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Editors-in-Chief
    Prof. Pal G. Bergan
    Dept of Structural Eng,
    Norwegian Univ of Sci & Tech
    Prof. Moo-Hyun Kim
    Dept of Civil Eng, Texas A&M Univ
Associate Editors
    Prof. Hyun Chung
    Division of Ocean Systems Eng, KAIST
Managing Editor
    Prof. Chang-Koon Choi
    Dept. of Civil & Environmental Eng, KAIST


 ESCI
ISSN: 2093-6702(Print), ISSN: 2093-677X(Online)
Vol. 7 (4 issues) for 2017, Quarterly
Aims and Scope

The OCEAN SYSTEMS ENGINEERING focuses on the new research and development efforts to advance the understanding of sciences and technologies in ocean systems engineering. The main subject of the journal is the multi-disciplinary engineering of ocean systems. Areas covered by the journal include; * Undersea technologies: AUVs, submersible robot, manned/unmanned submersibles, remotely operated underwater vehicle, sensors, instrumentation, measurement, and ocean observing systems; * Ocean systems technologies: ocean structures and structural systems, design and production, ocean process and plant, fatigue, fracture, reliability and risk analysis, dynamics of ocean structure system, probabilistic dynamics analysis, fluid-structure interaction, ship motion and mooring system, and port engineering; * Ocean hydrodynamics and ocean renewable energy, wave mechanics, buoyancy and stability, sloshing, slamming, and seakeeping; * Multi-physics based engineering analysis, design and testing: underwater explosions and their effects on ocean vehicle systems, equipments, and surface ships, survivability and vulnerability, shock, impact and vibration; * Modeling and simulations; * Underwater acoustics technologies.
Editorial Board

Prof. Felice Arena
Dept. of Ocean Eng.
Mediterranea' U Reggio Calabria


Prof. Sakir Bal
Dept. of Naval Arch. and Ocean Eng.
Istanbul Technical Univ.


Prof. Eng Soon Chan
Dept. of Civil Eng.
National Univ. of Singapore


Prof. H. C. Chen
Dept. of Civil Eng.
Texas A&M University


Dr. Guohai Dong
Dept. of Civil Hydraulic Eng.
Dalian Univ. of Technology


Prof. Menglan Duan
Dept. of Offshore Oil/Gas Res.Center
China Univ. of Petroleum


Prof. Isaac Elishakoff
Dept. of Ocean and Mechanical Eng.
Florida Atlantic Univ


Prof. Jeff Falzarano
Dept. of Civil Eng.
Texas A&M University


Prof. Ming-Chung Fang
Dept. of System & Naval Mechtro. Eng.
National Cheung Kung Univ.


Prof. Joshua H. Gordis
Dept. of Mech. and Astronautical Eng.
Naval Postgraduate School


Prof. Federico Guarracino
Dept. Of Structural Eng.
Univ. of Naples "Federico II"


Prof. Atilla Incecik
Dept. of Naval Arch. and Marine Eng.
Univ. of Strathclyde-Glassgow


Prof. Joe Watkins
Dept. of Mechanical Eng.
U.S. Naval Academy


Prof. Ken Takagi
Dept. of Ocean Tech., Policy, and Env.
Univ. of Tokyo


Prof. Dale. G. Karr
Dept. of Naval Arch. and Marine Eng.
University of Michigan


Dr. Mohammad Javad Ketabdari
Dept. Of Marine Tech.
Amirkabir Univ. of Tech
Prof. Boo Cheong Khoo
Dept. of Mechanical Eng.
National Univ. of Singapore


Prof. Byoung Wan Kim
MOERI
Korea Ocean Research & Dev. Inst.


Prof. Young-bok Kim
Dept. of Naval Arch. & Ocean Eng.
Kyungnam Univ.


Prof. Spyros Kinnas
Dept. of Civil Eng.
Univ. of Texas, Austin


Prof. Evangelos Koutandos
Dept. of Civil Eng.
Technol. Educational Inst. of Crete


Dr. Chi-Min Liu
General Education Center
Chienkuo Tech Univ.


Prof. Haixiao Liu
Port, Coastal and Offshore Eng.
Tianjin University


Prof. Prof. Yong Liu
Dept. of Ocean Eng.
Ocean Univ. of China


Prof. Cheolho Ryu
Dept. of Ship and Ocean Systm
Inha Technical Collge


Prof. Pijush Samui
Dept. of Mitigation and Management
VIT Univ.


