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    Post-Critical Behavior of Suspension Bridges Under Nonlinear Aerodynamic Loading

    Source: Journal of Computational and Nonlinear Dynamics:;2016:;volume( 011 ):;issue: 001::page 11005
    Author:
    Arena, Andrea
    ,
    Lacarbonara, Walter
    ,
    Marzocca, Pier
    DOI: 10.1115/1.4030040
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The limit cycle oscillations (LCOs) exhibited by long-span suspension bridges in post-flutter condition are investigated. A parametric dynamic model of prestressed long-span suspension bridges is coupled with a nonlinear quasi-steady aerodynamic formulation to obtain the governing aeroelastic partial differential equations adopted herewith. By employing the Faedo–Galerkin method, the aeroelastic nonlinear equations are reduced to their state-space ordinary differential form. Convergence analysis for the reduction process is first carried out and time-domain simulations are performed to investigate LCOs while continuation tools are employed to path follow the post-critical LCOs. A supercritical Hopf bifurcation behavior, confirmed by a stable LCO, is found past the critical flutter condition. The analysis shows that the LCO amplitude increases with the wind speed up to a secondary critical speed where it terminates with a fold bifurcation. The stability of the LCOs within the range bracketed by the Hopf and fold bifurcations is evaluated by performing parametric analyses regarding the main design parameters that can be affected by uncertainties, primarily the structural damping and the initial wind angle of attack.
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      Post-Critical Behavior of Suspension Bridges Under Nonlinear Aerodynamic Loading

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4236325
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    • Journal of Computational and Nonlinear Dynamics

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    contributor authorArena, Andrea
    contributor authorLacarbonara, Walter
    contributor authorMarzocca, Pier
    date accessioned2017-11-25T07:20:16Z
    date available2017-11-25T07:20:16Z
    date copyright2015/06/30
    date issued2016
    identifier issn1555-1415
    identifier othercnd_011_01_011005.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4236325
    description abstractThe limit cycle oscillations (LCOs) exhibited by long-span suspension bridges in post-flutter condition are investigated. A parametric dynamic model of prestressed long-span suspension bridges is coupled with a nonlinear quasi-steady aerodynamic formulation to obtain the governing aeroelastic partial differential equations adopted herewith. By employing the Faedo–Galerkin method, the aeroelastic nonlinear equations are reduced to their state-space ordinary differential form. Convergence analysis for the reduction process is first carried out and time-domain simulations are performed to investigate LCOs while continuation tools are employed to path follow the post-critical LCOs. A supercritical Hopf bifurcation behavior, confirmed by a stable LCO, is found past the critical flutter condition. The analysis shows that the LCO amplitude increases with the wind speed up to a secondary critical speed where it terminates with a fold bifurcation. The stability of the LCOs within the range bracketed by the Hopf and fold bifurcations is evaluated by performing parametric analyses regarding the main design parameters that can be affected by uncertainties, primarily the structural damping and the initial wind angle of attack.
    publisherThe American Society of Mechanical Engineers (ASME)
    titlePost-Critical Behavior of Suspension Bridges Under Nonlinear Aerodynamic Loading
    typeJournal Paper
    journal volume11
    journal issue1
    journal titleJournal of Computational and Nonlinear Dynamics
    identifier doi10.1115/1.4030040
    journal fristpage11005
    journal lastpage011005-11
    treeJournal of Computational and Nonlinear Dynamics:;2016:;volume( 011 ):;issue: 001
    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
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