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Dissertations / Theses on the topic 'Mooring analysis'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Harnois, Violette. "Analysis of highly dynamic mooring systems : peak mooring loads in realistic sea conditions." Thesis, University of Exeter, 2014. http://hdl.handle.net/10871/17205.

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Marine Renewable Energy (MRE) is a promising source of energy for the future. However, it is still under development and many challenges need to be overcome to develop competitive solutions. While the design of the station keeping system of traditional offshore oil and gas structures is driven mainly by their low frequency motions, MRE devices are installed at nearshore locations and move dynamically. Because of these criteria, MRE mooring systems require novel mooring systems and associated standards. MRE mooring standards need to take into account the highly dynamic behaviour of these system

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2

Girija, Sasidharan Pillai Harish. "Analysis of coupled body mooring and fender system." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2608.

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The hydrodynamic excitation and response behavior of multi-body systems with varying degrees of coupling presents many challenges for designers of offshore structures. In this study, attention is focused upon the analysis and interpretation of experimental data obtained for an unmanned deepwater mini-Tension Leg Platform (mini-TLP) coupled to a tender barge. Each body has its own mooring system and the bodies are connected by two breast lines extending from central points on the mini-TLP to central points on the bow and stern of the tender barge. A fender system is located between the two plat

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3

Keshavarz, Leila. "Analysis of Mooring System for a Floating Production System." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15823.

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Understanding the behavior of a mooring line that is connected to a Suezmax vessel is a crucial requirement for our industry. Thus, we should model and analyze such a mooring line under a variety of environmental conditions. The output of modeling and analysis are useful to determine if the given mooring line is suitable for that environment or not. In the first part of this project a brief description about floating production platforms and mooring systems has been given and different material used for mooring systems has been discussed. All loads acts on mooring systems have been described a

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4

Yang, Woo Seuk. "Hydrodynamic analysis of mooring lines based on optical tracking experiments." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-3273.

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5

Paton, Alan G. "The analysis of fatigue and mechanical properties of mooring tethers." Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325444.

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6

SILVEIRA, EDUARDO SETTON SAMPAIO DA. "DYNAMIC ANALYSIS OF MOORING LINES USING TIME ADAPTIVITY AND SUBCYCLING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2001. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=2078@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>O custo computacional requerido nas simulações de problemas em dinâmica estrutural em geral é muito alto. Em determinadas situações é necessária a obtenção de respostas imediatas a fim de que sejam tomadas decisões importantes com base nessas respostas. Em outras situações existe a necessidade de se fazer várias simulações de um mesmo problema variando alguns poucos parâmetros entre elas. Estas situações são muito comuns em problemas envolvendo a análise dinâmica de linhas de ancoragem que é objeto de estudo deste trabal

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7

Ong, Paul Pang Awn. "Modelling seabed interaction in frequency domain analysis of mooring cables." Thesis, University of Cambridge, 2004. https://www.repository.cam.ac.uk/handle/1810/272080.

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8

Mays, Timothy Wayne Jr. "Three-Dimensional Analysis of Moored Cylinders Used as Breakwaters." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/35750.

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For oblique and normal water waves at various frequencies, the use of moored cylinders as breakwaters is considered numerically using linear three-dimensional analysis. The breakwater can be used by itself for protection of small structures or as a series of cylinders to protect a harbor, shoreline, or moored vessel from the destructive energy associated with incident water waves. The breakwater is completely submerged below the free surface and is attached to the ocean floor with six symmetrically configured mooring lines. The cylinder is filled with air and the mooring lines remain taut d

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9

Hordvik, Tore. "Design analysis and optimisation of mooring system for floating wind turbines." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15571.

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Lately, focus is put on renewable energy resources as the environmental concerns regarding exploitation of hydrocarbons are increasing. The enormous energy potential found in offshore wind fields is proposed utilized by installing floating wind turbines in interconnected wind farms. As for all other floating structures operating within a limited area, stationkeeping is needed in order to keep the motions of the floating structure within permissible limits. In this study, methods for selecting and optimising the mooring system for floating wind turbines in shallow water are investigated. The de

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10

Ba, Umaru Muhammad. "Analysis of mooring and steel catenary risers system in ultra deepwater." Thesis, University of Newcastle Upon Tyne, 2012. http://hdl.handle.net/10443/1420.

