International Journal of Naval Architecture and Ocean Engineering最新文献_第3页

Method for anti-collision path planning using velocity obstacle and A* algorithms for maritime autonomous surface ship 利用速度障碍和 A* 算法进行海上自主水面舰艇防碰撞路径规划的方法

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2024-01-01 DOI: 10.1016/j.ijnaoe.2024.100586

Donghun Yu , Myung-Il Roh

{"title":"Method for anti-collision path planning using velocity obstacle and A* algorithms for maritime autonomous surface ship","authors":"Donghun Yu , Myung-Il Roh","doi":"10.1016/j.ijnaoe.2024.100586","DOIUrl":"10.1016/j.ijnaoe.2024.100586","url":null,"abstract":"<div><p>With the increasing size of ships and increasing demand for autonomous navigation, ensuring ship safety is not the only concern; the efficiency of anti-collision technology should be enhanced. In this paper, we propose a novel hybrid anti-collision path planning method called VO-PATH. This method combines the advantages of the Velocity Obstacle (VO) algorithm, which guarantees anti-collision for autonomous ships, with the A* algorithm, which is known for its capacity to optimize paths. To assess the effectiveness of the proposed method, we conducted anti-collision simulations for both single- and multiple-encounter scenarios, all of which adhered to COLREGs-defined avoidance obligations. Furthermore, we evaluated the performance of the proposed method by comparing its results with those obtained using conventional VO and A* algorithms. The findings indicate that the proposed method is superior to the A* algorithm in terms of steering away from collisions in complex multiple-encounter scenarios. Additionally, the proposed method significantly reduces the distance traveled by the ship to avoid potential collisions, with improvements of up to approximately 6.6% compared with alternative algorithms. We expect that this reduction will enhance safety and provide a more efficient anti-collision path.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"16 ","pages":"Article 100586"},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2092678224000050/pdfft?md5=c4b71b1ddb3c2008785dc47e96c71e60&pid=1-s2.0-S2092678224000050-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139689261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the flooding characteristics of damaged barges with dynamic explosive deformation 受损驳船动态爆炸变形的淹没特性研究

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2024-01-01 DOI: 10.1016/j.ijnaoe.2024.100589

Hongtao Hu , Xiaobin Li , Caineng Wang , Changkyu Rheem , Wei Chen

{"title":"Study on the flooding characteristics of damaged barges with dynamic explosive deformation","authors":"Hongtao Hu , Xiaobin Li , Caineng Wang , Changkyu Rheem , Wei Chen","doi":"10.1016/j.ijnaoe.2024.100589","DOIUrl":"10.1016/j.ijnaoe.2024.100589","url":null,"abstract":"<div><p>Dynamic explosion in a compartment damages the structure, resulting in flooding and even sinking of the ship. To study the flooding characteristics of damaged compartments and floating states of the hull under deformation of the bulkhead caused by explosion, the damage effects on a single compartment and multiple compartments under dynamic explosion are illustrated. Then, the flooding characteristics are analyzed for single compartment models with two types of damage modes and one multi-compartment asymmetric damage model. The results indicate that the deflection of the bulkhead increases the capacity of the compartment, resulting in variations in the flooding process of damaged compartments. Compared with the single models without deflection deformation, the final flooding quantity of the two types of models with deflection deformation increased by 62.49% and 65.48%. The difference in flooding characteristics led to deviation in the six-degree-of-freedom motion of the two types of hull models. Significantly, the amplitude of heave in the models with deflection deformation under the two types of asymmetric damage modes increased by 60% and 66% compared to that of the models without deflection deformation, and the pitch increased by 66% and 50%. Nevertheless, in the multi-compartment models, there were no distinct differences in the flooding process and six-degree-of-freedom motion. These results can support the rapid assessment of the unsinkability of ships in explosive environments.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"16 ","pages":"Article 100589"},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2092678224000086/pdfft?md5=bbe0f56bc72c4b63297c4a0f45b8518a&pid=1-s2.0-S2092678224000086-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140400775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Limit protection systems for safety operational envelope of submarine 潜艇安全运行包络线极限保护系统

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2024-01-01 DOI: 10.1016/j.ijnaoe.2024.100598