Prof. Clyde Scandrett
Dept. of Applied Mathematics
Naval Postgraduate School


Prof. Lian Shen
Dept. of Mechanical Eng.
Univ. of Minnesota


Prof. Carlos Guedes Soares
Center for Marine Tech & Eng.
Technical Univ. of Lisbon


Prof. Kostas Spyrou
Dept. of Naval Arch. And Marine Eng.
National Tech. Univ. of Athens


Dr. Yuming Liu
Dept. of Mechanical Eng.
MIT
Prof. Han Soo Lee
Dept. of Civil Eng.
Saitama University


Prof. Seung-O Lee
Dept. of Civil Eng.
Hongik University


Prof. Wang Chien Ming
Engineering Science Prog.
National Univ. of Singapore


Prof. Dag Myrhaug
Dept. of Marine Technology
Norwegian Univ. of Sci. and Tech.


Dr. S. Neelamani
Environment & Urban Develop. Div.
Kuwait Inst for Scientific Research


Prof. Roger Ohayon
Chair of Mechanics
CNAM


Prof. Muk Chen Ong
Dept. of Mech. Struct. Eng. Mater. Sci.
Univ. of Stavanger


Prof. Fotis A. Papoulias
Dept. of Mech. and Astronautical Eng.
Naval Postgraduate School


Dr. Jun Ren
Dept. of Ocean Eng.
Liverpool John Moores Univ.


Prof. Jose Roesset
Dep. of Civil Eng.
Texas A&M University


Prof. Myung Il Roh
Dept. of Naval Arch. & Ocean Eng.
Seoul National University


Prof. Alexander N. Timokha
Inst. of Mathematics
Nat'l Academy of Sci.of Ukraine (NASU)


Dr. R. Venkatesan
Ocean Observation Systems
Nat'l Inst. Ocean Technol.
Ministry of Earth Sciences


Prof. Eugen Victor Cristian Rusu
Dept. of Applied Mechanics
Dunarea de Jos Galati Univ.


Dr. Jun Zou
Houston Offshore Inc.





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Sample issue
Volume 2, Number 1, March 2012
  • Multi-level structural modeling of an offshore wind turbine
    Francesco Petrini, Konstantinos Gkoumas, Wensong Zhou and Hui Li
    Abstract; Full Text (4054K)

Abstract
Offshore wind turbines are complex structural and mechanical systems located in a highly demanding environment. This paper proposes a multi-level system approach for studying the structural behavior of the support structure of an offshore wind turbine. In accordance with this approach, a proper numerical modeling requires the adoption of a suitable technique in order to organize the qualitative and quantitative assessment in various sub-problems, which can be solved by means of sub-models at different levels of detail, both for the structural behavior and for the simulation of loads. Consequently, in a first place, the effects on the structural response induced by the uncertainty of the parameters used to describe the environmental actions and the finite element model of the structure are inquired. After that, a mesolevel FEM model of the blade is adopted in order to obtain the detailed load stress on the blade/hub connection.

Key Words
probabilistic analysis; performance-based design; uncertainty propagation; rotating blades

Address
Francesco Petrini and Konstantinos Gkoumas : School of Engineering, Sapienza Universita di Roma, Via Eudossiana 18, Rome, Italy Wensong Zhou and Hui Li : School of Civil Engineering, Harbin Institute of Technology, 202 Haihe Road, Nan\'gang District, Harbin 150090, China

  • Modeling of non-isothermal CO2 particle leaked from pressurized source: I. Behavior of single bubble
    Daejun Chang, Sang Heon Han and Kyung-won Yang
    Abstract; Full Text (1430K)

Abstract
This study investigated the behavior of a non-isothermal CO2 bubble formed through a leak process from a high-pressure source in a deep sea. Isenthalpic interpretation was employed to predict the state of the bubble just after the leak. Three modes of mass loss from the rising bubble were demonstrated: dissolution induced by mass transfer, condensation by heat transfer and phase separation by pressure decrease. A graphical interpretation of the last mode was provided in the pressure-enthalpy diagram. A threshold pressure (17.12 bar) was identified below which the last mode was no longer present. The second mode was as effective as the first for a bubble formed in deep water, leading to faster mass loss. To the contrary, only the first mode was active for a bubble formed in a shallow region. The third mode was insignificant for all cases.