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With the gradual depletion of oil and gas resources onshore as well as shallow offshore waters, oil exploration is gradually moving deeper into the seas. One of the major means of oil exploration at such locations is by way of Floating Production Storage and offloading (FPSO) system. Because of the ever increasing depths of exploration and the prevailing harsh environmental conditions, there is a need to constantly re-evaluate or develop new methods for mooring system and riser analyses. There are several methods available which are well tested for the analysis of systems operating in shallow

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11

Kim, Young-Bok. "Dynamic analysis of multiple-body floating platforms coupled with mooring lines and risers." Diss., Texas A&M University, 2004. http://hdl.handle.net/1969.1/552.

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A computer program, WINPOST-MULT, is developed for the dynamic analysis of a multiple-body floating system coupled with mooring lines and risers in the presence of waves, winds and currents. The coupled dynamics program for a single platform is extended for analyzing multiple-body systems by including all the platforms, mooring lines and risers in a combined matrix equation in the time domain. Compared to the iteration method between multiple bodies, the combined matrix method can include the full hydrodynamic interactions among bodies. The floating platform is modeled as a rigid body wit

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12

Baker, Joshua L. "Mooring Analysis of the Ocean Sentinel through Field Observation and Numerical Simulation." Thesis, Oregon State University, 2013. http://hdl.handle.net/10945/43474.

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CIVINS<br>Mooring systems are used to secure offshore structures to the ocean floor. They can provide general station-keeping, where a ship, buoy, or platform is kept in a general location. They can also provide more finite positioning, where heading, draught, elevation, and GPS coordinates are tightly controlled. The behavior of a mooring system depends greatly on its configuration and components, which is discussed in more detail in this section. There are two major organizations that produce mooring system specifications: Det Norske Veritas (DNV) and the American Petroleum Ins

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13

PASSIONE, BIAGIO. "Hydrodynamic analysis and mooring design of a floating pitching Wave Energy Converter." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2714195.

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The work presented in this thesis is part of an integrated research carried out for the development of the ISWEC technology. The key aspects of this WEC that can experience relevant improvement for the technology design and optimization are found to be hydrodynamics modelling and mooring design. These two topics are investigated in order to achieve a high reliability numerical tool for the performance analysis and testing of the ISWEC device. The existing numerical model has been upgraded and validated against experimental results, introducing non-linear phenomena. A mooring system has

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14

Perwitasari, Ratna Nita. "Hydrodynamic interaction and mooring analysis for offloading between FPSO and LNG shuttle tanker." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11668.

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15

Wikberg, Sofia, and Elin Wikström. "Farligt förtöjningsarbete : Analys av förtöjningsolyckor." Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-58054.

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Förtöjningsarbete är ett rutinarbete ombord på de flesta fartyg vid ankomster och avgångar men det är även sett som ett riskfyllt arbete med olyckor till följd. Syftet med det här examensarbetet är att undersöka varför det fortätter ske allvarliga olyckor i samband med förtöjning trots att det är ett rutinjobb. Genom att göra dokumentanalys av olycksfallsrapporter med hjälp av analysmodellen HFACS-MA har 24 olycksfallsrapporter analyserats. Modellen är framtagen som en ram för mänskliga och organisatoriska orsaker och faktorer. Faktorerna från rapporterna placerades i fem olika nivåer. Resulta

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16

Karimirad, Madjid. "Stochastic Dynamic Response Analysis of Spar-Type Wind Turbines with Catenary or Taut Mooring Systems." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-12458.

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Floating wind turbines can be the most practical and economical way to extract the vast offshore wind energy resources at deep and intermediate water depths. The Norwegian Ministry of Petroleum and Energy is strongly committed to developing offshore wind technology that utilises available renewable energy sources. As the wind is steadier and stronger over the sea than over land, the wind industry recently moved to offshore areas. Analysis of the structural dynamic response of offshore wind turbines subjected to stochastic wave and wind loads is an important aspect of the assessment of their po

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17

Gao, Zhen. "Stochastic Response Analysis of Mooring Systems with Emphasis on Frequency-domain Analysis of Fatigue due to Wide-band Response Processes." Doctoral thesis, Norwegian University of Science and Technology, Department of Marine Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2020.

