Dissertations / Theses on the topic 'Ship'
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1
Yeung, Tat-chuen. "The Hong Kong shipping register : past, present and future /." [Hong Kong] : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13762217.
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Bassham, Bobby A. "An evaluation of electric motors for ship propulsion." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FBassham.pdf.
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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, June 2003.Thesis advisor(s): Robert Ashton, Todd Weatherford. Includes bibliographical references (p. 93-96). Also available online.
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Kumar, Ramesh. "Defense of surface ships against anti ship missiles." Thesis, Monterey, California. Naval Postgraduate School, 1990. http://hdl.handle.net/10945/28092.
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This thesis discusses the Anti-Ship Missile problem and explores the various options available for countering the Anti-Ship Missile. Special emphasis has been given to the chaff solution for defeating the Anti-Ship Missile. A program has been written to enable the testing of the effectiveness of the medium range and close range chaff deployed in conjunction with various conditions of wind and various ship's courses. The program can be used to determine the best solution for deploying the medium range chaff given the known parameters such as detection ranges and probable wind conditions. The program was run with medium range chaff deployed in the default position and the wind's course was varied through 180 degrees. For each of the courses of the wind 3 wind speeds were tried. The ship's course was also varied through 360 degrees for each of the winds courses in 45 degree steps. The seduction chaff was automatically deployed by the program
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Kamur, Ramesh. "Defense of surface ships against anti ship missiles /." Monterey, California : Naval Postgraduate School, 1990. http://edocs.nps.edu/npspubs/scholarly/theses/1990/Sep/09Sep%5FKumar.pdf.
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Thesis (M.S. in Systems Engineering (Electronic Warfare))--Naval Postgraduate School, September 1990.Thesis Advisor(s): Milne, Edmund A. Second Reader: Cooper, Alfred W. M. "September 1990." Description based on title screen as viewed on March 18, 2010. Author(s) subject terms: Anti-Ship Missiles, Seduction mode, Distraction mode, Soft kill, Hard kill. Includes bibliographical references (p. 110).
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Colgary, Katherine A. Willett Devon K. "Ship and installation program optimal stationing of Naval ships /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Jun%5FColgary.pdf.
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Thesis (M.S. in Applied Science (Operations Research))--Naval Postgraduate School, June 2006.Thesis Advisor(s): Robert F. Dell and William J. Tarantino. "June 2006." Includes bibliographical references (p. 47-48). Also available in print.
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Daqaq, Mohammed F. "Virtual Reality Simulation of Ships and Ship-Mounted Cranes." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/32305.
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We present a virtual simulation of ships and ship-mounted cranes. The simulation is carried out in a Cave Automated Virtual Environment (CAVE). This simulation serves as a platform to study the dynamics of ships and ship-mounted cranes under dynamic sea environments and as a training platform for ship-mounted crane operators. A model of the (Auxiliary Crane Ship) T-ACS 4-6 was built, converted into an OpenGL C++ API, and then ported into the CAVE using DiverseGL (DGL). A six-degrees-of-freedom motion base was used to simulate the actual motion of the ship. The equations of motion of the ship are solved using the Large Amplitude Motion Program (LAMP), while the equations of motion of the crane payload are numerically integrated; the interaction between the payload and the ship is taken into consideration. A nonlinear delayed-position feedback-control system is applied to the crane and the resulting simulation is used to compare the controlled and uncontrolled pendulations of the cargo. Our simulator showed a great deal of realism and was used to simulate different ship-motion and cargo transfer scenarios.
This work received support from the Office of Naval Research under Grant No. N00014-99-1-0562.Master of Science
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Willett, Devon K. "Ship and installation program optimal stationing of Naval ships." Thesis, Monterey California. Naval Postgraduate School, 2006. http://hdl.handle.net/10945/2768.
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.2 billion in savings. We also investigate the influence of using two different measures of pier capacity and incorporate 30 new ships and submarines to demonstrate SHIP's ability to station the proposed future force structure.US Navy (USN) author.