Jung-Hyeon Kim , Seonhong Kim , Jooho Lee , Jong-Yong Park

{"title":"Limit protection systems for safety operational envelope of submarine","authors":"Jung-Hyeon Kim , Seonhong Kim , Jooho Lee , Jong-Yong Park","doi":"10.1016/j.ijnaoe.2024.100598","DOIUrl":"10.1016/j.ijnaoe.2024.100598","url":null,"abstract":"<div><p>To enhance the operational stability of submarines, this study conducts a comparative analysis of three pitch limit protection systems based on the reference model, potential function, and dynamic trim algorithm. The proposed depth limit protection system adjusts the depth command by comparing the desired depth, calculated by the outer-loop controller, against a predefined depth limit. Similarly, the pitch limit protection systems modify the command pitch calculated by the inner-loop controller to ensure it does not exceed the pitch limit. Submarine maneuvering simulations were conducted to verify the performance of the envelope protection system, which comprises depth and pitch limit protection systems. Simulation results confirmed the effectiveness of these methods, with the dynamic trim algorithm demonstrating superior control efficiency. This study advances submarine safety and stability by developing and validating advanced pitch limit protection systems.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"16 ","pages":"Article 100598"},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2092678224000177/pdfft?md5=91d1d1d314999070361f7a1363c73d68&pid=1-s2.0-S2092678224000177-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141396459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel formula for predicting the ultimate compressive strength of the cylindrically curved plates 预测圆柱形曲面板极限抗压强度的新公式

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2024-01-01 DOI: 10.1016/j.ijnaoe.2023.100562

Do Kyun Kim , Andy Ming King Wong , Jinha Hwang , Shen Li , Nak-Kyun Cho

{"title":"A novel formula for predicting the ultimate compressive strength of the cylindrically curved plates","authors":"Do Kyun Kim , Andy Ming King Wong , Jinha Hwang , Shen Li , Nak-Kyun Cho","doi":"10.1016/j.ijnaoe.2023.100562","DOIUrl":"10.1016/j.ijnaoe.2023.100562","url":null,"abstract":"<div><p>\"The present study aims to develop an empirical formula to predict the ultimate compressive strength of unstiffened cylindrically curved plates. Drawing from an extensive analysis of 400 unique curved plate scenarios under longitudinal compression, we investigated critical parameters: the flank angle (denoted as <span><math><mrow><mi>θ</mi></mrow></math></span>), plate aspect ratio (denoted as <span><math><mrow><mi>a</mi><mo>/</mo><mi>b</mi></mrow></math></span>), and plate slenderness ratio (denoted as <span><math><mrow><mi>β</mi></mrow></math></span>). The ANSYS Nonlinear Finite Element Method (NLFEM) was employed to assess each scenario, considering the average level of initial imperfections (denoted as <span><math><mrow><mn>0.1</mn><msup><mi>β</mi><mn>2</mn></msup><mi>t</mi></mrow></math></span>) and configurations of one-bay and one-span. It is important to note that the models were designed without accounting for the effects of residual stresses. The simulation data generated from this analysis served as the foundation for developing our empirical formula. The proposed formula strongly agreed with the numerical simulations and experimental test results. This research provides structural engineers with a reliable predictive tool, aiding in more accurate predictions of the ultimate limit state (ULS) of curved plates during early design phases.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"16 ","pages":"Article 100562"},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2092678223000511/pdfft?md5=f196bc14dbb543391818cb3d27510092&pid=1-s2.0-S2092678223000511-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138690560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A numerical study of added resistance performance and hydrodynamics of KCS hull in oblique regular waves and estimation of resistance in short-crested irregular waves through spectral method 斜向规则波中 KCS 船体附加阻力性能和流体力学数值研究，以及通过频谱法估算短波不规则波中的阻力

IF 2.2 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2024-01-01 DOI: 10.1016/j.ijnaoe.2023.100563

Soon-Hyun Lee , Cheolho Kim , Kwang-Jun Paik , Hyeongjun Kim , Jangho Chun

{"title":"A numerical study of added resistance performance and hydrodynamics of KCS hull in oblique regular waves and estimation of resistance in short-crested irregular waves through spectral method","authors":"Soon-Hyun Lee , Cheolho Kim , Kwang-Jun Paik , Hyeongjun Kim , Jangho Chun","doi":"10.1016/j.ijnaoe.2023.100563","DOIUrl":"10.1016/j.ijnaoe.2023.100563","url":null,"abstract":"<div><p>Research on multidirectional waves is increasing as studies on added resistance advance. In this study, the added resistance of the multidirectional regular waves of the KCS hull was estimated by numerical analysis. The direction of the grid was changed according to the heading angle to consider waves in multiple directions. In addition, the method in which the entire domain moved along the movement of the hull was used without using the overset method to minimize the numerical errors. The added resistance and motion RAOs for each angle and the flow characteristics were compared to support the results. For fluid dynamics, time-averaged stern dynamics pressure, boundary layer, and nominal wake for each heading angle were compared, and differences compared to calm water were also reviewed. Based on the bow quartering sea condition analysis results, the added resistance in long-crested and short-crested irregular wave conditions was estimated using the spectral method. The JONSWAP spectrum was used as the target wave spectrum, and the cos-power type was considered the directional spreading function.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"16 ","pages":"Article 100563"},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2092678223000523/pdfft?md5=d01b2d2da20c74277564026183296442&pid=1-s2.0-S2092678223000523-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138690704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ship route planning for collision avoidance based on the improved isochrone method 基于改进等时线法的船舶避碰航线规划

