Volume 6: Ocean Engineering最新文献_第3页

Design and Research of Offshore Oil Spill Removal Ship With Variable Angle of Attack 变攻角海上除油船的设计与研究

Volume 6: Ocean Engineering Pub Date : 2021-06-21 DOI: 10.1115/omae2021-63546

Qibin Ou, Jin Yang, Zhenxiang Zhang, Luo Liu, Yichi Zhang, Ximo Qu

{"title":"Design and Research of Offshore Oil Spill Removal Ship With Variable Angle of Attack","authors":"Qibin Ou, Jin Yang, Zhenxiang Zhang, Luo Liu, Yichi Zhang, Ximo Qu","doi":"10.1115/omae2021-63546","DOIUrl":"https://doi.org/10.1115/omae2021-63546","url":null,"abstract":"\u0000 With the continuous development of the global economy and industry, and gradually expand the size of offshore oil exploration and transportation, the possibility of oil field leakage, damage of offshore tanker, oil leakage of the offshore ship and the oil spill is increasing continuously, and the harmfulness is increasing continuously. It has seriously polluted the Marine environment and destroyed the ecological balance, and seriously wasted the oil resources. Therefore, this paper developed a kind of offshore oil spill removal ship which can quickly, accurately, and effectively recover oil spill. This paper designs an offshore oil removal device with a variable Angle of attack. Through the use of Rhino and SolidWorks modeling software for the three-dimensional overall design. The variable Angle of attack offshore oil spill removal ship can be divided into seven major systems, which are the main hull of the variable angle of attack, the side hull, the oil suction, and deoiling rollers, the oil collecting groove and oil collecting chamber, the oil baffle, the steering platform, the communication equipment, the propulsion equipment, the main hull, and the external ship docking equipment. At the same time, the new type of offshore oil absorption material is installed on the double roller oil absorption mechanism, and each component system of the offshore oil removal ship is assembled. In this paper, the design of a variable Angle of attack offshore oil spill removal ship can provide a reference for the research and design of a new offshore oil spill treatment device.","PeriodicalId":23784,"journal":{"name":"Volume 6: Ocean Engineering","volume":"16 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91549183","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

CFD Simulation of Nonlinear Deep-Water Wave Instabilities Involving Wave Breaking 涉及破波的非线性深水波浪不稳定性CFD模拟

Volume 6: Ocean Engineering Pub Date : 2021-06-21 DOI: 10.1115/omae2021-62805

Yuzhu Li, D. Fuhrman

引用次数: 0

Development and Testing of Bridle Line Power Generation for Aquaculture 水产养殖用缰绳发电的研制与试验

Volume 6: Ocean Engineering Pub Date : 2021-06-21 DOI: 10.1115/omae2021-62888

Patrick M. Grehan, C. Casey, P. McEvoy, A. Wann

{"title":"Development and Testing of Bridle Line Power Generation for Aquaculture","authors":"Patrick M. Grehan, C. Casey, P. McEvoy, A. Wann","doi":"10.1115/omae2021-62888","DOIUrl":"https://doi.org/10.1115/omae2021-62888","url":null,"abstract":"\u0000 This paper presents the development and testing of Gator, a hydraulic Power Take Off (PTO) being commercialised for the Aquaculture market. Gator uses a novel polymer bellows to pump pressurised water through a power take off system, while also providing a non-linear force response that reduces mooring line loads over traditional mooring lines.\u0000 The Gator system is comprised of 4 distinct subsystems: The Gator pump, hydraulics, turbine, and electrical storage & control. The Gator pump is a polymer component that compresses under load, pumping water through check valves into the hydraulic system. The connected hydraulic system takes the pressurised water, regulates the pressure and flow rates with an accumulator, and provides a steady flow of water to the turbine, generating electricity.\u0000 This paper will provide an overview of the technical development of the Gator system over several phases, which has focussed its adaptation for use in the aquaculture industry as an inline pump on cage mooring lines.\u0000 A description of comprehensive testing undertaken on a linear test rig to simulate the variable loading that the system would experience in operation will be provided as well as some of the early characterisation results from this testing.","PeriodicalId":23784,"journal":{"name":"Volume 6: Ocean Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82098785","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

Experimental and Numerical Study of the Influence of Drag Coefficient on Snap Loads in Mooring Lines of a Floating Offshore Wind Turbine 阻力系数对海上浮式风力机系泊索瞬时载荷影响的实验与数值研究

