• Title/Summary/Keyword: 초대형부유식구조물

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Second Order Elastic Analysis of Superstructures on Very Large Floating Structure with Semi-Rigid Connections (반강접 접합부를 적용한 초대형 부유식 구조물 상부구조체의 2차 탄성해석)

  • Song, Hwa-Cheol;Lee, Eun-Suk
    • Journal of Navigation and Port Research
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    • v.27 no.1
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    • pp.63-70
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    • 2003
  • If semi-rigid connections are used for superstructures of very large floating structures (VLFS), the number of rigid connections can be reduced and more economical construction will be possible. In this study, considering service load and wave load in VLFS, the applicability of mixed use of rigid and semi-rigid connections have been studied using three types of connections for a four-bay eight-story frame. Three types of connections are used; top and seat-angle connections with double web-angle(TSD), extended end plate connections, steel tubular column with square external-diaphragm connections. ABAQUS(Finite element analysis program) is used for conducting second order elastic analysis.

Hydroelastic Behavior for a Very Lagre Floating Structure of Poontoon-Type in Multi-Directional Irregular Waves (다방향불규칙파중의 Pontoon형의 초대형부유식해양구조물에 대한 유탄성응답 특성)

  • Kim, Chel-Hyun;Jo, Hyo-Jae;Lee, Seung-Chul;Goo, Ja-Sam
    • Journal of Ocean Engineering and Technology
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    • v.20 no.4 s.71
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    • pp.83-90
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    • 2006
  • Recently, as the technology of utilization for the ocean space is being advanced, floating structures are asked for being mare and mare huge-scale. A very large floating structure(VLFS) is considered as a flexible structure, because of a quite large length-to-breadth ratio and its geometrical flexibility. The main object of this study is to develop an accurate and convenient method on the hydroelastic response analysis of very large offshore structures on the real sea states. The numerical approach for the hydorelastic responses is based on the combination of the three dimensional source distribution methods, the dynamic response analysis method and the spectral analysis method. A model is considered as many rigid bodies connected elastic beam elements. The calculated results shaw good agreement with the experimental and calculated ones by Ohta.

Wave Response Analysis for Pontoon-type Pier: Very Large Floating Structure (폰툰형 초대형 부유체식 부두의 파랑응답해석)

  • Lee, Sang-Do;Park, Sung-Hyeon;Kong, Gil-Young
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.22 no.1
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    • pp.82-89
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    • 2016
  • In this study, we proposed a pier of pontoon-type, "Very Large Floating Structure" (VLFS), with the length of 500m, breadth of 200 m and height of 2 m in Yeosu domestic port. Since this structure ought to endure wave loads for long periods at sea, it is essential to analyze the wave response characteristics. Direct-method is used to analyze the fluid-structure problem and the coupled motion of equation is used to obtain response results. The structural part is calculated by using finite element method (FEM) and the fluid part is analyzed by using boundary element method (BEM). Dynamic responses caused by the elastic deformation and rigid motion of structure are analyzed by numerical calculation. To investigate response characteristics of the pier in regular waves, several factors such as the wavelength, water depth, wave direction and flexural rigidity of structure are considered. As a result, wave response of pier changed at the point of $L/{\lambda}$ 1.5 and represented the torsional phenomenon according to the various incident waves. And the responses showed increasing tendency as the water depths increase at the incident point in case of $L/{\lambda}=8.0$ and peak point of vertical displacement amplitude moved from side to side as the flexural rigidity of structure changes.