Applied Ocean Research最新文献_第5页

Development of a coupled model for the interaction between internal solitary waves and free surface waves 内孤立波与自由表面波相互作用耦合模型的建立

IF 4.4 2区工程技术

Applied Ocean Research Pub Date : 2025-08-28 DOI: 10.1016/j.apor.2025.104739

Zihan Zhang, Tongqing Chen, Qinghe Zhang, Zhipeng Zang, Mingyu Li

{"title":"Development of a coupled model for the interaction between internal solitary waves and free surface waves","authors":"Zihan Zhang, Tongqing Chen, Qinghe Zhang, Zhipeng Zang, Mingyu Li","doi":"10.1016/j.apor.2025.104739","DOIUrl":"10.1016/j.apor.2025.104739","url":null,"abstract":"<div><div>Internal solitary waves (ISWs) and free surface waves interact dynamically; this is necessary for the safety of offshore structures and underwater vehicles. A coupled model was developed to simulate the interaction between ISWs and free surface waves in continuously stratified ocean waters. The density transport equation was introduced into a two-phase (air-water) model based on the three-dimensional Navier-Stokes equations. The method of initializing the flow field was adopted to generate ISWs based on the fully nonlinear Dubreil-Jacotin-Long (DJL) equation, and the relaxation zone method was employed to generate and absorb the surface waves. Grid sensitivity analysis revealed that the height of the refined grid region beneath the surface should be at least thirty times the surface wave height in the deep ocean applications, which is quite different from that required for simulating surface waves in coastal areas. Validation of the model against laboratory experiments demonstrated that the simulated results agree well with the measured data. The coupled model was applied to simulate the surface displacement induced by an ISW and the modulation of surface waves by the ISW. The simulation results indicate that the coupled model can capture for the interaction between ISWs and surface waves, providing a potential tool for studying the coupled effects between them.</div></div>","PeriodicalId":8261,"journal":{"name":"Applied Ocean Research","volume":"163 ","pages":"Article 104739"},"PeriodicalIF":4.4,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144908955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on hole erosion behaviors of marine soil solidified by an innovative organic composite material 新型有机复合材料固化海相土壤孔洞侵蚀特性试验研究

IF 4.4 2区工程技术

Applied Ocean Research Pub Date : 2025-08-28 DOI: 10.1016/j.apor.2025.104755

Ben He , Peng Yue , Yongqiang Zhu , Hengyu Liu , Zhen Guo , Yujie Li

{"title":"Experimental study on hole erosion behaviors of marine soil solidified by an innovative organic composite material","authors":"Ben He , Peng Yue , Yongqiang Zhu , Hengyu Liu , Zhen Guo , Yujie Li","doi":"10.1016/j.apor.2025.104755","DOIUrl":"10.1016/j.apor.2025.104755","url":null,"abstract":"<div><div>To enhance the erosion resistance of marine soil and ensure the stability of offshore infrastructures, this study developed an innovative organic composite material (OCM) as a solidifier. The erosion resistance of OCM-treated marine soil was evaluated using a hole erosion test apparatus, capturing the complete erosion process, including temperature regulation, water storage hole cleaning, linear erosion, and accelerated erosion stages. A relationship between hydraulic shear stress and erosion rate was established, focusing on two key parameters: critical shear stress <span><math><msub><mi>τ</mi><mi>c</mi></msub></math></span> and erosion rate index ERI. Results demonstrated that OCM significantly improved erosion resistance by maintaining soil structural integrity under scour conditions. This enhancement was attributed to the filling and bonding effects of hydration products such as calcium silicate hydrate (C-S-H), ettringite (AFt), and calcium hydroxide. Increasing solidifier content and extending curing time further enhanced the erosion resistance of soil, but the increase in OPC group was significantly less than that in OCM group. Specifically, when the solidifier content increase from 5 % to 10 %, the <span><math><msub><mi>τ</mi><mi>c</mi></msub></math></span> and ERI of OPC samples at 4 h curing time increased by 87 % and 15.9 %, while the <span><math><msub><mi>τ</mi><mi>c</mi></msub></math></span> and ERI of OCM samples at 4 h curing time increased by 86 % and 24.5 %. Additionally, as the temperature increased, the double electrical layer force between the solidified soil structures weakened, thus decreasing the critical shear stress of soil. These findings highlight the superior performance of OCM in enhancing marine soil stability, making it a promising solution for long-term offshore infrastructure protection against erosion.</div></div>","PeriodicalId":8261,"journal":{"name":"Applied Ocean Research","volume":"163 ","pages":"Article 104755"},"PeriodicalIF":4.4,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144908946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An integrated interval type-2 fuzzy SLIM and FEM model for working aloft risk analysis in shipboard operations 船舶作业高空作业风险综合区间2型模糊SLIM和FEM模型

