency and its circuit configuration in relation to the systems. From there, we configure the system to create the simplest system to generate and detect the Lamb wave. From this system, we experimenting the symmetrical and asymmetrical wave on a mild steel plate with a thickness of 1mm for frequency between 0-2000Hz to find its velocity and used it to compare to the theoretical calculation. Second part was using the self-develop SHM system, we introduce defects or asymmetrical obstacle to the plate. The asymmetrical obstacle parameter was manipulated where we change the distance of the defect from the actuator, the mass of the defect and the area of contact. It was discovered that the Lamb wave velocity changes with the distance and with the surface area of contact of the obstacle but do not change with mass. The wave amplitude ratio changes with distance and surface area of contact but do not change with mass. Although it was still a crude design but some obstacle could be detected by this self-developed Lamb wave SHM system.
format	Thesis
qualification_level	Master's degree
author	Ismail, Mohd. Nasiruddin
author_facet	Ismail, Mohd. Nasiruddin
author_sort	Ismail, Mohd. Nasiruddin
title	Detecting and monitoring defects and damages on a pipeline using self-develop guided lamb wave system
title_short	Detecting and monitoring defects and damages on a pipeline using self-develop guided lamb wave system
title_full	Detecting and monitoring defects and damages on a pipeline using self-develop guided lamb wave system
title_fullStr	Detecting and monitoring defects and damages on a pipeline using self-develop guided lamb wave system
title_full_unstemmed	Detecting and monitoring defects and damages on a pipeline using self-develop guided lamb wave system
title_sort	detecting and monitoring defects and damages on a pipeline using self-develop guided lamb wave system
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2014
url	http://eprints.utm.my/id/eprint/53475/25/MohdNasiruddinIsmailMFKM2014.pdf
_version_	1747817564357001216

Detecting and monitoring defects and damages on a pipeline using self-develop guided lamb wave system

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