A5022707132- Wave and Wind Energy Systems
- Fluid Dynamics Simulations and Interactions
- Ship Hydrodynamics and Maneuverability
- Spacecraft and Cryogenic Technologies
- Coastal and Marine Dynamics
- Engineering Applied Research
- Ocean Waves and Remote Sensing
- Marine and Offshore Engineering Studies
- Fluid Dynamics and Vibration Analysis
- Marine and Coastal Research
- Maritime Transport Emissions and Efficiency
- Structural Integrity and Reliability Analysis
- Vibration and Dynamic Analysis
- Underwater Vehicles and Communication Systems
- Wind and Air Flow Studies
- Offshore Engineering and Technologies
- Earthquake and Tsunami Effects
- Advanced Numerical Methods in Computational Mathematics
- Numerical methods in engineering
- Numerical methods in inverse problems
- Structural Health Monitoring Techniques
- Numerical methods for differential equations
- Maritime Navigation and Safety
- Oil Spill Detection and Mitigation
- Geotechnical Engineering and Underground Structures
Korea Research Institute of Ships and Ocean Engineering
2015-2024
Korean Register (South Korea)
2005-2024
Korea Institute of Ocean Science and Technology
2005-2024
Global Core Research Center for Ships and Offshore Plants
2016-2021
Pusan National University
2018
Korea University of Science and Technology
2017
Ministry of Employment and Labor
2012-2015
Chungnam National University
2010-2014
Samsung (South Korea)
2014
Seoul National University
1999-2013
In this study, we developed a numerical code utilizing the indirect boundary integral equation method (IBIEM) to analyze hydrodynamics of multiple floating bodies undergoing large plane displacement. Conventional methods, which apply conditions at mean position, fall short in accounting for hydrodynamic interactions arising from these relative displacements. To address this, our approach involves updating boundaries both free surface and bodies, necessitating reconstruction interpolation...
In this study, hydrodynamic characteristics and operational feasibility of a floating liquefied natural gas (LNG) bunkering terminal moored side-by-side with an LNG carrier two shuttles were investigated, during the transferring process. Experiments consisted configurations, namely soft spring moorings individually mooring system. Motion response amplitude operators (RAOs) wave drift force RAOs in regular waves measured from former configuration while latter was used to obtain global motion...
This paper is concerned with the determination of nonlinear roll damping moments ships including similar floating structures.Using measured motion response data ship's motion, an inverse problem formulated for determination.The mathematically involved in a Volterra integral equation "first" kind between responses and unknown damping.This first results numerical instability, that is, solutions lack stability property.A regularization method applied order to suppress instability.Any priori...
This paper presents the results of a numerical study on towing stability barges. Towing simulations were carried out by using two different models (MMG model and cross-flow model). Stability criteria are also suggested based analysis linearized governing equations for towed vessel motion. In order to validate present models, experimental data Yasukawa et al. (2006) used. Simulations conducted single double barges under constant speed direction conditions. The time histories heading angle,...
This paper discusses the optimal weathervaning control of a dynamic positioning (DP) vessel, where vessel is aligned toward an direction for zero resultant moment due to wind, wave, and current forces while maintaining fixed position. Specifically, nonlinear backstepping technique used design weather-optimal controller in task space. approach does not require direct measurement or estimation environmental forces, which allows simple effective system. Simulations experiments were conducted...
In this study, heading characteristics and control performances were evaluated to achieve the wave shield effect. The effect originating from reduces relative motions of moored vessels in a floating liquefied natural gas bunkering terminal (FLBT). Therefore, loading off-loading are improved through reduced motion. For objective study efficiency analysis, simplified model was used that assuming no motion FLBT. involved modeling environmental loads inertia several bodies, including FLBT, into...
This paper presents a numerical study of the wave loads acting on offshore structures using Cartesian-grid-based flow simulation method. Finite volume discretization with volume-of-fluid (VOF) method is adopted to solve two-phase Navier-Stokes equations. Among many variations VOF method, CICSAM scheme applied. The body boundary conditions are satisfied porosity function, and generation carried out by transient (wave or damping) zone approaches. In order validate present three different basic...
In recent years, LNG bunkering terminals are needed to supply as fuel meet the emission requirements of International Maritime Organization (IMO). A floating terminal (FLBT) is one most cost-effective and environmentally friendly systems for storing transferring it directly an vessel. The FLBT maintains its position using mooring such spread turret mooring. loads on vessel lines must be carefully determined maintain their positions within operable area. this study, wind acting in several...
In this study, the operability of an FLBT (floating LNG bunkering terminal) was evaluated experimentally. Model tests were conducted in KRISO (Korea Research Institute Ships and Ocean Engineering) ocean engineering basin. An FLBT, carrier, two shuttles moored side by with mooring ropes fenders. Two white-noise wave cases, one irregular case, various regular cases generated. The relative local motions between each loading arm its corresponding manifold initial design configuration calculated...
In order to guarantee asymptotic stability for mobile robot, proportional-integral-derivative (PID) controllers are needed. this paper, we use an uncoupled linear PID controller with explicit conditions control a in which semiglobal of the was proven. Explicit given choice gains controller, and assure closed-loop system. Experimental studies differential wheels robot addressed. The theoretical analysis presented work provides tool design implementation experimentally on real robots.
In this paper, a Rankine source method is applied and validated to analyze the hydrodynamic response of three-dimensional floating structure in frequency domain. The boundary value problems for radiation diffraction problem are solved by using desingularized indirect integral equation (DIBIEM). DIBIEM simpler faster than conventional methods based on numerical surface integration Green