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2024-01-01 DOI: 10.1016/j.ijnaoe.2024.100613

Jisang Ha , Myung-Il Roh , Hye-Won Lee

{"title":"Ship route planning for collision avoidance based on the improved isochrone method","authors":"Jisang Ha , Myung-Il Roh , Hye-Won Lee","doi":"10.1016/j.ijnaoe.2024.100613","DOIUrl":"10.1016/j.ijnaoe.2024.100613","url":null,"abstract":"<div><p>If ship navigators could access precise collision risk data and guidance for avoidance, safer navigation would be feasible. This study introduces a method for devising avoidance routes based on quantitative collision risk assessment. In particular, we propose an improved isochrone method, a cell-free approach akin to real ship navigation routes. The method uses a novel heuristic function to ensure effective collision avoidance, even in scenarios where conventional heuristic algorithms fail. Through verification cases, we demonstrate that the proposed method successfully avoided collisions, even in situations with unexpected lined-up ships, reducing maximum collision risk by up to 94.0%. Applications of the proposed method with actual AIS (Automatic Identification System) data yield simulation results with successful collision avoidance route planning. Comparing the proposed method to avoidance routes using other existing methods and to the actual ship's route, the proposed method was able to plan a route with a 37.5% improvement in maximum collision risk and a 13.6% improvement in average collision risk.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"16 ","pages":"Article 100613"},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2092678224000323/pdfft?md5=a7da5500e615082beb011c344988cbf3&pid=1-s2.0-S2092678224000323-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142121655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Digital twin approach with minimal sensors for Riser's fatigue-damage estimation 使用最少传感器的数字孪生方法进行立管疲劳损伤估算

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2024-01-01 DOI: 10.1016/j.ijnaoe.2024.100603

Yongseok Lee , Chungkuk Jin , MooHyun Kim , Wei Xu

{"title":"Digital twin approach with minimal sensors for Riser's fatigue-damage estimation","authors":"Yongseok Lee , Chungkuk Jin , MooHyun Kim , Wei Xu","doi":"10.1016/j.ijnaoe.2024.100603","DOIUrl":"10.1016/j.ijnaoe.2024.100603","url":null,"abstract":"<div><p>This study proposes riser fatigue monitoring based on digital twin models with a motion sensor attached to the platform and riser. The reference model was a spread-moored Floating Production Storage and Offloading (FPSO) with Steel Lazy-Wave Risers (SLWR). Coupled dynamics simulations under given environmental conditions were performed to generate synthetic sensor signals for digital twin models. Finite-element-based riser digital twin models were then constructed to run with the synthetic sensor inputs. A machine learning algorithm that estimates the 3D current profile along the water column was employed to improve the digital twin models by inputting the estimated current profile as additional loads. The digital twin models with or without the estimated current produce the time histories of behaviors and stresses along the riser, and the corresponding fatigue damage and life were estimated by the rainflow-counting method. The fatigue assessment results demonstrate its feasibility through small errors in fatigue damage.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"16 ","pages":"Article 100603"},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2092678224000220/pdfft?md5=4d051e95a7786f7bc6a93f27ab21d78c&pid=1-s2.0-S2092678224000220-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141393642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact load measurement of small multi-bubble explosions near solid wall 固体壁附近小型多气泡爆炸的冲击载荷测量

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2024-01-01 DOI: 10.1016/j.ijnaoe.2024.100600

