https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/129 2026-05-03T19:08:54Z 2026-05-03T19:08:54Z Bravo, Cristobal Santiago Hong, Seok Won Nam, Bo Woo https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9554 2024-01-09T13:31:24Z 2021-06-01T00:00:00Z

Title: An Investigation of the Performance of a Pusher-Barge System Considering Advancing Velocity in Regular Waves Authors: Bravo, Cristobal Santiago; Hong, Seok Won; Nam, Bo Woo Abstract: This study investigates the performance of a pusher-barge system advancing in regular waves. The numerical simulation is carried out through the implementation of an in-house code, "AdFlow" (Advanced Analysis System for Floating Bodies in Waves), for the evaluation of first-order hydrodynamic properties. AdFlow allows the numerical analysis of motion responses by solving the potential flow around multi-bodies using a higher-order boundary element method (HOBEM) and wave Green function in the frequency domain. In this investigation, a pusher tug is arranged and located at the stern notch of a barge in a linear combination, connected with a well-proven coupling system. The study considers a coupling system configuration for the pusher-barge system using a connection pin, which allows the system to work as a single unit. The chosen connection pin system allows an independent pitch motion, while roll and yaw motions remain coupled. This research analyzed the advancing velocity condition for the pusher-barge system by considering three different heading angles in deep water. Moreover, this study evaluates six-degrees-of-freedom motion and calculates loads and moments acting on the connecting pin for different wave periods. Finally, this study compares and discusses response amplitude operators.

2021-06-01T00:00:00Z Hong, Sa Young Nam, Bo Woo Ha, Yoon-Jin Hong, Seok Won https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/472 2024-01-09T10:30:38Z 2018-03-01T00:00:00Z

Title: Fully Coupled Analysis of an Offshore Deck Mating Operation of a Large Topside Module Authors: Hong, Sa Young; Nam, Bo Woo; Ha, Yoon-Jin; Hong, Seok Won Abstract: A fully coupled analysis is carried out to evaluate the offshore mating operation for a large heavy topside module on a deck of floating liquefied natural gas (FLNG). Fully coupled hydrodynamic interactions are considered between a crane vessel lifting the heavy topside module and the FLNG. Multiple crane wires and slings are modeled with linear springs, while the leg mating unit (LMU) guide is modeled with bilinear springs. Special attention is paid to the accurate prediction of coupled hydrodynamic coefficients and pendulum dynamics of heavy hanging objects. Simulation results are validated by comparing model test results on key parameters affecting the deck mating operations on-site. Good agreement has been obtained between the simulations and the model tests.

2018-03-01T00:00:00Z Bravo, C.S. Hong, S.W. Nam, B.W. https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8431 2024-01-09T10:30:48Z 2018-01-01T00:00:00Z

Title: An investigation on the performance of a pusher-barge system in regular waves Authors: Bravo, C.S.; Hong, S.W.; Nam, B.W. Abstract: This paper aims to investigate the performance of a pusher-barge system in regular waves. The numerical simulation is carried out through the implementation of an in-house code for the evaluation of the first-order (linear) hydrodynamic properties. For the potential flow problem around the pusher-barge system, a higher-order boundary element method (HOBEM) with wave green function in frequency domain is implemented. For the pusher-barge system, six degrees-of-freedom (6DOF) motion are evaluated and discussed for three different heading angles in deep water conditions. In this study, a pusher tug is arranged and located at the stern notch of the barge in a linear combination connected with a well-proven coupling system. The coupling system configuration for the pusher-barge system using a connection pin is considered, allowing the system to work as a single unit. The chosen connection pin system allows an independent pitch motion while roll and yaw angular motions remain coupled. Furthermore, loads on the connecting pins are calculated for different wave periods. Finally, Response Amplitude Operators (RAOs) are compared and discussed. Copyright ？ 2018 by the International Society of Offshore and Polar Engineers

2018-01-01T00:00:00Z 이강수 홍석원 https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8045 2024-01-09T09:30:48Z 2017-12-31T00:00:00Z

Title: 부유식 해상풍력발전시스템의 해양공학기술 현황 및 발전방향 Authors: 이강수; 홍석원 Abstract: Floating offshore wind power system are being actively developed around the world. The key point of the development is the integration of traditional wind turbine technique and related marine engineering technologies such as environmental condition of installation site, location, floating structure, mooring system, outfitting, electrical and machinery equipment. Internationally, marine engineering companies in Europe and Japan are leading the development of related technologies and on-site demonstration. Since the related companies are leading the development, it has high technological advances and market potential which can lead to early commercialization. Marine engineering takes an important role, at least 50%, in the development of floating wind power generation technology. Most of floating structures such as semi-submersible, TLP(tension-leg platform), SPAR are typical oil drilling platform. In case of Korea, there is an opportunity to pioneer and occupy the future market since related industries such as design engineering business, plant production, mooring equipment, transportation and installation engineering business are led by not only small but also major companies. Furthermore, possibility of large scale development in deep sea area and possibility to improve economic efficiency by utilizing very large structures exist. Lastly securing relevant technologies for commercialization and industrialization is n

2017-12-31T00:00:00Z