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Residual load-carrying capacity of stiffened panels with cracks under uniaxial tension loading considering crack propagation 考虑裂纹扩展的单轴拉伸加筋板的残余承载力
IF 2.2
Ship Technology Research Pub Date : 2021-04-08 DOI: 10.1080/09377255.2021.1904733
P. Fei, Zhang Yuelin, Mu Jinlei, Min Shao-song
{"title":"Residual load-carrying capacity of stiffened panels with cracks under uniaxial tension loading considering crack propagation","authors":"P. Fei, Zhang Yuelin, Mu Jinlei, Min Shao-song","doi":"10.1080/09377255.2021.1904733","DOIUrl":"https://doi.org/10.1080/09377255.2021.1904733","url":null,"abstract":"ABSTRACT The present work aims to analyse the ultimate strength of cracked stiffened panels under uniaxial tensile load. A series of finite element models of stiffened panels with various plate thickness, crack lengths, crack locations and crack angles are set up. The ultimate strengths are calculated by extended finite element method and the calculated results are compared to results without considering crack propagation. The results show that the thickness has little effect on the ultimate strength of stiffened plates with through cracks. The ultimate load carrying capacity can be overestimated 30–50% without considering crack propagation. The influence of a crack in the plate is larger than that of a crack located in the stiffener. The ultimate strength degrades with the increase of the angle between the crack and the load.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"69 1","pages":"105 - 114"},"PeriodicalIF":2.2,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2021.1904733","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47571714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A framework for rapid virtual prototyping: a case study with the Gunnerus research vessel 快速虚拟原型的框架:以Gunnerus研究船为例研究
IF 2.2
Ship Technology Research Pub Date : 2021-03-23 DOI: 10.1080/09377255.2021.1903128
P. Major, R. Zghyer, Houxiang Zhang, H. P. Hildre
{"title":"A framework for rapid virtual prototyping: a case study with the Gunnerus research vessel","authors":"P. Major, R. Zghyer, Houxiang Zhang, H. P. Hildre","doi":"10.1080/09377255.2021.1903128","DOIUrl":"https://doi.org/10.1080/09377255.2021.1903128","url":null,"abstract":"ABSTRACT Virtual prototypes (VPs) are digital models that mock-up existing or conceptual systems' behaviour. In offshore operations, VPs find usages in design, proof of concept for new equipment or method, control system testing, procedure planning, and expert crew training. Moreover, VP can be used in full mission simulators with crews of maritime and offshore engineers, in which case they integrate with control systems such as handles and dynamic positioning systems. Putting the human in the loop sets high requirements for the fidelity of the visual 3D-models and the mathematical models' validity. VPs are thus time-consuming to create and difficult to validate, even based on an existing offshore system. This paper presents an innovative framework for rapid virtual prototyping of ships for hardware and human in the loop simulations and validates the results with data gathered in a sea trial performed on a research vessel, with satisfying results for position keeping. Abbreviations: CLI, Command line interpreter; DP, Dynamic positioning system: ship equipment used to maintain position and heading; DM, Damping matrix; Force FBK, Force Feedback Thruster1; HIL, Hardware in the loop; HITL, Human in the loop; JNI, Java native interface; LC, Loading condition; RAO, Response amplitude operator; RPM, Revolutions per minute; RPM FBK, RPM Feedback Thruster2/3 (Main/Azimuth); SCM, Source code management system; SOG, Speed over ground; VP, Virtual prototyping/prototype; VST, Virtual sea trial; sea trial performed in a simulation","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"70 1","pages":"1 - 13"},"PeriodicalIF":2.2,"publicationDate":"2021-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2021.1903128","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45822038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
The influence of the propeller loading on the thrust deduction fraction 螺旋桨载荷对减推率的影响
IF 2.2
Ship Technology Research Pub Date : 2021-03-04 DOI: 10.1080/09377255.2021.1892934
Simone Saettone, B. Taskar, S. Steen, P. Andersen
{"title":"The influence of the propeller loading on the thrust deduction fraction","authors":"Simone Saettone, B. Taskar, S. Steen, P. Andersen","doi":"10.1080/09377255.2021.1892934","DOIUrl":"https://doi.org/10.1080/09377255.2021.1892934","url":null,"abstract":"ABSTRACT The estimation of the thrust deduction fraction is generally conducted in ideal weather conditions. However, the presence of waves considerably alters the magnitude of this propulsive coefficient. The increased load of the propeller could be the main cause for the variation of the thrust deduction fraction in realistic operating conditions. In this work, load-varying self-propulsion model-scale numerical simulations in calm water conditions for the same ship speed are performed to investigate the influence of the propeller loading on the thrust deduction fraction. The single screw model-scale KVLCC2 tanker is selected as the case study. The results reveal a non-linear inverse correlation between the thrust deduction fraction and the propeller loading. A comparison with model-testing conducted on the KVLCC2 tanker in regular head waves suggests that the propeller loading is the main factor influencing the magnitude of the thrust deduction fraction in waves for the considered case vessel.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"69 1","pages":"22 - 30"},"PeriodicalIF":2.2,"publicationDate":"2021-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2021.1892934","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45750400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Effects of nearshore wave reflections on the behaviour of an axe bow trimaran hull 近岸波浪反射对斧弓三体船船体性能的影响
IF 2.2
Ship Technology Research Pub Date : 2021-02-25 DOI: 10.1080/09377255.2021.1892906
Christopher Lewis McGibbon, Md Jahir Rizvi
{"title":"Effects of nearshore wave reflections on the behaviour of an axe bow trimaran hull","authors":"Christopher Lewis McGibbon, Md Jahir Rizvi","doi":"10.1080/09377255.2021.1892906","DOIUrl":"https://doi.org/10.1080/09377255.2021.1892906","url":null,"abstract":"ABSTRACT Trimaran hulls have some advantageous features over monohull and twin hull counterparts. Naval architects prefer to use axe bow when the achievement of high speed becomes the main design objective as this type of bow cuts through water rather than rising on top of waves. Structural and hydrodynamic behaviours of an axe bow trimaran depend significantly on its design features as well as the operating environment. However, such behaviours are unknown when the hull experiences nearshore wave reflections. Therefore, a scaled-model hull has been tested in coastal wave basin to investigate its behaviour under nearshore wave reflections focusing mainly on the hull’s motions in various heading directions as well as in various wave frequencies. The results presented also relate motions with the wave pressures indicating that an axe bow trimaran hull, travelling near shorelines, experiences unusual motions and wave loadings when it encounters waves influenced by nearshore reflections.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"68 1","pages":"179 - 188"},"PeriodicalIF":2.2,"publicationDate":"2021-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2021.1892906","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42207398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An investigation of scale effects on marine propeller under cavitating and non-cavitating conditions 船用螺旋桨在空化和非空化条件下的尺度效应研究
IF 2.2
Ship Technology Research Pub Date : 2021-02-16 DOI: 10.1080/09377255.2021.1883800
A. Soydan, S. Bal
{"title":"An investigation of scale effects on marine propeller under cavitating and non-cavitating conditions","authors":"A. Soydan, S. Bal","doi":"10.1080/09377255.2021.1883800","DOIUrl":"https://doi.org/10.1080/09377255.2021.1883800","url":null,"abstract":"ABSTRACT In this study, scale effects on the hydrodynamic performance of DTMB 4119 propeller have been investigated in uniform flow under non-cavitating and cavitating conditions by a simple practical method based on OpenFOAM. A potential based Lifting Surface Method has also been applied. A verification study of non-cavitating simulations has been carried out by Grid Convergence Index method at one scale ratio. Then the results have been validated with experiments. Schnerr-Sauer cavitation model of OpenFOAM has been used for the phase change between vapor and liquid. Cavitation simulations have been performed as a time-dependent with dynamic mesh while non-cavitating simulations have been carried out as a steady-state with static mesh. Effects of the scale ratio and cavitation simulations have been investigated and a simple fitting procedure on the thrust and torque values based on logarithm of Reynolds number have been applied. Results have also been compared with ITTC corrections.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"68 1","pages":"166 - 178"},"PeriodicalIF":2.2,"publicationDate":"2021-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2021.1883800","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48305220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Manoeuvring prediction of a container ship in shallow water using numerical planar motion mechanism 基于数值平面运动机制的集装箱船浅水操纵预测
IF 2.2
Ship Technology Research Pub Date : 2021-02-16 DOI: 10.1080/09377255.2021.1883799
Akhil Balagopalan, P. Krishnankutty
{"title":"Manoeuvring prediction of a container ship in shallow water using numerical planar motion mechanism","authors":"Akhil Balagopalan, P. Krishnankutty","doi":"10.1080/09377255.2021.1883799","DOIUrl":"https://doi.org/10.1080/09377255.2021.1883799","url":null,"abstract":"ABSTRACT Manoeuvring behaviour of a vessel changes drastically when it enters from deep water region to a shallow water region. Flow characteristics, around the hull changes and the vessel, respond poorly to the use of control surfaces. Aim of this paper is to study the manoeuvring behavioural changes in a container ship for different water depth conditions. Computational fluid dynamic (CFD) methods are used for simulating static and dynamic captive model tests. Variation in hydrodynamic reaction forces and moments caused by the reduction in water depth and the subsequent effect in hydrodynamic derivatives appearing in the equation of motion are explained in detail. Standard turning circle and zigzag manoeuvring tests are simulated using the CFD generated hydrodynamic derivatives to assess the manoeuvring characteristics of the vessel.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"68 1","pages":"147 - 165"},"PeriodicalIF":2.2,"publicationDate":"2021-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2021.1883799","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45457212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Condition assessment of ship structure using robot assisted 3D-reconstruction 机器人辅助三维重建舰船结构状态评估
IF 2.2
Ship Technology Research Pub Date : 2021-01-18 DOI: 10.1080/09377255.2021.1872219
Faisal Mehmood Shah, T. Gaggero, M. Gaiotti, C. Rizzo
{"title":"Condition assessment of ship structure using robot assisted 3D-reconstruction","authors":"Faisal Mehmood Shah, T. Gaggero, M. Gaiotti, C. Rizzo","doi":"10.1080/09377255.2021.1872219","DOIUrl":"https://doi.org/10.1080/09377255.2021.1872219","url":null,"abstract":"ABSTRACT Ships condition is assessed regularly to maintain safety. Traditionally, structural integrity assessment is performed by surveyors, requiring complex and time-consuming operations to accessany ship space. Imagery based, three-dimensional (3D) reconstruction of structures is a new area obtaining considerable interest. It can provide low-cost, less disruptive and safer inspection approach. In this study, alternative technologies to generate 3D models, based on photos, are explored. The aim is to highlight how human made ship survey can be improved using robotics technology. A procedure for 3D reconstruction combining photogrammetry/videogrammetry and computer vision techniques is developed, providing an alternative to ease vessel inspections. Moreover, effect of pre-processing image datasets, aimed at improving the performance of 3D reconstruction, is investigated. An efficient image pre-processing pipeline based on computer vision algorithms for colour enhancement, shadow removal and image blurriness is presented. This study can help in effective and reliable decision-making process, due to its user-friendliness and cost effectiveness, mainly for cargo holds requiring frequent assessment because of cargo operations induced damages.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"68 1","pages":"129 - 146"},"PeriodicalIF":2.2,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2021.1872219","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43774913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Experimental and numerical studies on linear and nonlinear seakeeping phenomena of the DTC ship in regular waves DTC船在规则波中线性和非线性耐波性的实验和数值研究
IF 2.2
Ship Technology Research Pub Date : 2020-12-16 DOI: 10.1080/09377255.2020.1857007
Shukui Liu, F. Sprenger, A. Papanikolaou, G. Dafermos, G. Zaraphonitis