Nyo Me Thet Naing , Seung-Ho Hyun , Rho-Taek Jung

{"title":"Impact load measurement of small multi-bubble explosions near solid wall","authors":"Nyo Me Thet Naing , Seung-Ho Hyun , Rho-Taek Jung","doi":"10.1016/j.ijnaoe.2024.100600","DOIUrl":"10.1016/j.ijnaoe.2024.100600","url":null,"abstract":"<div><p>The interaction of multiple spark-generated bubbles near solid boundary is investigated experimentally. Qualitative study is done with high-speed imaging for bubble shape evolution and PVDF sensor for impact force measurement. Similar-sized bubbles are created synchronously and distance between bubbles or boundary is chosen to be as small as possible. The jet direction of two horizontally aligned bubbles is strongly influenced by proximity parameter (γ) near boundary. The role of inter bubble distance (η) between bubbles and its contribution to intensity of impulsive force is also presented. It is found that strongest impact is recorded for horizontal pair, compared to vertical pair and diagonal pair, for small η values. Three bubbles are arranged with middle one which is smaller, similar or bigger than left and right bubbles. Allocating bigger bubble in the center indeed produces the most destructive impact on boundary among all cases. Moreover, diverse bubble deformation features are witnessed for various combination of dimensionless parameter applied in this study.</p></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"16 ","pages":"Article 100600"},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2092678224000190/pdfft?md5=baeb93512cdd1bc14c6d800f3e216b7d&pid=1-s2.0-S2092678224000190-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141412811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation-based deep reinforcement learning for multi-objective identical parallel machine scheduling problem

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2024-01-01 DOI: 10.1016/j.ijnaoe.2024.100629

Sohyun Nam , Young-in Cho , Jong Hun Woo

{"title":"Simulation-based deep reinforcement learning for multi-objective identical parallel machine scheduling problem","authors":"Sohyun Nam , Young-in Cho , Jong Hun Woo","doi":"10.1016/j.ijnaoe.2024.100629","DOIUrl":"10.1016/j.ijnaoe.2024.100629","url":null,"abstract":"<div><div>In the shipbuilding industry, traditional optimization studies based on linear programming and constraint programming have been conducted to solve mid-term or long-term scheduling problems. However, due to the extensive computational time, these methods face limitations in addressing short-term scheduling problems for the unit production systems of shipbuilding processes, where various environmental uncertainties must be considered. This study employs a deep reinforcement learning approach to develop a dynamic scheduling algorithm for the welding process in profile shops, considering the random arrival of materials and variability in processing time. The scheduling problems of the welding process are formulated as multi-objective identical parallel machine scheduling problems, aimed at minimizing both setup time and tardiness. This study proposes a novel Markov decision process model for the multi-objective scheduling problems for the welding process, incorporating setup requirements and due date-related constraints into the state representation, action modelling, and reward design. Additionally, based on the proposed Markov decision process model, this study develops a learning environment in which a discrete-event simulation model of the welding process is integrated for state transition considering the uncertainties in the welding process. In the training phase of the scheduling agent, the Proximal Policy Optimization algorithm is applied to learn the scheduling policy, which is approximated by deep neural networks. The performance of the proposed algorithm is validated in comparison to four priority rules (SSPT, ATCS, MDD, and COVERT) for various test scenarios with different workloads and levels of variability in processing time.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"16 ","pages":"Article 100629"},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical and experimental study of the dynamic response of a wind-wave combined energy platform under WEC motion constraints

IF 2.3 3区工程技术

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2024-01-01 DOI: 10.1016/j.ijnaoe.2024.100627

Hongbhin Kim , Weoncheol Koo

{"title":"Numerical and experimental study of the dynamic response of a wind-wave combined energy platform under WEC motion constraints","authors":"Hongbhin Kim , Weoncheol Koo","doi":"10.1016/j.ijnaoe.2024.100627","DOIUrl":"10.1016/j.ijnaoe.2024.100627","url":null,"abstract":"<div><div>The motion response of a wind–wave-combined energy platform with and without a wave energy converter (WEC) was analyzed using numerical simulations and wave tank experiments. The effects of the WEC power take-off (PTO) and WEC motion constraints on the motion response of the platform were also analyzed. The analyzed model consisted of cylindrical WECs attached to a spar-shaped floating offshore wind turbine (FOWT) from front to back. Numerical analysis was performed using a potential-flow-based hydrodynamic program (ANSYS AQWA) based on the boundary element method to perform time domain analysis. Nonlinear Froude–Krylov forces and hydrostatic forces were considered to improve the accuracy of the numerical results. The dynamic interactions between the FOWT and the mooring lines were considered. The numerical results showed good agreement with the experimental data. The pitch and heave of the combined platform were reduced significantly by the motion of the WEC attached to the FOWT. In particular, the rotational motion of the WEC had the greatest impact on the motion reduction of the platform. This effect helped reduce the mooring tension. On the other hand, the pitch response of the platform increased slightly when the WEC was fixed to the platform (no motion) or when a large PTO coefficient was applied.</div></div>","PeriodicalId":14160,"journal":{"name":"International Journal of Naval Architecture and Ocean Engineering","volume":"16 ","pages":"Article 100627"},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0