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Souhan, Brian E. "Closed loop control of a cascaded multi-level converter to minimize harmonic distortion." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Jun%5FSouhan.pdf.
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Sarch, Martin G. "Fin stabilizers as maneuver control surfaces." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FSarch.pdf.
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Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, December 2003.Thesis advisor(s): Fotis A. Papoulias, Charles N. Calvano. Includes bibliographical references (p. 111-112). Also available online.
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Sen, Sharma Pradeep Kumar. "Sensitivity analysis of ship longitudinal strength." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/45183.
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The present work addresses the usefulness of a simple and efficient computer program (ULTSTR) for a sensitivity analysis of ship longitudinal strength, where this program was originally developed for calculating the collapse moment. Since the program is efficient it can be used to obtain ultimate strength variability for various values of parameters which affects the longitudinal strength, viz., yield. stress, Young's modulus, thickness, initial imperfections, breadth, depth, etc.
The results obtained with this approach are in good agreement with those obtained by use of a more complex nonlinear finite element program USAS, developed by American Bureau of Shipping.Master of Science
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Mermiris, Georgios Apostolou. "A risk-based design approach to ship - ship collision." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=12405.
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Lindsay, K. W. "Secondary radar, collision avoidance and ship-to-ship communication." Thesis, Liverpool John Moores University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332121.
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Waller, Brian S. "Development of a Quantitative Methodology to Forecast Naval Warship Propulsion Architectures." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/2000.
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This paper is an investigation into a quantitative selection process of either a mechanical or electrical system architecture for the transmission of propulsion power in naval combatant vessels. A database of historical naval ship characteristics was statistically analyzed to determine if there were any predominant ship parameters that could be used to predict whether a ship should be designed with a mechanical power transmission system or an electric one. A Principal Component Analysis was performed to determine the minimum number of dimensions required to define the relationship between the propulsion transmission architecture and the independent variables. Combining the results of the statistical analysis and the PCA, neural networks were trained and tested to separately predict the transmission architecture or the installed electrical generation capacity of a given class of naval combatant.
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Turner, Grace Sandrena Rosita. "Bahamian ship graffiti." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1339.
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The Bahamian archipelago covers over 5,000 square miles of the Atlantic Ocean at the northwestern edge of the Caribbean Sea. In the Age of Sail, from the late 15th to early 20th centuries, these islands were on major sailing routes between the Caribbean, Central America, and Europe. Bahamians developed life-ways using their islands location to their advantage.
Archaeological evidence of the significance of shipping activity is quite lacking. This research aimed to help fill the void by documenting examples of ship graffiti throughout the Bahamas. Examples of ship graffiti were documented with photographs and tracings. The Bahamian examples all date to the 19th and 20th centuries, 100 years later than other examples from the Caribbean and North America. They are also unique in being incised into the stone surfaces of building walls, caves, stones on a hillside, even on a slate fragment. It is possible that ship graffiti were also engraved on wooden surfaces but these have not survived in the archaeological record. Images depict locally-built vessels such as sloops and schooners as well as larger, ocean-going vessels.
Ship graffiti are at sites associated mainly with people of African heritage, another possible social grouping being persons of lower economic status. Graffiti details consistently indicate that the artists were familiar with ship construction and rigging.
This analysis of ship graffiti gives some understanding of the significance of ships and shipping in the Bahamian economy.
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Avgouleas, Kyriakos. "Optimal ship routing." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44861.
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Thesis (Nav. E. and S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.Includes bibliographical references (p. 114-118).