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<p>Mooring systems are widely used in the offshore industry to limit the horizontal excursions of a floating structure from desired position in order for the structure to fulfill the required tasks. Safety of mooring systems is therefore crucial for successful marine operations.</p><p>Under the environmental actions of waves, wind and current, large dynamic tension in mooring lines can be excited at both wave frequency (WF) and low frequency (LF). Due to the nonlinearities of environmental loads and mooring systems, both WF and LF tension are non-Gaussian random processes. In this thesis, stoc

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18

Peterson, Scott Thomas. "Experimental response and analysis of the Evergreen Point Floating Bridge." Connect to this title online, 2002. http://www.dissertations.wsu.edu/dissertations/Fall2002/s%5Fpeterson%5F102102.pdf.

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19

Balbastre, Camarena Borja. "Fatigue Analysis of Mooring Lines in Floating Bridges : Influence of Line Configuration and Water Depth in a Case Study in Bjørnafjorden." Thesis, KTH, Bro- och stålbyggnad, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209936.

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Nowadays, the Norwegian Public Roads Administration plans to replace the ferry connections along the western coast of Norway with fixed road connections through the coastal highway E39 project. Due to the necessity of bridging long distances with considerable depths, non-conventional engineering solutions are being developed. To date, the first fjord planned to be cross is Bjørnafjord, located just in the middle of Trondheim and Kristiansand. In order to bridge the fjord distance, three innovative solutions have been developed: a submerged floating tube bridge, a floating pontoon bridge, and f

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20

Petreche, João Roberto Diego. "Análise probabilística do comportamento dinâmico de linhas de amarração." Universidade de São Paulo, 1991. http://www.teses.usp.br/teses/disponiveis/3/3135/tde-04072017-081358/.

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Os aspectos estatísticos inerente à excitação provocada pelas condições ambientais sobre embarcações amarradas são estudados de forma a estabelecer parâmetros aceitáveis para avaliação da qualidade da resposta dinâmica não-linear de longo prazo das linhas de amarração, em termos de vida em fadiga e do risco de ruptura estática. A abordagem proposta subdivide a resposta de longo prazo numa sequência de eventos de curto prazo, nos quais o processo aleatório é considerado estacionário, embora não necessariamente de banda estreita. Nesses termos, o comportamento dinâmico não-linear das linhas de a

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21

Cueva, Marcos Salles. "Estudo de VIM - Movimentos Induzidos por Vórtices em plataformas do tipo monocoluna: abordagem numérico-experimental e impactos no sistema de amarração." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3135/tde-31052011-162748/.

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A vibração induzida por vórtices - VIV é um assunto muito estudado na engenharia oceânica, tendo seu nome adaptado para VIM por ocasião de observação semelhante em plataformas do tipo Spar no Golfo do México. Com o início da utilização de plataformas monocolunas, especificamente com a instalação da Sevan Piranema no Nordeste Brasileiro, em 2007, questionou-se sobre a ocorrência deste fenômeno nestas unidades de seção cilíndricas, aplicando cargas não previstas aos sistemas de ancoragem, e eventualmente tornando estes subdimensionados. Em um primeiro momento, foi realizado estudo detalhado sobr

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22

Lin, Zi. "A hydrodynamic analysis of deep-water moorings." Thesis, University of Strathclyde, 2015. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=24940.

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The move by the offshore oil & gas industry to deep water has an impact on the selection of mooring system configuration and design method. Methods of analysis need to be re-evaluated as water depth increases. The primary purpose of this thesis is to study the hydrodynamics of deep water moorings and the nonlinear dynamic response of the mooring line, which is representative of a Spar platform and a floating offshore wind turbine (FOWT). Emphasis is placed on the coupling effects between the floating body and mooring line and the nonlinear dynamic response of elastic mooring line. For a Spar p

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23

Thies, Philipp Rudolf. "Advancing reliability information for Wave Energy Converters." Thesis, University of Exeter, 2012. http://hdl.handle.net/10036/4053.

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Marine renewable energy promises to provide a significant contribution to the future electricity supply. It is estimated that 17% of today's UK electricity demand could be generated from wave and tidal sources. The ambition to harvest this resource is in the public interest, as it eases the pressures on energy security, holds the potential to reduce carbon emissions and has the prospect to create a new UK industry sector worth £15 billion. From an engineering perspective, marine energy is one of the least developed renewable energy technologies and has to be regarded as unproven. The reliabili

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24

Bradon, Jill Elizabeth. "Wire rope terminations and their influence on the reliability of offshore moorings." Thesis, University of Reading, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343175.