IF 4.4 2区工程技术

Applied Ocean Research Pub Date : 2025-08-28 DOI: 10.1016/j.apor.2025.104742

Orkun Burak Öztürk , Şaban Emre Kartal , İdris Turna , Ahmet Emre Pirim , Zafer Kurt , Yılmaz Güvercin , Murat Yaylaci

{"title":"An integrated interval type-2 fuzzy SLIM and FEM model for working aloft risk analysis in shipboard operations","authors":"Orkun Burak Öztürk , Şaban Emre Kartal , İdris Turna , Ahmet Emre Pirim , Zafer Kurt , Yılmaz Güvercin , Murat Yaylaci","doi":"10.1016/j.apor.2025.104742","DOIUrl":"10.1016/j.apor.2025.104742","url":null,"abstract":"<div><div>Working aloft on merchant vessels entails significant risks, necessitating rigorous safety protocols to mitigate potentially severe or fatal outcomes. Despite adherence to safety management systems and operational guidelines, incidents persist due to multifaceted contributing factors, notably the human error. This study introduces an innovative risk analysis framework by integrating the Success Likelihood Index Methodology (SLIM) with Interval Type-2 Fuzzy Sets (IT2FSs) and the Finite Element Method (FEM) to evaluate fall-related hazards during shipboard operations. SLIM quantifies human error probability (HEP) in tasks performed within cargo spaces, while IT2FSs enhance uncertainty modelling, and FEM provides detailed biomechanical insights into the consequences of falls from varying heights. The highest performance shaping factor (PSF) scores for Leadership and Supervision, Fatigue/Workload and Risk Acceptance, respectively – which are critical to the human factor – emphasize the need for proactive risk mitigation measures to strengthen the effectiveness of safety action frameworks in relation to work at height. Also, the FEM findings demonstrate that victims of falls on ships can incur fatal injuries even at relatively low heights, subject to the configuration and trajectory of the fall. This integrated methodology offers maritime authorities and ship operators a robust tool to reduce accident rates and elevate occupational safety standards.</div></div>","PeriodicalId":8261,"journal":{"name":"Applied Ocean Research","volume":"163 ","pages":"Article 104742"},"PeriodicalIF":4.4,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144908954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Trends of extreme waves driven by landfalling typhoons in the East China Sea 东中国海登陆台风引发的极端海浪趋势

IF 4.4 2区工程技术

Applied Ocean Research Pub Date : 2025-08-26 DOI: 10.1016/j.apor.2025.104741

Feng Luo , Yongqi Huang , Yi Wang , Jinhai Zheng , Aifeng Tao , Hongping Zhao , Peng Tian

{"title":"Trends of extreme waves driven by landfalling typhoons in the East China Sea","authors":"Feng Luo , Yongqi Huang , Yi Wang , Jinhai Zheng , Aifeng Tao , Hongping Zhao , Peng Tian","doi":"10.1016/j.apor.2025.104741","DOIUrl":"10.1016/j.apor.2025.104741","url":null,"abstract":"<div><div>Extreme waves, primarily driven by typhoons, carry immense energy and pose serious threats to coastal infrastructure. With the increasing frequency of extreme weather events under global climate change, a comprehensive understanding of the evolution and drivers of extreme wave events is urgently needed. This study investigates the long-term variability and spatial patterns of extreme significant wave height (SWH) in the East China Sea by reconstructing wave fields for 171 landfalling typhoons from 1949 to 2022, based on best-track data from the China Meteorological Administration and simulations using the SWAN model. Statistical methods, including Mann-Kendall trend analysis and Empirical Orthogonal Function (EOF) decomposition, are employed to identify trends and dominant spatial modes. Results reveal pronounced spatial heterogeneity in extreme wave height trends, with a slight increase in the southeastern East China Sea (1 <em>cm</em>/<em>yr</em>) and a marked decrease in the Yellow and Bohai Seas (up to –2 <em>cm</em>/<em>yr</em>). The first EOF mode dominates the spatial pattern of extreme wave variability. Correlation analysis shows that typhoon genesis location, landfall longitude, and the position of the lifetime maximum intensity (LMI) are significantly and positively associated with extreme wave heights, while latitudinal shifts exhibit a poleward migration trend with a negative feedback on extremes. Additionally, typhoon intensity and seasonal characteristics substantially influence the spatial distribution of extreme waves. These findings enhance our understanding of the dynamics of extreme waves and provide valuable insights for coastal engineering design and risk assessment in a changing climate.</div></div>","PeriodicalId":8261,"journal":{"name":"Applied Ocean Research","volume":"163 ","pages":"Article 104741"},"PeriodicalIF":4.4,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Accelerating an implicit ocean model using CUDA C 使用CUDA C加速隐式海洋模型

