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    Underwater Pipeline Inspection Using Guided Waves

    Source: Journal of Pressure Vessel Technology:;2002:;volume( 124 ):;issue: 002::page 196
    Author:
    Won-Bae Na
    ,
    Tribikram Kundu
    DOI: 10.1115/1.1466456
    Publisher: 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 ,
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      Underwater Pipeline Inspection Using Guided Waves

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/127360
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    • Journal of Pressure Vessel Technology

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    contributor authorWon-Bae Na
    contributor authorTribikram Kundu
    date accessioned2017-05-09T00:08:31Z
    date available2017-05-09T00:08:31Z
    date copyrightMay, 2002
    date issued2002
    identifier issn0094-9930
    identifier otherJPVTAS-28417#196_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/127360
    description abstractUnderwater 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.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleUnderwater Pipeline Inspection Using Guided Waves
    typeJournal Paper
    journal volume124
    journal issue2
    journal titleJournal of Pressure Vessel Technology
    identifier doi10.1115/1.1466456
    journal fristpage196
    journal lastpage200
    identifier eissn1528-8978
    keywordsInspection
    keywordsProduct quality
    keywordsUnderwater pipelines
    keywordsWaves
    keywordsPipes
    keywordsWater
    keywordsTransducers
    keywordsAluminum
    keywordsSignals AND Metals
    treeJournal of Pressure Vessel Technology:;2002:;volume( 124 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian