Article
Engineering, Marine
Yihua Liu, Jingyan Zhang, Bo Tu
Summary: This study proposes an algorithm that considers ship dimensions and geometric position to calculate ship-bridge collision risk. An active warning strategy is also proposed based on this algorithm. The results show that the algorithm accurately predicts collision risk, thus improving the accuracy of the warning system.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Marine
Zeping Wang, Chunyu Guo, Chao Wang, Gang Chen, Ying Xu, Qing Li
Summary: This paper studies the damage deformation of ship side structures in oblique collision scenarios and proposes a simplified analysis method to predict the structural response, which has been validated for accuracy and can be used to assess the crashworthiness of ship side structures.
SHIPS AND OFFSHORE STRUCTURES
(2023)
Article
Engineering, Marine
Jin Pan, Tao Wang, Shi Wen Huang, Ming Cai Xu
Summary: The purpose of this paper is to find empirical formulae for the crushing force of a ship's rake bow, which can be used in the reliability analysis of bridges against ship collisions. A reduced ship rake bow was tested to study collapse behavior and mechanical characteristics, and used to calibrate a finite element model. The folding deformation and crushing force-displacement curves were analyzed in detail. The existing intersection unit method for assessing the collapse force of ship bows using rigid plastic theory was found to underestimate the crushing force for ship rake bows. Therefore, the existing empirical analytical formulae were modified based on numerical results of trapezoidal cylinders under axial crushing.
Article
Engineering, Marine
Lei Liu, Mingyang Zhang, Yue Hu, Wei Zhu, Sheng Xu, Qing Yu
Summary: This paper develops a probabilistic analytics method to evaluate the ship-buoy contact risk and identify the striking ship. It combines buoy domain and bounding box models and utilizes AIS data and navigational buoy data. The method determines the safety boundary of the buoy and analyzes the interaction between ship and buoy bounding boxes to identify the real striking ship.
Article
Engineering, Marine
Weijian Qiu, Kun Liu, Hewei Liu, Shuai Zong, Jiaxia Wang, Zhenguo Gao
Summary: This paper proposes a novel method that combines orthogonal testing with a backpropagation neural network (BPNN) to establish an efficient surrogate model for collision optimization in ship structures under various working conditions. The technique for order preference by similarity to ideal solution (TOPSIS) is introduced to formulate a multi-working condition optimization function. The crashworthiness of the ship structure is optimized using the sparrow search algorithm (SSA) while considering the constraint of lightweight design. The results show a substantial reduction in the objective functions and the BPNN predicted values are in good agreement with the finite element simulation results, verifying the effectiveness of the proposed method in improving ship structure crashworthiness and providing valuable guidance for engineering design.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Marine
Zeping Wang, Kun Liu, Gang Chen, Zhiqiang Hu
Summary: With the development of the shipping industry, the number of ships at sea has increased significantly. While oblique ship collisions are more frequent than head-on collisions, there is less research on oblique collisions. The study investigates six typical oblique collision scenarios through numerical simulations and proposes a simplified analytical method for predicting the structural response of ship side structures.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART M-JOURNAL OF ENGINEERING FOR THE MARITIME ENVIRONMENT
(2021)
Article
Engineering, Marine
Jean-Philippe Pineau, Fabien Conti, Herve Le Sourne, Thibaut Looten
Summary: This paper presents a numerical tool for rapid assessment of damage in ship grounding accidents. The study shows that increasing outer shell thickness or material grade can significantly reduce damage in bottom impacts, while structural reinforcement is less effective in side impacts.
Article
Engineering, Marine
Wei Cai, Ling Zhu, Ove T. Gudmestad, Kailing Guo
Summary: The paper introduces a method of applying the rigid-plastic theory to ship-ice collision and predicting plastic damage caused by energy dissipation during ice impact. The analytical results show good correlations with experimental and numerical results, accurately predicting maximal collision forces and plastic deformations of ship plates.
Article
Engineering, Marine
Chatchawan Aumtab, Thanapat Wanichanon
Summary: The stability and tracking controls of a dynamic ship system are investigated in this study for stabilizing and tracking the desired path of a catamaran ship system. A method is proposed for controlling the trajectory and stabilizing the ship system using the fundamental equations of constrained motion (FECM) with an uncertainty control. The results demonstrate the effectiveness of the control forces from FECM with an uncertainty controller in ensuring the satisfactory conditions and desired path following of the ship system.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Proceedings Paper
Engineering, Marine
Jie Chen, Bin Liu, R. Villavicencio, Jian Ji, C. Guedes Soares
Summary: This paper elaborates on the impact characteristics of double hull structures in various ship types and evaluates their crashworthiness through modeling and calculations with LS-DYNA. The study discusses the importance of analyzing structural characteristics for designing crashworthy structures.