IF 4.4 2区工程技术

Applied Ocean Research Pub Date : 2025-08-25 DOI: 10.1016/j.apor.2025.104740

Jianbin Xie , Xingru Feng , Tianhai Gao , Changming Dong , Baoshu Yin , Changmao Wu

{"title":"Accelerating an implicit ocean model using CUDA C","authors":"Jianbin Xie , Xingru Feng , Tianhai Gao , Changming Dong , Baoshu Yin , Changmao Wu","doi":"10.1016/j.apor.2025.104740","DOIUrl":"10.1016/j.apor.2025.104740","url":null,"abstract":"<div><div>In this study, we developed an ocean model named GPU-IOCASM (GPU-Implicit Ocean Current and Storm Surge Model), which employs the finite difference method with implicit iteration to ensure simulation stability. Additionally, it incorporates an online nesting for multi-layer computational grids, allowing localized grid refinement in critical regions to enhance simulation accuracy. To maximize GPU parallelism and minimize memory overhead, we optimized the residual update algorithm, applied a mask-based conditional computation method, and designed an adaptive iteration count prediction strategy. When the simulation reaches a designated output time, relevant variables are copied from GPU memory to host memory, while the GPU proceeds with the next computation without waiting for the I/O operation to complete. This process is designed to run asynchronously in most cases, ensuring that data transfer and CPU-side operations do not interfere with GPU-based computation. Verification results demonstrate that GPU-IOCASM's simulation results exhibit strong agreement with both observed data and SCHISM’s results, confirming its reliability and precision. Furthermore, GPU-IOCASM achieves a remarkable speedup of over 312 times compared with traditional CPU-based approaches. Unlike traditional GPU acceleration methods that require frequent data transfers between the CPU and GPU, GPU-IOCASM is designed to perform as much computation as possible on the GPU, thereby minimizing data transfer overhead and improving computational efficiency.</div></div>","PeriodicalId":8261,"journal":{"name":"Applied Ocean Research","volume":"163 ","pages":"Article 104740"},"PeriodicalIF":4.4,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strength properties and strength criterion of unconsolidated hydrate-bearing sediment under the effect of clay minerals 粘土矿物作用下疏松含水泥沙强度特性及强度判据

IF 4.4 2区工程技术

Applied Ocean Research Pub Date : 2025-08-23 DOI: 10.1016/j.apor.2025.104738

Yuanwei Sun , Yuanfang Cheng , Jian Zhao , Chuanliang Yan , Xian Shi , Fengxia Shi

{"title":"Strength properties and strength criterion of unconsolidated hydrate-bearing sediment under the effect of clay minerals","authors":"Yuanwei Sun , Yuanfang Cheng , Jian Zhao , Chuanliang Yan , Xian Shi , Fengxia Shi","doi":"10.1016/j.apor.2025.104738","DOIUrl":"10.1016/j.apor.2025.104738","url":null,"abstract":"<div><div>The Shenhu sea area is characterized by substantial natural gas hydrate (NGH) resources, where clay minerals exert a considerable influence on the mechanical properties of the surrounding sediments. This influence is further amplified during hydrate decomposition. Given this context, the composition and geological characteristics of the shallow, clay-rich, hydrate-bearing sediments specific to the Shenhu sea area was investigated. Subsequently, a series of carefully controlled triaxial mechanical experiments were performed on in-situ synthesized hydrate-bearing sediments, which determined the variations in strength parameters under different clay contents, and facilitated the development of an effective strength criterion through multiple regression analysis. The results indicate that: (1) Clay minerals significantly affect the mechanical behavior of hydrate-bearing sediments. An increase in clay content is associated with a decrease in peak strength. Under the influence of hydrate saturation and effective confining pressure, hydrate-bearing sediments exhibit similar mechanical responses across varying clay contents. The peak strength demonstrates a linear relationship with hydrate saturation while a non-linear relationship with effective confining pressure. (2) Cohesion and the internal friction angle generally decrease with increasing clay content and decreasing hydrate saturation. However, variations in cohesion are more pronounced and follow a more consistent pattern, which are characterized as a function of clay content and hydrate saturation. (3) Based on the Mohr-Coulomb criterion, a high-precision strength criterion for unconsolidated hydrate-bearing sediments is established incorporating the effects of clay content, hydrate saturation, and effective confining pressure. This research provides a valuable reference for the design and optimization of NGH drilling and production operations in the Shenhu sea area.</div></div>","PeriodicalId":8261,"journal":{"name":"Applied Ocean Research","volume":"163 ","pages":"Article 104738"},"PeriodicalIF":4.4,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Load responses of semirigid and semiflexible segment joints in submerged floating tunnels 沉水浮式隧道半刚性和半柔性节段节点荷载响应

IF 4.4 2区工程技术

Applied Ocean Research Pub Date : 2025-08-21 DOI: 10.1016/j.apor.2025.104734

Linjian Wu , Zhouyu Xiang , Mingwei Liu , Zhonghao Wang , Bo Liu , Yunfeng Xiao

{"title":"Load responses of semirigid and semiflexible segment joints in submerged floating tunnels","authors":"Linjian Wu , Zhouyu Xiang , Mingwei Liu , Zhonghao Wang , Bo Liu , Yunfeng Xiao","doi":"10.1016/j.apor.2025.104734","DOIUrl":"10.1016/j.apor.2025.104734","url":null,"abstract":"<div><div>Submerged floating tunnels (SFTs) have garnered significant attention because of their application potential. The joints between segments of a submerged floating tunnel are critical and vulnerable components of the overall structure. The mechanical properties of the joints significantly impact tunnel safety and service life. The structural configuration of semirigid and semiflexible joints in SFTs has been introduced and preliminarily studied. However, there are currently few publications discussing the analysis methods for the load responses of these joints in SFTs under external combined loads, as well as the mechanical mechanisms underlying structural behavior. Therefore, a three-dimensional numerical model for semirigid and semiflexible joints in SFTs is established in this paper, and the stress-strain characteristics of the flexible material (gasket) have been accurately simulated based on the hyperelastic constitutive relationship. A three-dimensional numerical simulation method is proposed to assess the load-bearing responses of semirigid and semiflexible joints, and stress states of segment joints in complex marine service environments are considered. Furthermore, the load-bearing responses of the segment joint structure under various loading conditions were explored, including axial load‒axial load, axial load‒shear load, axial load‒moment load, axial load‒torsion load, and axial load‒shear load‒moment load. The findings reveal that the axial load on the segment joint predominantly influences the load modes under composite loading. After exceeding the threshold, composite loads will lead to excessive stress in the segment joint, gasket failure, and excessive rotation angles within the segment joint structure. The research results of this paper yield valuable reference data and a theoretical foundation for practical design in SFTs engineering.</div></div>","PeriodicalId":8261,"journal":{"name":"Applied Ocean Research","volume":"162 ","pages":"Article 104734"},"PeriodicalIF":4.4,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144878682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Linear deterministic sea wave prediction for tank testing using single summation sea models 用单求和海模型预测水槽试验的线性确定性海浪

IF 4.4 2区工程技术

Applied Ocean Research Pub Date : 2025-08-20 DOI: 10.1016/j.apor.2025.104714

M.R. Belmont

{"title":"Linear deterministic sea wave prediction for tank testing using single summation sea models","authors":"M.R. Belmont","doi":"10.1016/j.apor.2025.104714","DOIUrl":"10.1016/j.apor.2025.104714","url":null,"abstract":"<div><div>This paper deals with the creation of phase resolved sea models from wave data both for creating sea wave generation models and for building wave prediction models. The main application of these considered here is in Deterministic Sea Wave Prediction (DSWP). The focus is on the so-called Single Summation Method (SSM). The SSM was introduced by certain researchers to address artifacts found in experimental tank testing work encountered when using discrete forms of the standard linear oceanographic wave description, i.e., the Double Summation Method (DSM). Unlike DSM the SSM is essentially a one-dimensional method, because only one wave component is used in each propagation direction. This might seem to make the SSM potentially attractive for wider applications than tank testing because it requires less computational resources than DSM which is fully two dimensional. Exploration of the SSM shows that it is not suitable for use with the spatial wave data typically employed for DSM. As developed here SSM based DSWP relies on time series data from two separate locations which considerably reduces the predict ahead time available in DSWP applications as compared to DSM. Furthermore, to avoid multi-valuedness in estimating the wave propagation directions conditions must be imposed that make SSM very sensitive to additive noise.</div></div>","PeriodicalId":8261,"journal":{"name":"Applied Ocean Research","volume":"162 ","pages":"Article 104714"},"PeriodicalIF":4.4,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144866425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A comprehensive review of data processing for ship performance analysis 船舶性能分析中数据处理的综合综述

IF 4.4 2区工程技术

Applied Ocean Research Pub Date : 2025-08-20 DOI: 10.1016/j.apor.2025.104737

Youngrong Kim , Prateek Gupta , Sverre Steen

{"title":"A comprehensive review of data processing for ship performance analysis","authors":"Youngrong Kim , Prateek Gupta , Sverre Steen","doi":"10.1016/j.apor.2025.104737","DOIUrl":"10.1016/j.apor.2025.104737","url":null,"abstract":"<div><div>Reliable ship performance analysis can help prevent misguided navigation decisions and enable a more accurate estimation of fuel consumption. Supporting decarbonisation goals and following increasingly stringent maritime regulations will depend on these capabilities. While analysis tools and data collection have come a long way, the processing and managing of ship performance data is still continuously challenged by its complexity and inherent imperfections. Despite its importance, there is still little systematic research on how to process data confined to this field. This paper presents a comprehensive review of methodologies aimed at addressing data-related challenges in ship performance analysis. Based on literature published between 2014 and 2024, the authors identified major data sources such as AIS, onboard sensors, and noon reports, and we examined common quality issues. Subsequently, key processing techniques, including data synchronisation, missing value imputation, data cleaning, and uncertainty management, are evaluated in terms of their applications, effectiveness, and limitations. This review also highlights a significant gap due to the lack of a consistent unified processing pipeline. Resolving these challenges requires not only improved methodologies but also collective efforts to establish benchmark datasets and best practices. These research efforts are critical to enabling reliable data-driven decisions and sustainable ship operations.</div></div>","PeriodicalId":8261,"journal":{"name":"Applied Ocean Research","volume":"162 ","pages":"Article 104737"},"PeriodicalIF":4.4,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144878817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A decoupled prediction model for hydrodynamic forces on near-wall cylinders in combined wave-current boundary layers 波流联合边界层中近壁圆柱体水动力解耦预测模型

IF 4.4 2区工程技术

Applied Ocean Research Pub Date : 2025-08-19 DOI: 10.1016/j.apor.2025.104736

Muk Chen Ong, Guang Yin

{"title":"A decoupled prediction model for hydrodynamic forces on near-wall cylinders in combined wave-current boundary layers","authors":"Muk Chen Ong, Guang Yin","doi":"10.1016/j.apor.2025.104736","DOIUrl":"10.1016/j.apor.2025.104736","url":null,"abstract":"<div><div>The prediction of hydrodynamic forces on subsea structures, such as pipelines and power cables laid near the seabed, is critical for ensuring their on-bottom stability and long-term integrity in marine environments. Traditionally, the Morison equation has been used to estimate these forces, which decomposes forces into inertial and viscous components. However, this approach does not fully capture the influences of the boundary layer and gap between the structures and the bottom wall. A novel decoupled model is proposed in the present study to predict the hydrodynamic forces on a near-wall cylinder subjected to a combined current-wave induced boundary layer flow, representative of subsea cables and pipelines in coastal and offshore environments. This model explicitly separates the effects of the boundary layer on the hydrodynamic coefficient and local flow velocity, treating them as two independent components. The hydrodynamic coefficients are obtained through numerical simulations of a time-dependent, wall-normal uniform flow over a friction-free bottom wall, thereby eliminating boundary layer effects. These coefficients are time-dependent and are governed by the cylinder-wall gap. Meanwhile, the local flow velocity is determined using an analytical velocity profile which accounts for velocity reduction due to the boundary layer effects. The performance of the predictive model is systematically evaluated across different flow conditions and gap ratios. Comparisons with numerical simulations for a near-wall cylinder subjected to a combined current-wave boundary layer flow demonstrate that the decoupled model can predict the drag forces with satisfactory agreement. While the lift forces tend to be overpredicted in some cases, this conservative estimation remains acceptable for engineering design. The proposed model offers an efficient and practical approach for estimating hydrodynamic forces on power cables, pipelines and other coastal and offshore infrastructure subjected under boundary layer effects.</div></div>","PeriodicalId":8261,"journal":{"name":"Applied Ocean Research","volume":"162 ","pages":"Article 104736"},"PeriodicalIF":4.4,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144866424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0