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    Global Responses of Struck Ships in Collision With Emphasis on Hydrodynamic Effects

    Source: Journal of Offshore Mechanics and Arctic Engineering:;2015:;volume( 137 ):;issue: 004::page 41601
    Author:
    Jia, Huirong
    ,
    Moan, Torgeir
    DOI: 10.1115/1.4030343
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Hydrodynamic effects in ship collisions are usually considered by increased inertia force in the form of the equivalent added mass. It is necessary to reasonably estimate the equivalent added mass to calculate energy absorbed by ships in collisions. In this paper, motion equations in the horizontal plane for the struck rigid ship are first established considering hydrodynamic effects in the form of added mass, linear, and quadratic damping. The equivalent added mass are obtained in three ways and analyzed. It is shown that the equivalent added mass for the sway motion depends on not only the duration of collision impact, impact force, but also the collision position, while the equivalent added mass for the yaw motion could be assumed to be independent of the collision position. In addition, a simple formula is proposed to relate the equivalent added mass for part of the vessel to that of the whole vessel, provided that the underwater area of the transverse section is known. As a consequence, it is possible to estimate rigid hull girder responses based on the simplified methodology, which could be used in design and probabilistic collision analyses. In the end, the hull girder responses are estimated considering both a flexible and rigid vessel. Comparisons are made between rigid and flexible hull girder responses.
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      Global Responses of Struck Ships in Collision With Emphasis on Hydrodynamic Effects

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    http://yetl.yabesh.ir/yetl1/handle/yetl/159383
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    • Journal of Offshore Mechanics and Arctic Engineering

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    contributor authorJia, Huirong
    contributor authorMoan, Torgeir
    date accessioned2017-05-09T01:22:45Z
    date available2017-05-09T01:22:45Z
    date issued2015
    identifier issn0892-7219
    identifier otheromae_137_04_041601.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/159383
    description abstractHydrodynamic effects in ship collisions are usually considered by increased inertia force in the form of the equivalent added mass. It is necessary to reasonably estimate the equivalent added mass to calculate energy absorbed by ships in collisions. In this paper, motion equations in the horizontal plane for the struck rigid ship are first established considering hydrodynamic effects in the form of added mass, linear, and quadratic damping. The equivalent added mass are obtained in three ways and analyzed. It is shown that the equivalent added mass for the sway motion depends on not only the duration of collision impact, impact force, but also the collision position, while the equivalent added mass for the yaw motion could be assumed to be independent of the collision position. In addition, a simple formula is proposed to relate the equivalent added mass for part of the vessel to that of the whole vessel, provided that the underwater area of the transverse section is known. As a consequence, it is possible to estimate rigid hull girder responses based on the simplified methodology, which could be used in design and probabilistic collision analyses. In the end, the hull girder responses are estimated considering both a flexible and rigid vessel. Comparisons are made between rigid and flexible hull girder responses.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleGlobal Responses of Struck Ships in Collision With Emphasis on Hydrodynamic Effects
    typeJournal Paper
    journal volume137
    journal issue4
    journal titleJournal of Offshore Mechanics and Arctic Engineering
    identifier doi10.1115/1.4030343
    journal fristpage41601
    journal lastpage41601
    identifier eissn1528-896X
    treeJournal of Offshore Mechanics and Arctic Engineering:;2015:;volume( 137 ):;issue: 004
    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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