Ikjae Lee
Research Subjects
Ikjae Lee has a total of 22 co-authors. Here are the top co-authors by number of shared publications:
- Chungkuk Jin
Department of Ocean Engineering and Marine Sciences, Florida Institute of Technology, Melbourne, FL 32901, USA
5 shared publications - MooHyun Kim
Department of Ocean Engineering, Texas A&M University, College Station, TX, USA
4 shared publications - JeongYong Park
Department of Ocean Engineering, Texas A&M University, Haynes Engineering Building, 727 Ross Street, College Station, TX 77843, USA
2 shared publications MooHyun Kim
2 shared publications- Sung-Jae Kim
Fisheries Engineering Division, National Institute of Fisheries Science, Busan 46083, Republic of Korea
2 shared publications Alex Ran
1 shared publication
Latest Publications
- Open Access
- 11 April 2026
- Published by Elsevier in Marine Structures
- Vol. 109
Seaquake loads by a hybrid integral-equation method for dynamic analyses of floating offshore wind turbines under seabed earthquakes
- 11 April 2026
- Published by Elsevier in Marine Structures
- Vol. 109
Open AccessSeaquake loads by a hybrid integral-equation method for dynamic analyses of floating offshore wind turbines under seabed earthquakes
- 30 December 2025
- Published by Elsevier in Ocean Engineering
- Vol. 348
Dynamic loads and responses under solitary/tsunami wave by variable-fidelity numerical models
- 30 December 2025
- Published by Elsevier in Ocean Engineering
- Vol. 348
Dynamic loads and responses under solitary/tsunami wave by variable-fidelity numerical models
- Open Access
- 7 November 2025
- Published by Elsevier in Applied Ocean Research
- Vol. 165
Automatic Mooring-Line-Failure Detection Using Hull Motion Sensors and Machine Learning (ML) for 15MW Floating Offshore Wind Turbines (FOWTs)
- 7 November 2025
- Published by Elsevier in Applied Ocean Research
- Vol. 165
Open AccessAutomatic Mooring-Line-Failure Detection Using Hull Motion Sensors and Machine Learning (ML) for 15MW Floating Offshore Wind Turbines (FOWTs)
- Open Access
- 24 October 2025
- Published by Elsevier in Ocean Engineering
- Vol. 343
Experimental and numerical investigation on the dynamic response of a 15 MW semisubmersible floating offshore wind turbine including 1-mooring line failure scenario
- 24 October 2025
- Published by Elsevier in Ocean Engineering
- Vol. 343
Open AccessExperimental and numerical investigation on the dynamic response of a 15 MW semisubmersible floating offshore wind turbine including 1-mooring line failure scenario
- 30 January 2025
- Published by Elsevier in Engineering Structures
- Vol. 329
Multi-body-based 2D hydro-elasticity simulations in time domain for moored floating structure
- 30 January 2025
- Published by Elsevier in Engineering Structures
- Vol. 329
Multi-body-based 2D hydro-elasticity simulations in time domain for moored floating structure
- Open Access
- 4 January 2025
- Published by MDPI AG in Journal of Marine Science and Engineering
- Vol. 13 (1) , 77
On the Static Stability and Seakeeping Performance of a Submerged Floating Tunnel Module in Wet Tow
A case study is conducted for a submerged floating tunnel module (SFTM) in wet tow conditions. Inspired by the successful wet tow operations of spar platforms, a wet tow scenario is examined where a tunnel module, floating horizontally with a half-diameter draft, is towed by tugboats using towlines. To evaluate the static stability of the SFTM during wet tow, numerical static offset tests are performed at varying tow speeds to determine the equivalent system stiffness. These static offset tests consider surge, sway, roll, and yaw motions. Statistical analyses are subsequently performed based on the encounter-frequency approximation with varying equivalent stiffnesses. The most probable extreme motion analysis for 3 h under sea state 4 ( and ) shows that the beam sea condition causes the largest heave (0.6 m), and the stern sea (30 deg.) leads to the largest yaw response (0.85 deg.), which is likely to cause an instantaneous decrease in towing stability.- 4 January 2025
- Published by MDPI AG in Journal of Marine Science and Engineering
- Vol. 13 (1) , 77
Open AccessOn the Static Stability and Seakeeping Performance of a Submerged Floating Tunnel Module in Wet Tow
A case study is conducted for a submerged floating tunnel module (SFTM) in wet tow conditions. Inspired by the successful wet tow operations of spar platforms, a wet tow scenario is examined where a tunnel module, floating horizontally with a half-diameter draft, is towed by tugboats using towlines. To evaluate the static stability of the SFTM during wet tow, numerical static offset tests are performed at varying tow speeds to determine the equivalent system stiffness. These static offset tests consider surge, sway, roll, and yaw motions. Statistical analyses are subsequently performed based on the encounter-frequency approximation with varying equivalent stiffnesses. The most probable extreme motion analysis for 3 h under sea state 4 ( and ) shows that the beam sea condition causes the largest heave (0.6 m), and the stern sea (30 deg.) leads to the largest yaw response (0.85 deg.), which is likely to cause an instantaneous decrease in towing stability. - 25 November 2024