{"title":"Experimental and numerical studies on linear and nonlinear seakeeping phenomena of the DTC ship in regular waves","authors":"Shukui Liu, F. Sprenger, A. Papanikolaou, G. Dafermos, G. Zaraphonitis","doi":"10.1080/09377255.2020.1857007","DOIUrl":"https://doi.org/10.1080/09377255.2020.1857007","url":null,"abstract":"ABSTRACT The paper presents a comprehensive numerical and experimental study on linear and nonlinear seakeeping phenomena, including six degree of freedom (DOF) ship motions, added resistance, drift forces and moments of the DTC containership in regular waves. Obtained numerical results by the 3D panel method NEWDRIFT+ of NTUA-SDL are systematically compared with corresponding experimental data generated within the SHOPERA project (2013–2016) at MARINTEK for various wave headings at low to moderate speeds. The herein presented experimental data are useful not only for validating the employed seakeeping software and others as a benchmark yardstick, but also for the deeper analysis of various open nonlinear seakeeping issues encountered in the prediction of the added resistance and drift forces of modern large containerships in waves.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"68 1","pages":"41 - 61"},"PeriodicalIF":2.2,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2020.1857007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49619889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Advances on simulation of wave-body interactions under consideration of the nonlinear free water surface 考虑非线性自由水面的波体相互作用模拟研究进展
IF 2.2
Ship Technology Research Pub Date : 2020-10-29 DOI: 10.1080/09377255.2020.1836551
D. Ferreira González, U. Göttsche, S. Netzband, M. Abdel‐Maksoud
{"title":"Advances on simulation of wave-body interactions under consideration of the nonlinear free water surface","authors":"D. Ferreira González, U. Göttsche, S. Netzband, M. Abdel‐Maksoud","doi":"10.1080/09377255.2020.1836551","DOIUrl":"https://doi.org/10.1080/09377255.2020.1836551","url":null,"abstract":"ABSTRACT The paper refers to a boundary element method (BEM) in the time domain for the simulation of wave-body interactions considering the free water surface. The approach solves the boundary integral equations for the velocity and the acceleration potential. The model of the free water surface in this approach is based on the mixed-Eulerian-Lagrangian (MEL) method. Validation results are presented for two well-studied test cases. The first validation case is dedicated to the free water surface. Here, the nonlinear wave loads on a truncated cylinder are analysed and compared with a higher-order panel method and experimental data. Second, results of a Wigley hull moving with forward speed in head waves are shown and compared with experimental results published by Kashiwagi. The validation results in both test cases generally show good agreement with published data and demonstrate the ability of BEM to investigate different types of hydrodynamic problems related to wave-body interactions.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"68 1","pages":"27 - 40"},"PeriodicalIF":2.2,"publicationDate":"2020-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2020.1836551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41956551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Virtual prototyping of offshore operations: a review 海上作业的虚拟原型:综述
IF 2.2
Ship Technology Research Pub Date : 2020-10-15 DOI: 10.1080/09377255.2020.1831840
P. Major, Houxiang Zhang, Hans Petter Hildre, Mathieu Edet
{"title":"Virtual prototyping of offshore operations: a review","authors":"P. Major, Houxiang Zhang, Hans Petter Hildre, Mathieu Edet","doi":"10.1080/09377255.2020.1831840","DOIUrl":"https://doi.org/10.1080/09377255.2020.1831840","url":null,"abstract":"ABSTRACT Virtual prototyping of offshore operations (VPOO) is performed to plan and validate planning of infrequent or demanding operations characterized by high risk and low margins of error in hostile and remote environments distant from emergency response bases that require expensive equipment. Key elements of VPOO is the rapidity of virtual prototyping and the human-centric approach necessitating high quality visuals and real-time time-domain simulation. This survey reviews publications, commercial software and simulators, and regulations on offshore operations. Findings indicate that the VPOO is not common in the industry, offshore operation regulations lag behind the state of the art in industry in terms of mission planning, and this field has been subject to scarce commercial and scientific scrutiny so far. A discussion of future developments and trends concludes the paper.","PeriodicalId":51883,"journal":{"name":"Ship Technology Research","volume":"68 1","pages":"84 - 101"},"PeriodicalIF":2.2,"publicationDate":"2020-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09377255.2020.1831840","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48510241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
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