Key Words
CO2; bubble; depletion; dissolution; condensation; isenthalpic expansion

Address
Daejun Chang and Sang Heon Han : Division of Ocean Systems Engineering, Korea Advanced Institute of Science and Technology, Daejeon,Republic of Korea Kyung-won Yang : Det Norske Veritas Korea, Busan, Republic of Korea

  • Modeling of non-isothermal CO2 particle leaked from pressurized source: II. Behavior of single droplet
    Daejun Chang, Sang Heon Han and Kyung-won Yang
    Abstract; Full Text (1474K)

Abstract
This study revealed the behavior of droplets formed through leak process in deep water. There was a threshold depth named the universal attraction depth (UAD). Droplets rose upward in the zone below the UAD called the rising zone, and settled down in the zone above the UAD called the settling zone. Three mass loss modes were identified and formulated: dissolution induced by mass transfer, condensation by heat transfer and phase separation by pressure decrease. The first two were active for the settling zone, and all the three were effective for the rising zone. In consequence, the life time of the droplets in the rising zone was far shorter than that of the droplets in the settling zone.

Key Words
CO2; droplet; depletion; universal attraction depth (UAD); dissolution; condensation; isenthalpic expansion

Address
Daejun Chang and Sang Heon Han : Division of Ocean Systems Engineering, Korea Advanced Institute of Science and Technology, Daejeon,Republic of Korea Kyung-won Yang : Det Norske Veritas Korea, Busan, Republic of Korea

  • Integrated engineering environment for the process FEED of offshore oil and gas production plants
    Ji-Hyun Hwang, Myung-Il Roh and Kyu-Yeul Lee
    Abstract; Full Text (3546K)

Abstract
In this paper, an offshore process front end engineering design (FEED) method is systematically introduced and reviewed to enable efficient offshore oil and gas production plant engineering. An integrated process engineering environment is also presented for the topside systems of a liquefied natural gas floating production, storage, and offloading (LNG FPSO) unit, based on the concepts and procedures for the process FEED of general offshore production plants. Various activities of the general process FEED scheme are first summarized, and then the offshore process FEED method, which is applicable to all types of offshore oil and gas production plants, is presented. The integrated process engineering environment is presented according to the aforementioned FEED method. Finally, the offshore process FEED method is applied to the topside systems of an LNG FPSO in order to verify the validity and applicability of the FEED method.

Key Words
offshore process FEED; integrated process engineering environment; topside systems; offshore oil and gas production plants; LNG FPSO; offshore projects

Address
Ji-Hyun Hwang : Department of Naval Architecture and Ocean Engineering, Seoul National University, Shinlim-Dong, Seoul, 151-742, Korea Myung-Il Roh : School of Naval Architecture and Ocean Engineering, University of Ulsan, Mugeo-Dong, Nam-gu, Ulsan, 680-749, Korea Kyu-Yeul Lee: Department of Naval Architecture and Ocean Engineering, Research Institute of Marine Systems Engineering, Seoul National University, Shinlim-Dong, Seoul, 151-742, Korea,

  • Reducing hydroelastic response of very large floating structures by altering their plan shapes
    Z.Y. Tay and C.M. Wang
    Abstract; Full Text (3233K)

Abstract
Presented herein is a study on reducing the hydroelastic response of very large floating structures (VLFS) by altering their plan shapes. Two different categories of VLFS geometries are considered. The first category comprises longish VLFSs with different fore/aft end shapes but keeping their aspect ratios constant. The second category comprises various polygonal VLFS plan shapes that are confined within a square boundary or a circle. For the hydroelastic analysis, the water is modeled as an ideal fluid and its motion is assumed to be irrotational so that a velocity potential exists. The VLFS is modeled as a plate by adopting the Mindlin plate theory. The VLFS is assumed to be placed in a channel or river so that only the head sea condition is considered. The results show that the hydroleastic response of the VLFS could be significantly reduced by altering its plan shape.

Key Words
very large floating structure (VLFS); geometries; arbitrary shapes; mitigation methods; hydroelastic response

Address
Z.Y. Tay and C.M. Wang : Department of Civil and Environmental Engineering, National University of Singapore, Kent Ridge, Singapore, 119260

Table of Contents
       
 
  • 2017  Volume 7      No. 1  
     
  • 2016  Volume 6      No. 1      No.2    No.3    No.4
     
  • 2015  Volume 5      No. 1      No.2    No.3    No.4
     
  • 2014  Volume 4      No. 1      No.2    No.3    No.4
     
  • 2013  Volume 3      No. 1      No.2    No.3    No.4
     
  • 2012  Volume 2      No. 1      No.2    No.3    No.4
     
  • 2011  Volume 1      No. 1      No.2    No.3    No.4
           
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