Volume 6: Ocean Engineering Pub Date : 2021-06-21 DOI: 10.1115/omae2021-60794

Brendan Guillouzouic, François Pétrié, V. Lafon, Fabienne Fremont

{"title":"Experimental and Numerical Study of the Influence of Drag Coefficient on Snap Loads in Mooring Lines of a Floating Offshore Wind Turbine","authors":"Brendan Guillouzouic, François Pétrié, V. Lafon, Fabienne Fremont","doi":"10.1115/omae2021-60794","DOIUrl":"https://doi.org/10.1115/omae2021-60794","url":null,"abstract":"\u0000 Mooring is one of the key components of a floating offshore wind turbine since the mooring rupture may lead to the total loss of one or even several turbines in a farm.\u0000 Even if a large experience in moorings of floating bodies was gained in the oil & gas industry, the renewable energies face new challenges such as reducing the cost as much as possible, reducing the footprint to limit environmental impact or avoid any interference between mooring lines and electrical cables in a farm composed of several tens of turbines.\u0000 Those constraints may lead to designs suffering snap loads which shall be avoided as far as practicable or addressed with a particular attention, as this quasi-instantaneous stretching of the mooring lines may lead to very high tensions governing the design.\u0000 This paper presents the results of physical model tests and numerical simulations performed on a typical floating wind turbine concept of semi-submersible type. Both qualitative and quantitative comparisons are performed. The objective is to provide guidelines for FOWT mooring designers regarding the selection of the drag coefficient to consider.\u0000 A very significant influence of the line’s drag coefficient, on both the probability of occurrence and the magnitude of snap loads, was found. This subject is hereby fully documented on a given case study and general discussions on scale effects, marine growth effects and other parameters are also made.\u0000 The numerical simulations were performed using the dynamic analysis software ‘OrcaFlex’.\u0000 The experiments have been carried out by Océanide, in south of France.","PeriodicalId":23784,"journal":{"name":"Volume 6: Ocean Engineering","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77912061","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

Experimental Wave Flume Tests in ROV-Wave Interaction Effects on the Line Tension for a Work Class ROV in Splash Zone 水花区工作级ROV-波浪相互作用对线张力影响的波浪水槽试验

Volume 6: Ocean Engineering Pub Date : 2021-06-21 DOI: 10.1115/omae2021-61098

Michael Binsar Lubis, M. Kimiaei

{"title":"Experimental Wave Flume Tests in ROV-Wave Interaction Effects on the Line Tension for a Work Class ROV in Splash Zone","authors":"Michael Binsar Lubis, M. Kimiaei","doi":"10.1115/omae2021-61098","DOIUrl":"https://doi.org/10.1115/omae2021-61098","url":null,"abstract":"\u0000 Integrity and stability of Remotely Operated Vehicle (ROV) when passing through the splash zone is one of the main concerns in the design of an ROV-umbilical system. Due to the lightweight nature of ROV in water, the umbilical experiences repetitive rapid transitions between slack and taut as the ROV travels through the splash zone. These rapid transitions induce tension spikes in the umbilical, namely snap forces, that can endanger the launch and recovery of an ROV. Therefore, it is important to ensure that the tension spikes do not exceed the safe working load of the umbilical.\u0000 In this study, launch and recovery of a deep-water work class ROV are experimentally investigated using a 1:10 scaled ROV model through a series of wave flume tests. Different regular and irregular waves are generated in the flume while the ROV model is hung over the flume in four different positions. The tension time-history in the line is measured and recorded using a load cell at the top-end of the line. A simplified numerical model for launch and recovery of the ROV is developed and the numerical results are compared with the experimental ones. It is shown that the presented simplified model can be accurately used for analysis of launch and recovery of the ROV.","PeriodicalId":23784,"journal":{"name":"Volume 6: Ocean Engineering","volume":"129 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79575478","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: 1

Three-Dimensional Effects on Slamming Loads 撞击载荷的三维效应

Volume 6: Ocean Engineering Pub Date : 2021-06-21 DOI: 10.1115/omae2021-63741

Shan Wang, C. Guedes Soares

引用次数: 0

Determination of the Vertical Location of the Axis of Rotation of the Roll Motion From Full-Scale Measurements 从全尺寸测量中确定滚转运动旋转轴的垂直位置

