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    The Influence of a Cracked Blade on Rotor’s Free Vibration

    Source: Journal of Vibration and Acoustics:;2008:;volume( 130 ):;issue: 005::page 54502
    Author:
    Yi-Jui Chiu
    ,
    Shyh-Chin Huang
    DOI: 10.1115/1.2948381
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The influence on the coupled vibrations among shaft, disk, and blades of a rotor system due to a cracked blade was investigated analytically. On the shaft-disk-blade system, without a cracked blade, there exist three types of coupled modes, shaft disk blade (SDB), disk blade (DB), and blade-blade. A cracked blade was found to change not only the natural frequencies but also the types of coupled modes. First, the DB modes disappeared and were replaced by SDB modes. Second, in some modes the disk experienced mode localization due to the cracked blade. Numerical results showed that natural frequencies varied with the blade’s crack location and depth. At no bending moment places the crack imposed no effect. The crack affected the natural frequency slightly until its depth reached as deep as 70% then the frequency dropped abruptly.
    keyword(s): Fracture (Materials) , Disks , Blades , Rotors AND Vibration ,
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      The Influence of a Cracked Blade on Rotor’s Free Vibration

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    http://yetl.yabesh.ir/yetl1/handle/yetl/139580
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    contributor authorYi-Jui Chiu
    contributor authorShyh-Chin Huang
    date accessioned2017-05-09T00:31:00Z
    date available2017-05-09T00:31:00Z
    date copyrightOctober, 2008
    date issued2008
    identifier issn1048-9002
    identifier otherJVACEK-28896#054502_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/139580
    description abstractThe influence on the coupled vibrations among shaft, disk, and blades of a rotor system due to a cracked blade was investigated analytically. On the shaft-disk-blade system, without a cracked blade, there exist three types of coupled modes, shaft disk blade (SDB), disk blade (DB), and blade-blade. A cracked blade was found to change not only the natural frequencies but also the types of coupled modes. First, the DB modes disappeared and were replaced by SDB modes. Second, in some modes the disk experienced mode localization due to the cracked blade. Numerical results showed that natural frequencies varied with the blade’s crack location and depth. At no bending moment places the crack imposed no effect. The crack affected the natural frequency slightly until its depth reached as deep as 70% then the frequency dropped abruptly.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleThe Influence of a Cracked Blade on Rotor’s Free Vibration
    typeJournal Paper
    journal volume130
    journal issue5
    journal titleJournal of Vibration and Acoustics
    identifier doi10.1115/1.2948381
    journal fristpage54502
    identifier eissn1528-8927
    keywordsFracture (Materials)
    keywordsDisks
    keywordsBlades
    keywordsRotors AND Vibration
    treeJournal of Vibration and Acoustics:;2008:;volume( 130 ):;issue: 005
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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