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    Assessment of Two Harmonic Balance MethodBased Numerical Strategies for BladeTip/Casing Interactions: Application to NASA Rotor 67

    Source: Journal of Engineering for Gas Turbines and Power:;2022:;volume( 144 ):;issue: 012::page 121004
    Author:
    Vadcard, Thibaut;Colaïtis, Yann;Batailly, Alain;Thouverez, Fabrice
    DOI: 10.1115/1.4055416
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The study presented in this paper focuses on the analysis of rubbing interactions—including unilateral contact and dry friction—between a rotating fan blade and a rigid casing by frequency domain methods. Two previously published Harmonic Balance Methodbased methodologies are assessed: (1) an approach relying on augmented Lagrangians and (2) a second method using a regularized penalty law combined with a Lanczos σapproximation filter. As a reference point for this comparison, a timedomain numerical strategy relying on a Lagrange multiplierbased contact treatment is considered. All computations are run with the NASA rotor 67 fan blade, an open industrial blade geometry. As it undergoes structural contacts, this blade features an intricate dynamics response, thus making it a challenging case study for nonlinear iterative solvers. The contact scenario is chosen to be an ovalization of the casing with no external forcing. This scenario induces highly nonlinear responses of the blade and complex phenomena such as isolated frequency response curves. The results presented underline a very good agreement of the different strategies with the reference time marching approach. An indepth comparison is made with an emphasis on nonlinear frequency response curves (NFRC) and time signals. Finally, a physical analysis of the encountered isolas is presented through an indepth investigation of the main modal contributions for each computed solution. In the end, this paper provides new qualitative elements allowing for a better understanding of rubbing interactions that may not be efficiently obtained with time marching procedures.
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      Assessment of Two Harmonic Balance MethodBased Numerical Strategies for BladeTip/Casing Interactions: Application to NASA Rotor 67

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    contributor authorVadcard, Thibaut;Colaïtis, Yann;Batailly, Alain;Thouverez, Fabrice
    date accessioned2023-04-06T12:49:10Z
    date available2023-04-06T12:49:10Z
    date copyright10/4/2022 12:00:00 AM
    date issued2022
    identifier issn7424795
    identifier othergtp_144_12_121004.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4288564
    description abstractThe study presented in this paper focuses on the analysis of rubbing interactions—including unilateral contact and dry friction—between a rotating fan blade and a rigid casing by frequency domain methods. Two previously published Harmonic Balance Methodbased methodologies are assessed: (1) an approach relying on augmented Lagrangians and (2) a second method using a regularized penalty law combined with a Lanczos σapproximation filter. As a reference point for this comparison, a timedomain numerical strategy relying on a Lagrange multiplierbased contact treatment is considered. All computations are run with the NASA rotor 67 fan blade, an open industrial blade geometry. As it undergoes structural contacts, this blade features an intricate dynamics response, thus making it a challenging case study for nonlinear iterative solvers. The contact scenario is chosen to be an ovalization of the casing with no external forcing. This scenario induces highly nonlinear responses of the blade and complex phenomena such as isolated frequency response curves. The results presented underline a very good agreement of the different strategies with the reference time marching approach. An indepth comparison is made with an emphasis on nonlinear frequency response curves (NFRC) and time signals. Finally, a physical analysis of the encountered isolas is presented through an indepth investigation of the main modal contributions for each computed solution. In the end, this paper provides new qualitative elements allowing for a better understanding of rubbing interactions that may not be efficiently obtained with time marching procedures.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleAssessment of Two Harmonic Balance MethodBased Numerical Strategies for BladeTip/Casing Interactions: Application to NASA Rotor 67
    typeJournal Paper
    journal volume144
    journal issue12
    journal titleJournal of Engineering for Gas Turbines and Power
    identifier doi10.1115/1.4055416
    journal fristpage121004
    journal lastpage12100411
    page11
    treeJournal of Engineering for Gas Turbines and Power:;2022:;volume( 144 ):;issue: 012
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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