- Published by Elsevier in Marine Structures
- Vol. 100, 103724
Impact of hull flexibility on the global performance of a 15 MW concrete-spar floating offshore wind turbine
- 25 November 2024
- Published by Elsevier in Marine Structures
- Vol. 100, 103724
Impact of hull flexibility on the global performance of a 15 MW concrete-spar floating offshore wind turbine
- Open Access
- 31 December 2023
- Published by The Korean Society of Ocean Engineers in Journal of Ocean Engineering and Technology
- Vol. 37 (6) , 238-246
Dynamic Behavior Assessment of OC4 Semi-submersible FOWT Platform Through Morison Equation
This paper proposes an effective inertia coefficient (EIC) in the Morison equation for better wave-force calculations. The OC4 semi-submersible floating offshore wind turbine (FOWT) platform was considered to test the feasibility. Large diffraction at large Keulegan– Carpenter (KC) numbers and the interaction between columns can result in errors in estimating the wave force using the Morison equation with a theoretical inertia coefficient, which can be corrected by the EIC as a function of the wave period and direction. The horizontal and vertical wave forces were calculated using the Morison equation and potential theory at each column, wave period, and wave direction. The EICs of each column were then obtained, resulting in a minimal difference between the Morison inertia force and the wave excitation force by the potential theory. The EICs, wave forces, phase angles, and dynamic motions were compared to confirm the feasibility of an EIC concept under regular and random waves.
- 31 December 2023
- Published by The Korean Society of Ocean Engineers in Journal of Ocean Engineering and Technology
- Vol. 37 (6) , 238-246
Open AccessDynamic Behavior Assessment of OC4 Semi-submersible FOWT Platform Through Morison Equation
This paper proposes an effective inertia coefficient (EIC) in the Morison equation for better wave-force calculations. The OC4 semi-submersible floating offshore wind turbine (FOWT) platform was considered to test the feasibility. Large diffraction at large Keulegan– Carpenter (KC) numbers and the interaction between columns can result in errors in estimating the wave force using the Morison equation with a theoretical inertia coefficient, which can be corrected by the EIC as a function of the wave period and direction. The horizontal and vertical wave forces were calculated using the Morison equation and potential theory at each column, wave period, and wave direction. The EICs of each column were then obtained, resulting in a minimal difference between the Morison inertia force and the wave excitation force by the potential theory. The EICs, wave forces, phase angles, and dynamic motions were compared to confirm the feasibility of an EIC concept under regular and random waves.
- Open Access
- 28 February 2019
- Published by The Korean Society of Ocean Engineers in Journal of Ocean Engineering and Technology
- Vol. 33 (1) , 17-25
Pseudo Mapping Method for Singular Integral of Curved Panels
A numerical method is suggested for evaluating the singular integral of curved panels in the higher-order boundary element method. Two-step mapping procedures that are significantly related to the physical properties of singular behaviors were developed and illustrated. As a result, the singular behaviors were significantly alleviated, and the efficiency and robustness of the present method for tangentially and axially deformed elements were proven. However, inaccuracies and numerical instabilities of twisted elements were discovered as a result of nonlinearities.
- 28 February 2019
- Published by The Korean Society of Ocean Engineers in Journal of Ocean Engineering and Technology
- Vol. 33 (1) , 17-25
Open AccessPseudo Mapping Method for Singular Integral of Curved Panels
A numerical method is suggested for evaluating the singular integral of curved panels in the higher-order boundary element method. Two-step mapping procedures that are significantly related to the physical properties of singular behaviors were developed and illustrated. As a result, the singular behaviors were significantly alleviated, and the efficiency and robustness of the present method for tangentially and axially deformed elements were proven. However, inaccuracies and numerical instabilities of twisted elements were discovered as a result of nonlinearities.