PROCEEDINGS OF ASME 2021 40TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING (OMAE2021), VOL 2
(2021)
Article
Materials Science, Multidisciplinary
Burak Can Cerik, Joonmo Choung
Summary: This study investigated the effects of strain rate and thermal softening on large-scale ductile fracture in ship collisions using a rate-dependent model, considering hardening model, flow rule, and internal temperature variable, as well as non-proportional loading paths and failure modes. The analysis assessed the impact of loading rate and energy on the global behavior of the structure in a large-scale ship collision scenario involving struck ship/offshore installation and supply vessel.
Article
Engineering, Marine
Hong Lin, Chang Han, Lei Yang, Hassan Karampour, Haochen Luan, Pingping Han, Hao Xu, Shuo Zhang
Summary: This paper investigates the dynamic performance and crushing resistance of honeycomb reinforced structures in platforms under ship collision. The numerical simulation analysis shows that the hexagonal honeycomb structure provides better anti-collision capacity and offers improved protection for the platform pipe legs.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Marine
Jiayou Zhou, Yanjie Zhao, Yichi Zhang, Lunping Zhang, Yuchao Yuan, Wenyong Tang
Summary: This paper proposes a new analytical method to predict the crushing resistance of the deck and bulkhead under head-on and oblique collision scenarios. The results show that the method is in good agreement with the numerical results and has high application significance for damage assessment.
Article
Engineering, Marine
Chunhao Jiang, Lin Lin, Nian-Zhong Chen
Summary: A novel type of side structure for enhancing the crashworthiness of double-hull vessels is proposed based on auxetic materials. Numerical simulation demonstrates the resistance to collision of three different unit cells. A comparative study shows that the proposed side structures have superior energy absorption and collision resistance compared to traditional side structures.
Article
Engineering, Marine
Min Zhang, Xuxin Liao, Shilong Li, Shaoyun Song, Jingxi Liu, Zhiqiang Hu
Summary: Experimental and numerical simulation studies were conducted on a scaled ship side-shell to investigate its damage characteristics from deformation to a large opening caused by a raked bow indenter. The results of the experiments and numerical simulations showed good agreement in terms of resistance-penetration curves, final damage shapes, and three failure models. The energy dissipation and failure characteristics of the specimen were analyzed, revealing the substantial energy dissipation during crack propagation and the tension and bending effects on the shell elements prior to fracture.
Article
Engineering, Marine
Dong Hun Lee, Jeom Kee Paik
Summary: This paper investigates the ultimate strength characteristics of as-built ultra-large containership hull structures under combined vertical bending and torsional moments using the intelligent supersize finite element method (ISFEM). The study analyzes three containerships of varying sizes and formulates ultimate strength interaction relationships for containership hull girders. Insights and structural design recommendations obtained from the study will not only enhance the ultimate limit state capacity of containership hull structures in existing sizes but also achieve the robust structural design of ultra-larger containerships.
SHIPS AND OFFSHORE STRUCTURES
(2021)
Article
Engineering, Marine
Jeom Kee Paik, Jae Hyeong Park
Summary: This study investigates the crashworthiness of a floating offshore nuclear power plant hull structure in an aircraft strike, analyzing the impact of ballasting materials and penetration of the striking body. LS-DYNA nonlinear finite-element method is used for structural crashworthiness analysis, resulting in valuable insights for future research and design improvements.
SHIPS AND OFFSHORE STRUCTURES
(2021)
Article
Engineering, Marine
Fabien Conti, Herve Le Sourne, Dracos Vassalos, Pentti Kujala, Daniel Lindroth, Sang Jin Kim, Spyros Hirdaris
Summary: The paper discusses a method to account for collision-based crashworthiness on ship damage distributions, showing that damage reduction can be quantified through statistical analysis and simulation of collision scenarios. It is demonstrated that adding a double hull or reinforcing the deck can reduce damage, with the conclusion that installing a double hull on vulnerable ship zones leads to increased A-index.
SHIPS AND OFFSHORE STRUCTURES
(2022)
Article
Engineering, Marine
Sang Jin Kim, Jung Min Sohn, Pentti Kujala, Spyros Hirdaris
Summary: The paper presents a unified FSI model for ship crashworthiness assessment following ship hard grounding, utilizing spring elements for hydrostatic restoring forces in 3 DoF and distributing added masses in 6 DoF at nodal points in way of contact. Comparison with a previous method shows excellent idealization of ship dynamics. The findings suggest that this method could be valuable for rapid evaluation of ship grounding scenarios and regulatory advancements.
JOURNAL OF MARINE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Marine
Sang Jin Kim, Ghalib Taimuri, Pentti Kujala, Fabien Conti, Herve Le Sourne, Jean-Philippe Pineau, Thibaut Looten, Hongseok Bae, M. P. Mujeeb-Ahmed, Dracos Vassalos, Levent Kaydihan, Spyros Hirdaris
Summary: The dynamic response of ships following grounding and collision accidents may be influenced by structural topology, operational and environmental conditions. Computational methods offer a useful alternative in accurately capturing crushing mechanisms with consideration of hydrodynamic influences. Simulations for typical accident scenarios confirm the importance of hydrodynamic restoring forces and the sensitivity of damaged area to the failure strain values in grounding scenarios.
