• 대한조선학회논문집
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• 제38권2호
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• pp.19-25
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• 2001

부유식 초대형 해상구조물(VLFS : Very Large Floating Structures)의 구조설계는 대상 구조물의 종류와 그 구조형식 등에 따라 구체적인 설계조건 혹은 설계의 기본 계획이 달리 나타날 수 있다. 본 연구에서는 설계조건의 설정, 구조형식 및 재료의 선택, 설계하중의 추정, 부재 배치 및 치수결정 등의 과정으로 나타나는 초대형 해상구조물의 구조설계 기법에 관하여 기술하고, 구체적인 적용례로서 부산 해상공항 및 컨테이너 물류기지 개발안에 대한 초기 구조설계 과정과 그 결과를 소개한다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 춘계학술대회논문집
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• pp.698-702
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• 2005

Natural modes and responses of floating structures under wave loads are analyzed by direct method considering the stiffness of unit connections. Tow types of connection such as tandem connection and side by side connection are considered in numerical examples. By analyzing natural modes and connection forces, influences of connection stiffness on responses of floating structures are investigated.

• 한국해양공학회지
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• 제10권3호
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• pp.62-73
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• 1996

Numerical simulation is made of the three-dimensional wave breaking motion about a part of a floating offshore structure containing a circular cylinder mounted vertically onto a lower hull in regular periodic gravity wave generated by a numerical wave maker. TUMMAC-VIII finite-difference method is newly developed for such a problem. By use of density-function technique the three-dimensional wave breaking motion is approximately implenented in the framework of rectangular grid system. A porosity technique is devised for the implementation of the no-slip bydy boundary conditions. The generation of breaking waves by the interaction of incident waves with the structure is well simulated and interesting features of breaking waves are revealed with containing degree of quantitative and qualitative accuracy.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2000년도 춘계학술대회 논문집
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• pp.63-68
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• 2000

A very large floating structure has rather small motion characteristics as to the whole body, while the motion at end part of such structure becomes largest due to the elastic motion of the structure. This paper presents on the theoretical result on the relative motion characteristics and green water phenomena of VLFS in waves This phenomena affect not only to strength of the structure but also the determination of depth of structure. To predict motion responses of structure in regular waves, the source-dipole distribution method and F.E.M is used By irregular wave results, the probability of occurrence of green water and response of the structure were calculated.

• 한국해양공학회지
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• 제11권1호
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• pp.74-83
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• 1997

This study is to develop a practical calculation method of hydrodynamic force and motion response on very large floating structures of multiple legs. To investigate the effecr of hydrodynamic interfaction and of free surface on the reaponses of very large floating structures in regular waves, four kind of models are considered, ie. 1, 4, 64, 21248 column with footing. Based upon the results of this study, it is found that the middle parts of very large floating structures have small diffration effects. Therefore only out side parts are used to determine the hydrodynamic forcea for taking into account the effects of interaction.

• 한국소음진동공학회논문집
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• 제16권2호
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• pp.132-140
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• 2006

This paper investigates the characteristics of dynamic responses of floating structures with connections under sea wave loads. Direct method using higher order boundary element method (HOBEM) and finite element method (FEM) is adopted for numerical analysis. A 500 m-long and 250-m width very large floating structure (VLFS) with four units are considered in numerical analysis. Hinge connection and spring connection with various strength are considered as connection types. Displacements and stresses of VLFS according to the connection types are compared considering wave period and heading angle reduction.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2010년도 정기 학술대회
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• pp.106-109
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• 2010

구조시스템의 동적 특성은 구조 모델 업데이트, 구조 헬스 모니터링, 구조 제어 분야에서 기초자료로 활용되기 때문에 많은 연구자들의 관심을 받고 있다. 본 논문에서는 부유식구조물의 축소모형을 대상으로 진동실험을 수행하였으며, 계측한 실험데이터로부터 고유진동수와 모드형상을 추출하였다. 실험에서 구한 진동특성 결과는 유한요소 모델의 결과와 비교하였으며, 계측한 모드형상과 수치해석으로 계산된 모드형상의 상관관계를 수록하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2012년도 추계학술대회
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• pp.285-287
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• 2012

염해는 철근 콘크리트 구조물의 주요 열화원인으로서 특히 수해양 부유식 건축물의 상부구조는 비래염분에 의한 피해에 노출되어 있고, 해수에 접하고 있는 함체는 다공질 콘크리트의 모세관으로 염수이온이 침투하므로 상당히 높은 수위의 열화 환경에 노출되어 있다고 분류할 수 있다. 본 연구는 해양에서 유입되는 비래염분량을 정량화하여 철근 콘크리트 구조물 뿐만아니라 강재 건자재의 장수명화를 꾀하는 기초자료를 구축하고자 하였다. 1년간에 걸쳐 측정된 비래염분유입 지역은 기존연구에서 조사된 1km 범위을 상당히 초과하고 있으며 그 량도 강재 발청농도를 탁월하게 상회하는 것으로 분석되었다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 추계학술대회논문집
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• pp.895-902
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• 2005

This paper investigates the characteristics of dynamic responses of floating structures with connections under sea wave loads. Direct method using higher order boundary element method and finite element method is adopted for numerical analysis. 500 m-long VLFS with four units are considered in numerical analysis. Hinge connection and spring connection with various strength are considered as connection types. Displacements and stresses of VLFS according to the connection types are compared considering wave period and heading angle.

• 대한조선학회논문집
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• 제41권3호
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• pp.22-27
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• 2004

Waveheight attenuation efficiencies of floating breakwaters in water of finite depth for a VLFS are studied numerically in accordance with the two body radiation-diffraction problem. Four different forms of the breaker are tested with a solid VLFS. The radiation-diffraction wave elevations between the breakwater and the VLFS are predicted directly instead of the far-field transmission-reflection coefficients of the breakwater.