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    Maximum Amplification of Blade Response due to Mistuning: Localization and Mode Shape Aspects of the Worst Disks

    Source: Journal of Turbomachinery:;2003:;volume( 125 ):;issue: 003::page 442
    Author:
    Alejandro J. Rivas-Guerra
    ,
    Assoc. Mem. ASME
    ,
    Marc P. Mignolet
    DOI: 10.1115/1.1506958
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This paper focuses on the determination and study of the maximum amplification of the steady state forced response of bladed disks due to mistuning. First, an optimization strategy is proposed in which partially mistuned bladed disks are considered as physical approximations of the worst case disk and the mistuned properties are sought to maximize the response of a specific blade. This approach is exemplified on both a reduced order model of a blisk and a single-degree-of-freedom per blade disk model an extensive parametric study of which is conducted with respect to blade-to-blade coupling, damping, and engine order. A mode shape-based formulation of the amplification factor is then developed to clarify the findings of the parametric study in the strong coupling/small damping limit. In this process, the upper bound of Whitehead is recovered for all engine orders and number of blades and the conditions under which this limit is exactly achieved or closely approached are clarified. This process also uncovers a simple yet reliable approximation of the resonant mode shapes and natural frequencies of the worst disk.
    keyword(s): Optimization , Disks , Blades , Frequency , Shapes , Engines AND Damping ,
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      Maximum Amplification of Blade Response due to Mistuning: Localization and Mode Shape Aspects of the Worst Disks

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    http://yetl.yabesh.ir/yetl1/handle/yetl/129238
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    contributor authorAlejandro J. Rivas-Guerra
    contributor authorAssoc. Mem. ASME
    contributor authorMarc P. Mignolet
    date accessioned2017-05-09T00:11:39Z
    date available2017-05-09T00:11:39Z
    date copyrightJuly, 2003
    date issued2003
    identifier issn0889-504X
    identifier otherJOTUEI-28704#442_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/129238
    description abstractThis paper focuses on the determination and study of the maximum amplification of the steady state forced response of bladed disks due to mistuning. First, an optimization strategy is proposed in which partially mistuned bladed disks are considered as physical approximations of the worst case disk and the mistuned properties are sought to maximize the response of a specific blade. This approach is exemplified on both a reduced order model of a blisk and a single-degree-of-freedom per blade disk model an extensive parametric study of which is conducted with respect to blade-to-blade coupling, damping, and engine order. A mode shape-based formulation of the amplification factor is then developed to clarify the findings of the parametric study in the strong coupling/small damping limit. In this process, the upper bound of Whitehead is recovered for all engine orders and number of blades and the conditions under which this limit is exactly achieved or closely approached are clarified. This process also uncovers a simple yet reliable approximation of the resonant mode shapes and natural frequencies of the worst disk.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleMaximum Amplification of Blade Response due to Mistuning: Localization and Mode Shape Aspects of the Worst Disks
    typeJournal Paper
    journal volume125
    journal issue3
    journal titleJournal of Turbomachinery
    identifier doi10.1115/1.1506958
    journal fristpage442
    journal lastpage454
    identifier eissn1528-8900
    keywordsOptimization
    keywordsDisks
    keywordsBlades
    keywordsFrequency
    keywordsShapes
    keywordsEngines AND Damping
    treeJournal of Turbomachinery:;2003:;volume( 125 ):;issue: 003
    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