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25

Ha, Tai Pil. "Frequency and time domain motion and mooring analyses for a FPSO operating in deep water." Thesis, University of Newcastle Upon Tyne, 2011. http://hdl.handle.net/10443/1306.

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An investigation on the motion responses of a Floating Production, Storage and Offloading (FPSO) vessel moored in irregular waves has been carried out based on both frequency- and time-domain approaches. In the frequency-domain approach a three-dimensional panel method was employed in order to calculate the first-order hydrodynamic forces and moments such as added masses, potential damping and wave excitation forces and moments and of the resulting the first-order motions and mean second-order forces and moments on the vessel in six degrees of freedom behaviour. A spectral analysis was carried

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26

莊炳燦. "Dynamic Analysis of Cage Aquacultural Mooring System." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/84585920765741022998.

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碩士<br>國立中山大學<br>海洋環境工程研究所<br>85<br>A two-dimensional time-domain lumped parameter model for predicting the dynamic responses of cage aquacultural mooring system in an ocean environment is presented. Numerical integration techniques of fifth-order Runge-Kutta-Cash-Karp method is employed in the time stepping procedure. Numerical analysis consists of determining the tether tensions and the motions of mooring cage. Laboratory experiments with cage mooring system model have been made to determine the drag force necessary to describe the cage motions in the numerical model. Tensions and motions

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27

Pan, Jen-Ya, and 潘仁雅. "Study on structural improvement and mooring line fatigue risk analysis for a single point mooring system." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/2u9s8b.

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碩士<br>國立中山大學<br>海洋環境及工程學系研究所<br>95<br>The purpose of this report is not only to improve the cage volume deformation problem during typhoon attack but also to perform the risk analysis for a single-point-mooring (SPM) net cage system when employed in the open sea. This SPM cage system has advantages over the traditional multi-mooring lines cage system, especially when the water depth is deeper than 50m, which may prohibit divers from checking the security of anchors as well as installing the mooring system at a precise position due to the difficulty in deploying anchors in the deep and restless

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28

Lih-FuTu and 涂力夫. "Dynamic Analysis of Mooring Cables inNonlinear Water Waves." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/82934950056208938074.

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29

Zheng, Zheng-Yu, and 鄭正裕. "Response of undersea mooring system— analysis and visualization." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/42231212823272455191.

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碩士<br>國立臺灣海洋大學<br>河海工程學系<br>92<br>This thesis is concerned with the problem of predicting the motion of an articulated tower and cable subjected to noncollinear wave and current. Considering the structure as a spherical pendulum, Lagrange’s form of D’Alembert principle is employed to develop an analysis procedure. In this approach, dynamic fluid loadings varying along the entire length of the structure are integrated numerically and transformed into the genertlized active forces. Runge-Kutta method is used to solve these nonlinear differential equation. Both the transient and the steady state

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30

Chang-Chien, Hung-Hsun, and 張簡宏勛. "Design and Analysis of Mooring System for Current Generator." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/50812157383280799779.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>97<br>For the exploitation of the huge ocean energy, development of Kuroshio current generator network system may be a chance for Taiwan. One of the biggest challenges of the ocean energy technology is how to moor the generators on the deep sea and resist the strong currents to keep them in right positions. This study explores different mooring systems for a pilot marine current power plant of 10MW located at 5km off shore. The feasibility of the design and construction of a mooring system for a current power generator of 1GW installed on a sea area of 25 squar

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31

Huang, Sheng-Hsiang, and 黃聖翔. "Analysis of Mooring Line Tension for a Floating Current Turbine." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/46269198321973099541.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>101<br>In order to harvest Kuroshio Current energy, anchoring and mooring technology of floating marine current turbines is one of the key challenges. A floating marine current turbine needs to float stably at a proper depth for generating power steady, and also needs to go up to the surface for maintenance, or even to go down deeper to avoid the influence of waves caused by Typhon. Therefore, in addition to rotor and nacelle for harvesting energy, it may look similar to an underwater vehicle with a fuselage for offering static buoyancy, wing and control surfac

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32

Martinez, Farfan Jose Alberto. "Modal Analysis of Deepwater Mooring Lines Based on a Variational Formulation." Thesis, 2013. http://hdl.handle.net/1969.1/149500.