Volume 6: Ocean Engineering Pub Date : 2021-06-21 DOI: 10.1115/omae2021-62301

L. Johnsen, S. Krüger

引用次数: 0

Optimization of Segmented Wave-Maker Control to Generate Spatially Uniform Regular Waves in a Rounded-Rectangular Wave Basin 圆矩形波池中产生空间均匀规则波的分段造波控制优化

Volume 6: Ocean Engineering Pub Date : 2021-06-21 DOI: 10.1115/omae2021-62773

Daichi Ota, H. Houtani, H. Sawada, H. Taguchi

{"title":"Optimization of Segmented Wave-Maker Control to Generate Spatially Uniform Regular Waves in a Rounded-Rectangular Wave Basin","authors":"Daichi Ota, H. Houtani, H. Sawada, H. Taguchi","doi":"10.1115/omae2021-62773","DOIUrl":"https://doi.org/10.1115/omae2021-62773","url":null,"abstract":"\u0000 A wave field in a wave basin inevitably has spatial variation due to the wave’s cylindrical propagation property. Therefore, we aimed to develop an optimization method for the control of wave-makers to produce a spatially uniform wave field in a specified test zone inside a wave basin with an arbitrary arrangement of wave-makers. The optimization is based on the simulated annealing algorithm, a method for finding a globally optimal solution, which was combined with a numerical wave basin based on linear wave-maker theory. A wave generation experiment was performed in the actual sea model basin (80 m long, 40 m wide, and 4.5 m deep) at the National Maritime Research Institute to validate the proposed optimization method. A case study was conducted with a long-crested regular-wave with a wave height of 10 cm, wavelength of 4.0 m, and wave direction of 180 degrees, which corresponds to the longitudinal direction of the wave basin. A 40-m × 14-m test zone was set in the middle of the wave basin. The experimental results with and without the proposed optimization were compared, which confirmed that the spatial uniformity of the wave field was improved, and the coefficient of variation for the wave height in the test zone decreased from 0.127 to 0.029.","PeriodicalId":23784,"journal":{"name":"Volume 6: Ocean Engineering","volume":"114 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87973820","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

Determination of Hydrodynamic Masses and Roll Periods of Ships in Shallow Water 浅水船舶水动力质量和横摇周期的测定

Volume 6: Ocean Engineering Pub Date : 2021-06-21 DOI: 10.1115/omae2021-62782

Larissa Jannsen, S. Krüger

{"title":"Determination of Hydrodynamic Masses and Roll Periods of Ships in Shallow Water","authors":"Larissa Jannsen, S. Krüger","doi":"10.1115/omae2021-62782","DOIUrl":"https://doi.org/10.1115/omae2021-62782","url":null,"abstract":"\u0000 Due to the fast increase of the vessels’ size over the past few years the actual water depth is becoming more and more relevant for seakeeping problems. The highly frequented sea route TSS Terschelling – German Bight for example is a shallow water route for large vessels which are now affected by the reduced keel clearance. Many shallow water depth areas occur also in coastal areas or inland seas. If a vessel is travelling in shallow water sea states, the hydrodynamic forces will change compared to deep water sea states and they are essential for further seaway calculations. Furthermore, a rough but easy evaluation of the incoming seaway is the roll period. Shallow water effects should be taken into account for calculating roll periods and thereby predicting a manageable or risky seaway situation. This paper presents the implementation of shallow water effects into an existing 2D panel code. With this panel code the hydrodynamic forces for the vessel’s frames are calculated based on the potential theory in the frequency domain, which is a validated approach in the early design stage. The panel code is part of the ship design environment E4 which is being developed by the Institute of Ship Design and Ship Safety, among others. With the expanded method it is possible to calculate hydrodynamic forces also in shallow water in all degrees of freedom. Therefore, the frame motions are converted to global ship motions. Furthermore, for the usage in the early design stage the calculations should be fast but also accurate. The obtained calculation results are therefore validated with full scale measurement using Inertial-Measurement-Units.","PeriodicalId":23784,"journal":{"name":"Volume 6: Ocean Engineering","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87320530","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

Effect of Air Fraction on Force Coefficients in Oscillatory Flow 振荡流动中空气分数对力系数的影响

Volume 6: Ocean Engineering Pub Date : 2021-06-21 DOI: 10.1115/omae2021-61122

M. Vested, E. D. Christensen

引用次数: 0