Fuel savings in ship navigation has always been a popular subject in the maritime industry as well as the world's largest Navies. Oil prices and environmental considerations drive the effort for more fuel-efficient navigation. This thesis addresses the problem of deterministic minimum fuel routing by applying optimal control theory in conjunction with state of the art hydrodynamic and weather forecasting tools. A fictitious trans-Atlantic route is established and the optimal combination of speed and heading is determined, so that fuel consumption is minimized while certain safety constraints are met. The safety constraints are defined as the probabilities of slamming and deck wetness, both of which are not allowed to exceed prescribed limiting values. The problem formulation adopted in the thesis lies in the framework of Dynamic Programming, which is most suitable for computer implementation. The hydrodynamic performance of the ship is computed through the use of SWAN1, an advanced frequency domain CFD code. With the aid of SWAN1, ship motions and resistance can be accurately calculated. The latter includes the estimation of mean added resistance in waves, which has a major effect on the fuel consumption of ships sailing in rough seas. Wave and swell forecasts are provided in a deterministic setting by a third generation numerical wave model, the WAM cycle 4, developed at the European Center for Medium-Range Weather Forecasts (ECMWF). Utilizing the hydrodynamic results and the output of the wave model a computer program is developed in MATLAB®, which employs the Iterative Dynamic Programming algorithm to solve the optimal control problem.
by Kyriakos Avgouleas.
Nav.E.and S.M.
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Robinson, Anthony David. "Ship target recognition." Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/9229.
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Includes bibliographical references.In this report the classification of ship targets using a low resolution radar system is investigated. The thesis can be divided into two major parts. The first part summarizes research into the applications of neural networks to the low resolution non-cooperative ship target recognition problem. Three very different neural architectures are investigated and compared, namely; the Feedforward Network with Back-propagation, Kohonen's Supervised Learning Vector Quantization Network, and Simpson's Fuzzy Min-Max neural network. In all cases, pre-processing in the form of the Fourier-Modified Discrete Mellin Transform is used as a means of extracting feature vectors which are insensitive to the aspect angle of the radar. Classification tests are based on both simulated and real data. Classification accuracies of up to 93 are reported. The second part is of a purely investigative nature, and summarizes a body of research aimed at exploring new ground. The crux of this work is centered on the proposal to use synthetic range profiling in order to achieve a much higher range resolution (and hence better classification accuracies). Included in this work is a comprehensive investigation into the use of super-resolution and noise reducing eigendecomposition techniques. Algorithms investigated include the Principal Eigenvector Method, the Total Least Squares Method, and the MUSIC method. A final proposal for future research and development concerns the use of time domain averaging to improve the classification performance of the radar system. The use of an iterative correlation algorithm is investigated.
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Collins, Julie. "Ship of Fools." Thesis, University of Ballarat, 2008. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/68152.
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The Ship of Fools is an ancient allegory that has long been a part of Western culture in literature, art and song... It has been chosen by many to comment on contemporary issues throughout history, highlighting the foibles of that society. The ship of fools however is also about our world, as a vessel, full of passengers of humanity, full of those who have no care what they do or where they are going... It is the 21st Century and we are all sailing on a Ship of Fools. We consume beyond reason, we want, and get the latest, newest, biggest things. We complain about interest rates and petrol prices, but consume beyond reason often with purchases on credit we don't really need.Master of Arts (Visual Arts)
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Collins, Julie. "Ship of Fools." University of Ballarat, 2008. http://innopac.ballarat.edu.au/record=b1508425.
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The Ship of Fools is an ancient allegory that has long been a part of Western culture in literature, art and song... It has been chosen by many to comment on contemporary issues throughout history, highlighting the foibles of that society. The ship of fools however is also about our world, as a vessel, full of passengers of humanity, full of those who have no care what they do or where they are going... It is the 21st Century and we are all sailing on a Ship of Fools. We consume beyond reason, we want, and get the latest, newest, biggest things. We complain about interest rates and petrol prices, but consume beyond reason often with purchases on credit we don't really need.Master of Arts (Visual Arts)
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Yeung, Tat-chuen, and 楊達存. "The Hong Kong shipping register: past, present and future." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31964667.