Article
Engineering, Marine
Sung-In Park, Jeom Kee Paik
Summary: This paper develops a hybrid method for designing the safety zone during truck-to-ship LNG bunkering and demonstrates its applicability through an example. This method contributes to the safety engineering of LNG bunkering.
Article
Engineering, Marine
Kunhou He, Hyeong Jin Kim, Giles Thomas, Jeom Kee Paik
Summary: This study extends previous research on the progressive collapse of steel stiffened-plate structures in fire events and applies computational models to analyze the heat transfer and fire-induced collapse behavior of ship-shaped offshore installation structures. The study also contributes to the industry by developing a practical procedure for ensuring the fire safety of large-scale steel-plated structures with complex geometries.
SHIPS AND OFFSHORE STRUCTURES
(2023)
Article
Engineering, Marine
Jung Min Sohn, Spyros Hirdaris, Jani Romanoff, Sang Jin Kim
Summary: This paper investigates the collapse behavior of submarine hulls under hydrostatic pressure loads and proposes a computational modeling approach. The accuracy of the numerical model is validated by comparing with experimental data. The effects of different material models and ply sequence parameters on collapse strength are examined, and the applicability of existing design codes is evaluated.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Mechanical
Ghalib Taimuri, Sang Jin Kim, Tommi Mikkola, Spyros Hirdaris
Summary: The assessment of structural crashworthiness following ship grounding events should consider the influence of multi-physics on dynamic response. This paper presents a rapid six degree of freedom (6-DoF) two-way coupled fluid-structure interaction (FSI) model that could be used for the rapid evaluation of ship dynamic response and structural crashworthiness during hard grounding events. The model is numerically validated and shown to be effective.
JOURNAL OF FLUIDS AND STRUCTURES
(2022)
Article
Engineering, Marine
Hyun Ho Lee, Hyeong Jin Kim, Jeom Kee Paik
Summary: This paper discusses the use of physical testing data to predict the ultimate compressive strength of steel stiffened panels, and introduces existing empirical formulae. Through research on advanced testing data of modern materials and fabrication technologies, the compatibility between these data and established formulae is determined.
SHIPS AND OFFSHORE STRUCTURES
(2023)
Article
Engineering, Marine
Hye Rim Cho, Hyeong Jin Kim, Sang Min Park, Dae Kyeom Park, Soon Hwan Yun, Jeom Kee Paik
Summary: The effect of solid rubber fenders on the structural damage caused by collisions between ship-shaped offshore installations and offshore supply vessels was investigated. A computational modeling technique was developed to simulate the kinetic energy absorption behavior of the rubber fenders. Physical crushing testing was performed to validate the computational model. The findings of the study provide insights into the collision energy absorption characteristics and structural damage when using rubber fenders in ship-ship collisions.
SHIPS AND OFFSHORE STRUCTURES
(2023)
Article
Engineering, Marine
Sang Min Park, Hyeong Jin Kim, Hye Rim Cho, Kyoung Hwan Kong, Dae Kyeom Park, Jeom Kee Paik
Summary: This study investigated the effects of pneumatic fenders on preventing structural damage from collisions between a ship-shaped offshore installation and a shuttle tanker. A nonlinear finite element modeling technique was developed to simulate the kinetic energy absorption behavior of the fenders. Physical tests were conducted to validate the computational model at various collision speeds. The integrated computational model was used to examine case studies and summarize the collision energy absorption characteristics.
SHIPS AND OFFSHORE STRUCTURES
(2023)
Article
Engineering, Marine
Jeong Hwan Kim, Seon Jin Kim, Dae Yu Baeg, Hyun Ho Lee, Jung Kwan Seo, Jeom Kee Paik
Summary: This paper presents a method for assessing and managing fire risks on the flight deck of aircraft carriers. Realistic fire scenarios are selected and taken into account operational and ocean environmental conditions to establish fire exceedance diagrams associated with fire-impacted areas.
SHIPS AND OFFSHORE STRUCTURES
(2023)
Editorial Material
Engineering, Marine
Sang Jin Kim
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Mechanics
Haris Nubli, Jung Min Sohn, Sangjin Kim
Summary: This study optimizes the cryogenic spill protection in the bunkering process of LNG-fueled ships using finite element (FE) analysis combined with computational fluid dynamics (CFD) modeling. A machine learning method, particularly decision tree learning and random forest techniques, is employed to accurately determine the temperature load profile and provide an effective platform for transferring the load profile.
CURVED AND LAYERED STRUCTURES
(2023)