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Previous work on modal analysis of mooring lines has been performed from different theoretical formulations. Most studies have focused on mooring lines of a single homogeneous material, and the effect of added mass and damping produced by the water has not been examined deeply. The variational formulation approach, employed in this research to perform a modal analysis, has been useful to study the behavior of several realistic mooring lines. The cases presented are composed from segments of materials with different mechanical characteristics, more similar to those in current offshore projects

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33

Xiao, Zhi-Jie, and 蕭志傑. "Design and analysis of single point mooring offshore natural gas storage." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/6rvc2n.

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碩士<br>國立臺灣大學<br>應用力學研究所<br>106<br>Due to the promotion of environmental protection policies, traditional power plants use natural gas to replace coal-fired power generation, the demolition of nuclear power plant, etc., making Taiwan''s use of natural gas gradually increase in recent years. According to the statistics of the Energy Bureau, Taiwan’s consumption of natural gas has averaged 10.47% annual growth rate from 1996 to 2016, and natural gas in Taiwan is mainly imported from abroad, the construction of natural gas storage facilities is one of the existing problems. Recent years,

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Wu, Jo-Ti, and 吳若禔. "Dynamic Analysis of Mooring Line System for an Ocean Current Turbine." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/rfa5mm.

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碩士<br>國立臺灣海洋大學<br>系統工程暨造船學系<br>106<br>In Taiwan, the development of Kuroshio Energy is an important issue. At present, Taiwan has developed ocean current turbines. How to make ocean current turbines operate stably under water in the harsh environment around Taiwan is the core technology of ocean current energy development. In this study, the Floating Kuroshio Turbine system which developed by National Taiwan University and National Taiwan Ocean University is used as a model to explore the dynamic balance and motion state of the unit under different anchor chain systems. Several commercial soft

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Li, Chengxi. "Coupled Analysis of the Motion and Mooring Loads of a Spar "CONSTITUTION"." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11487.

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A truss spar, named as 'Constitution' was installed in Gulf of Mexico located at 90.58' 4.8" West Longitude and 27.17'31.9" North Latitude. Since its installation in October 2006, it has weathered multiple hurricanes. After the installation, British Maritime Technology (BMT) installed an Environmental Platform Response Monitoring System (EPRMS). The EPRMS is an integrated system collecting myriad of data that include the significant wave height and peak period of waves, the magnitude and direction of current and wind in the vicinity of the truss spar, its six-degree of freedom (6-D) motions, a

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36

Yuk, Dongjun. "Stochastic analysis of the nonlinear response transition behavior of an ocean system." Thesis, 2001. http://hdl.handle.net/1957/33222.

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The nonlinear response of an ocean system subjected to random excitations can exhibit very complex dynamic behaviors including jump phenomena and coexistence of attractors. In this study, the stochastic system response behavior of a simple (Duffing) oscillator under narrow-band random excitations is first examined in the subharmonic resonance region. A semi-analytical procedure based on the nonlinear response characteristics of the corresponding deterministic system is developed to derive the response transition probabilities within individual attraction domains and among finite attraction dom

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37

Gurumurthy, K. "Dynamic analysis and reliability of mooring lines for deep water floating systems." Thesis, 2009. http://localhost:8080/xmlui/handle/12345678/3016.

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38

Lee, Ming-Feng, and 李明峯. "Dynamic Analysis of a Single-point-mooring Floating Platform for Current Power Generator." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/44921347334845480015.

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碩士<br>國立中山大學<br>海洋環境及工程學系研究所<br>101<br>In the past, human activities usually rely on the fossil fuel to provide the energy for the mechanical operations or industries development. In recent years, the trend of gradually diminishing fossil fuel has sparked the unstable social economic problems for some countries relying on imported energy, and also the overuse of these traditional fuel directly increase the severity of greenhouse effect and other issues of environment pollution. Worsen by those serious pollution issues, many countries are engaging in searching for renewable energy resources to

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39

Kim, Young-Bok. "Dynamic analysis of multiple-body floating platforms coupled with mooring lines and risers." 2003. http://hdl.handle.net/1969/552.

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Shih, Po-Yun, and 施博雲. "The Dynamic Analysis of A Mooring Floating Bridge due to A Moving Load." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/36059768786582440837.

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碩士<br>國立成功大學<br>造船工程學系<br>82<br>The natural frequencies and mode shapes,and the coupled rigid- body (rolling) motion and elastic (flexural and torsional) vibration of a partial-catenary-moored floating bridge (in still water) subjected to a moving load are investigated. The mathematical model is obtained by simplifying one of the floating bridges in Lake Washington at Seattle, U.S.A.. For deriving the element mass matrix and stiffness matrix,the bridge is considered to be an elastic body su

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Chi, Chao-Ming. "Plastic Limit Analysis of Offshore Foundation and Anchor." 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8452.

