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    Numerical Investigation of a Mistuned Academic Bladed Disk Dynamics With Blade/Casing Contact

    Source: Journal of Engineering for Gas Turbines and Power:;2021:;volume( 143 ):;issue: 004::page 041028-1
    Author:
    Joachim, Jeanne
    ,
    Nyssen, Florence
    ,
    Batailly, Alain
    DOI: 10.1115/1.4047780
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This contribution focuses on the combined analysis of mistuning and unilateral blade-tip/casing contacts. A two-dimensional (2D) phenomenological finite element (FE) model of an aircraft engine fan stage is considered. It is reduced by means of the Craig–Bampton component mode synthesis method and contact treatment relies on a Lagrange multiplier algorithm within an explicit time-integration scheme. Blade-tip/casing contacts are initiated through the deformed shape of a perfectly rigid casing. Mistuning is accounted for on the blades only. Monte Carlo simulations are carried out in both linear and nonlinear configurations, which allows to compare amplifications predicted in both context due to mistuning. Following a thorough convergence analysis of the proposed numerical strategy, the influence of mistuning level as well as the configuration of the external forcing are investigated. Presented results underline the detrimental consequences of mistuning in a nonlinear structural context, yielding even higher vibration amplifications than in a linear context. A cross-analysis between linear and nonlinear computations reveals that no correlation is found between linear and nonlinear amplifications which suggests that the effect of existing strategies to mitigate vibration amplifications within a linear context may not be suitable within a nonlinear context.
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      Numerical Investigation of a Mistuned Academic Bladed Disk Dynamics With Blade/Casing Contact

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4277387
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    contributor authorJoachim, Jeanne
    contributor authorNyssen, Florence
    contributor authorBatailly, Alain
    date accessioned2022-02-05T22:21:16Z
    date available2022-02-05T22:21:16Z
    date copyright3/12/2021 12:00:00 AM
    date issued2021
    identifier issn0742-4795
    identifier othergtp_143_04_041028.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4277387
    description abstractThis contribution focuses on the combined analysis of mistuning and unilateral blade-tip/casing contacts. A two-dimensional (2D) phenomenological finite element (FE) model of an aircraft engine fan stage is considered. It is reduced by means of the Craig–Bampton component mode synthesis method and contact treatment relies on a Lagrange multiplier algorithm within an explicit time-integration scheme. Blade-tip/casing contacts are initiated through the deformed shape of a perfectly rigid casing. Mistuning is accounted for on the blades only. Monte Carlo simulations are carried out in both linear and nonlinear configurations, which allows to compare amplifications predicted in both context due to mistuning. Following a thorough convergence analysis of the proposed numerical strategy, the influence of mistuning level as well as the configuration of the external forcing are investigated. Presented results underline the detrimental consequences of mistuning in a nonlinear structural context, yielding even higher vibration amplifications than in a linear context. A cross-analysis between linear and nonlinear computations reveals that no correlation is found between linear and nonlinear amplifications which suggests that the effect of existing strategies to mitigate vibration amplifications within a linear context may not be suitable within a nonlinear context.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleNumerical Investigation of a Mistuned Academic Bladed Disk Dynamics With Blade/Casing Contact
    typeJournal Paper
    journal volume143
    journal issue4
    journal titleJournal of Engineering for Gas Turbines and Power
    identifier doi10.1115/1.4047780
    journal fristpage041028-1
    journal lastpage041028-11
    page11
    treeJournal of Engineering for Gas Turbines and Power:;2021:;volume( 143 ):;issue: 004
    contenttypeFulltext
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