https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/116 Sun, 03 May 2026 14:32:29 GMT 2026-05-03T14:32:29Z https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9515 Title: A Concept Study on Design Alternatives for Minimizing Accident Consequences in Maritime Autonomous Surface Ships Authors: Lee, Gyeong Joong; Lee, Dongkon; Choi, Jin; Kang, Hee Jin Abstract: Autonomous ships, also known as maritime autonomous surface ships (MASS), are vessels that use artificial intelligence and robotics technologies to navigate independently. Due to their advanced technological capabilities, MASS is expected to play a significant role in the future of the shipping industry. The International Maritime Organization (IMO) is currently developing international standards for MASS classification, including accident avoidance technologies. However, the issue of how to mitigate the consequences of accidents involving autonomous ships has not been sufficiently addressed. Therefore, this study focuses on alternative design solutions and emergency response systems for MASS to properly control emergency situations and minimize the impact of accidents, such as flooding and fire on board. The goal is to efficiently address such accidents, especially in situations where the number of people on board is significantly reduced or the ship is being operated automatically or remotely, and to promptly detect and respond to such situations from a remote location. This paper investigates the possibility of modifying the design of the air conditioning system to delay flooding by considering a reduction in the number of crew members in order to prevent flooding. To prevent the spread of fire, the study examines early blockage measures for areas where air can enter. Flood and fire response systems were configured to be executed manually or automatically based on the results of presimulated scenarios defined in thousands of accident scenarios. Each accident propagation and response situation proposes an alternative using a coded shortcut key utilizing graphic symbols of international standard ISO 23120. Sat, 01 Apr 2023 00:00:00 GMT https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9515 2023-04-01T00:00:00Z https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9621 Title: Air Pressure Scale Effects During Damage Model Tests Authors: Lee, G.J.; Reed, A.M.; van, Walree F.; Peters, A.; Gualeni, P.; Katayama, T.; Duan, W.Y. Abstract: The Stability in Waves committee of the 27th ITTC has investigated the significance of scale effects in air pressure on flooding model tests under atmospheric conditions. For this purpose, the committee classified the flooding cases into the trapped air case and vented air case and investigated the flooding process for a simple geometry, using the state equation of air and orifice equation. As a result, the committee concluded that the scale effect is large for the case of trapped air and small vent area. For the other cases, the effect is small and can therefore be neglected in the model test of a damaged ship. In addition, the committee proposed some directions that can be used to reduce the scale effect of air pressure. ？ 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG. Sun, 01 Jan 2023 00:00:00 GMT https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9621 2023-01-01T00:00:00Z https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9622 Title: The Inertia Contributions Due to Floodwater Mass Authors: Lee, G.J.; Reed, A.M.; van, Walree F.; Peters, A.; Gualeni, P.; Katayama, T.; Duan, W.Y. Abstract: The Stability in Waves committee of the 27th ITTC investigated how to deal with the inertia due to floodwater mass from three points of view: (1) floodwater domain, (2) floodwater inertia itself, (3) floodwater entering ship. The committee suggested three criteria indicating the concept of how to deal with floodwater and providing clues on what to consider as floodwater when examining damage ships: (1) whether the water is moving with the ship or not, and amount of that water, (2) whether there is a significant pressure jump across the compartment boundary or not, (3) whether the dynamics of water can be solved separately or not. For floodwater inertia, the committee divided this into the partially flooded case and fully flooded case, and investigated the properties and showed how to deal with floodwater inertia for each case. For the case of the floodwater entering ship, the treatment of inertia change due to floodwater was made clear using the momentum change principle. The related procedure was updated reflecting this work. ？ 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG. Sun, 01 Jan 2023 00:00:00 GMT https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9622 2023-01-01T00:00:00Z https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9291 Title: 선박 추진시스템 유동 소음원 상대적 기여도 분석 Authors: 하준범; 구가람; 정철웅; 설한신; 정홍석; 정민석 Abstract: 본 논문에서는 KVLCC2 선체 축소모형에 설치된 추진시스템의 세부 구성품별 유동 소음원을 분석하였으며, 각각의 소음원이 수중방사소음에 미치는 영향에 대해 정량적으로 분석하였다. 수치 해석 영역은 실험 결과와의 비교를 위하여 선박해양플랜트연구소 대형 캐비테이션 터널의 시험부와 동일하게 설정하였다. 먼저 유동장내 소음원을정확하게 모사하기 위하여 고정밀 해석기법인 비압축성 다상 Delayed Detached Eddy Simulation 방법을 적용하였고, 유동해석 결과를 기반으로 Ffowcs Williams and Hawkings 적분방정식을 사용하여 수중방사소음을 예측하였으며, 터널 실험결과와의 비교를 통해 해석절차의 유효성을 확인하였다. 추진시스템의 유동 소음원별 영향을 정량적으로 비교하기 위하여 추진기 날개 끝-와류 공동, 날개 표면 그리고 방향타 표면을 소음원 영역으로 선정하였으며, 음압과 파워 스펙트럼 밀도, 음향 파워를 비교하였다. 공동에 의한 홀극 소음원의 기여도가 추진기 날개 및 방향타에 의한쌍극 소음원에 비해 수중방사소음에 크게 기여하였으며, 추진기 후류의 영향으로 방향타에 의한 기여도가 추진기 보다 더 크게 발생함을 확인하였다. Sun, 01 May 2022 00:00:00 GMT https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9291 2022-05-01T00:00:00Z