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This study presents the applications of plastic limit analysis to offshore foundations and anchors, including the drag embedment anchors (DEAs) for mobile offshore drilling units (MODU’s) and spudcan foundations for jack-up platforms. In deep waters, drag embedment anchors are an attractive option for mooring of semisubmersible platforms due to low installation cost and high holding capacity; on the other hand, jack-up platforms are more stable than semisubmersible platforms but only can be placed in shallow waters. The analyses of anchor capacities are developed for an idealized anchor compri

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Peng, Yong-Geng, and 彭詠耕. "Analysis on Nonlinear Responses of a Mooring Ship System under the Action of Environmental Forces." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/38375366991432663651.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>96<br>In the present study, a numerical model is developed for simulating the dynamic responses of a mooring ship system under the action of waves and winds. In the mooring system, a mooring ship, elastic catenary mooring lines and elastic fenders are considered. A linear strip method is applied to formulate the 6-DOF ship motions, but the interacting nonlinear forces of the mooring lines and fenders make the equations of motion nonlinear and have to be solved in time domain step by step. A series of numerical simulation has been conducted for investigating the

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Eom, Taesung. "Assessment of Global Buckling and Fatigue Life for Steel Catenary RIser by Hull-Riser-Mooring Coupled Dynamic Analysis Program." Thesis, 2013. http://hdl.handle.net/1969.1/150972.

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Steel Catenary Riser (SCR) is a popular solution for a floating production facility in the deep and ultra-deep ocean. In the analysis of SCR, the behavioral characteristics are investigated to check the failure modes by assessing the magnitude and the frequency of the stress and strain which SCR goes through in time series. SCR is affected by the motions of connected floating production facility and exciting environmental loads. The driven force and motion of SCR has an interaction with seabed soil which represents the stiffness and friction force where SCR touches the seabed. Dynamic response

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Bae, Yoon Hyeok. "Loads on Tie-Down Systems for Floating Drilling Rigs during Hurricane Conditions." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-691.

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Tie-down systems are used to fasten drilling rigs to the deck of offshore structures during harsh environmental conditions such as hurricanes. During Hurricane Ivan (2004) and Katrina (2005), a number of offshore structures were moved and several tie-down systems were damaged. In the present study, the reaction force and connection capacity of tie-down systems for a TLP and SPAR are investigated. The environmental conditions are taken from the API Bulletin 2INT-MET which has been updated after several major storms during 2004-2005. The hydrodynamic coefficients of the TLP and SPAR are obtained

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Bae, Yoon Hyeok. "Coupled Dynamic Analysis of Multiple Unit Floating Offshore Wind Turbine." Thesis, 2013. http://hdl.handle.net/1969.1/149465.

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In the present study, a numerical simulation tool has been developed for the rotor-floater-tether coupled dynamic analysis of Multiple Unit Floating Offshore Wind Turbine (MUFOWT) in the time domain including aero-blade-tower dynamics and control, mooring dynamics and platform motion. In particular, the numerical tool developed in this study is based on the single turbine analysis tool FAST, which was developed by National Renewable Energy Laboratory (NREL). For linear or nonlinear hydrodynamics of floating platform and generalized-coordinate-based FEM mooring line dynamics, CHARM3D program, h

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Elhanafi, ASSM. "Performance and survivability of offshore oscillating water column wave energy converters." Thesis, 2017. https://eprints.utas.edu.au/23971/2/Elhanafi_whole_thesis_ex_pub_mat.pdf.

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This research was performed with a focus on two key aspects of energy cost–reduction for offshore OWC devices; improving the power extraction efficiency and reducing the excess margin in structural safety factors by a better understanding of wave–induced loads on these devices. This study utilised information from three different resources. First, 2D and 3D numerical results from fully nonlinear Computational Fluid Dynamics (CFD) simulations performed using the commercial code STAR–CCM+ that was validated in good agreement with physical scale model measurements at each stage of increasing comp

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Mohd, Umair. "Dynamic motion analysis of spar plantform and reliability assessment of its moorning systems." Thesis, 2012. http://localhost:8080/iit/handle/2074/6646.

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