Underwater Pipeline Inspection Using Guided WavesSource: Journal of Pressure Vessel Technology:;2002:;volume( 124 ):;issue: 002::page 196DOI: 10.1115/1.1466456Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Underwater pipeline inspections are conducted using ultrasonic cylindrical guided waves in the laboratory environment. Three different types of mechanical defects—gouge, removed metal, and dent—are fabricated in small-diameter, 22.22-mm, aluminum pipes and tested. To efficiently propagate the antisymmetric (flexural) cylindrical guided waves through the aluminum pipe in water, a new transducer holder device is designed. The device uses commercially available ultrasonic transducers that generate compressional ultrasonic waves in the water. The device can change the striking angle of the incident beam from 0 to 51 deg. With the help of this device, the incident angle adjustment and frequency sweeping can be carried out. This is necessary for obtaining the time history of the received signals for various incident angles and signal frequencies; then these time histories are converted to V(f) curves, or received signal amplitude versus frequency curves. From the amplitude of these V(f) curves, the type and extent of the mechanical defects can be estimated. This investigation shows that the new coupler device can be effectively used for health monitoring of underwater pipelines using guided waves.
keyword(s): Inspection , Product quality , Underwater pipelines , Waves , Pipes , Water , Transducers , Aluminum , Signals AND Metals ,
|
Collections
Show full item record
contributor author | Won-Bae Na | |
contributor author | Tribikram Kundu | |
date accessioned | 2017-05-09T00:08:31Z | |
date available | 2017-05-09T00:08:31Z | |
date copyright | May, 2002 | |
date issued | 2002 | |
identifier issn | 0094-9930 | |
identifier other | JPVTAS-28417#196_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/127360 | |
description abstract | Underwater pipeline inspections are conducted using ultrasonic cylindrical guided waves in the laboratory environment. Three different types of mechanical defects—gouge, removed metal, and dent—are fabricated in small-diameter, 22.22-mm, aluminum pipes and tested. To efficiently propagate the antisymmetric (flexural) cylindrical guided waves through the aluminum pipe in water, a new transducer holder device is designed. The device uses commercially available ultrasonic transducers that generate compressional ultrasonic waves in the water. The device can change the striking angle of the incident beam from 0 to 51 deg. With the help of this device, the incident angle adjustment and frequency sweeping can be carried out. This is necessary for obtaining the time history of the received signals for various incident angles and signal frequencies; then these time histories are converted to V(f) curves, or received signal amplitude versus frequency curves. From the amplitude of these V(f) curves, the type and extent of the mechanical defects can be estimated. This investigation shows that the new coupler device can be effectively used for health monitoring of underwater pipelines using guided waves. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Underwater Pipeline Inspection Using Guided Waves | |
type | Journal Paper | |
journal volume | 124 | |
journal issue | 2 | |
journal title | Journal of Pressure Vessel Technology | |
identifier doi | 10.1115/1.1466456 | |
journal fristpage | 196 | |
journal lastpage | 200 | |
identifier eissn | 1528-8978 | |
keywords | Inspection | |
keywords | Product quality | |
keywords | Underwater pipelines | |
keywords | Waves | |
keywords | Pipes | |
keywords | Water | |
keywords | Transducers | |
keywords | Aluminum | |
keywords | Signals AND Metals | |
tree | Journal of Pressure Vessel Technology:;2002:;volume( 124 ):;issue: 002 | |
contenttype | Fulltext |