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Ward, Peter W. "Optimizing ship-to-shore movement for Hospital Ship humanitarian assistance operations." Thesis, Monterey, Calif. : Naval Postgraduate School, 2008. http://bosun.nps.edu/uhtbin/hyperion-image.exe/08Mar%5FWard.pdf.
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Thesis (M.S. in Operations Research)--Naval Postgraduate School, March 2008.Thesis Advisor(s): Salmeron, Javier. "March 2008." Description based on title screen as viewed on May 16, 2008. Includes bibliographical references (p. 59-60). Also available in print.
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Ronny, Ang Toon Yiam. "Link Performance Analysis of a Ship-to-Ship Laser Communication System." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/6761.
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The benefits of high data rates, high directionality, low sidelobes, small size, light weight, and low power of laser communications (lasercom) as compared to radio frequency (RF) communications make laser an attractive option for ship-to-ship communications. The realization of the option requires ship-to-ship lasercom system design and mission planning, which, in turn, necessitates a lasercom link budget analysis and a parametric analysis of lasercom system design and operational parameters. The link budget analysis determines whether the energy of a laser signal is adequately transmitted to a receiver. The parametric analysis determines the lasercom system design and operational parameters that meet ship-to-ship lasercom requirements. Maritime environmental conditions (atmospheric and water surface conditions) that affect lasercom link budget are investigated. The link budget takes into consideration transmitted and received power, gains, propagation losses, and implementation losses. The results of the link budget analysis and the parametric analysis can be used to analyze and trade the design and operational parameters contributing to a link budget that meets communications requirements and to gain understanding of the operational boundaries and limitations of lasercom.
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Piperakis, A. S. "An integrated approach to naval ship survivability in preliminary ship design." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1399992/.
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Alongside deploying weapons and sensors what makes a warship distinct is survivability, being the measure that enables a warship to survive in a militarily hostile environment. The rising cost of warship procurement, coupled with declining defence budgets, has led to a reduction in the number of ships in most western navies. Moreover, cost cutting is often aimed at aspects which may be difficult to quantify, such as survivability, and can lead to potentially inadequate designs. Innovation in both the design process and the design of individual ships is, therefore, necessary, especially at the crucial early design stages. Computer technology can be utilised to exploit architecturally orientated preliminary design approaches which can address innovation early in the ship design process and in issues such as survivability. A number of survivability assessment tools currently exist; however, most fail to integrate all survivability constituents (i.e. susceptibility, vulnerability and recoverability), in that they are unable to balance between the component aspects of survivability. Some are qualitative, therefore less than ideal for requirement specification, others are aimed towards the detailed design stages where implementing changes is heavily constrained or even impractical. Since a ship’s survivability is dependent on layout, the approach adopted in this research takes advantage of an architecturally orientated ship design approach applicable to early stage design. Such a method is proposed and demonstrated on five combatant (including a trimaran configuration) and two auxiliary ship design studies. The proposed method combines various tools used by UCL and the UK Ministry of Defence, as well as a new approach for recoverability assessment and, therefore, tackles difficulties currently associated with the latter (e.g.: lack of data, human performance and time dependence) by using weighted performance measures. An overall approach for survivability assessment has been applied across the range of designs produced and conclusions drawn on their relative merits for overall survivability. The approach and implications of the integration of survivability assessment in the preliminary ship design stages, as well as the identification of major survivability design drivers, are discussed. Through the identification of problematic topics, areas for further research are suggested. It is envisaged that this research will assist in developing the design process of what are, according to Captain C. Graham, USN, “the most complex, diverse and highly integrated of any engineering systems” produced today on a regular basis.
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Rodriguez, Alfredo. "Frequency reuse through RF power management in ship-to-ship data networks." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA341252.
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Thesis (M.S. in Electrical Engineering) Naval Postgraduate School, December 1997."December 1997." Thesis advisor(s): Chin-Hwa Lee. Includes bibliographical references (p. 59). Also available online.
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Xu, Jinsong. "Estimation of wave-induced ship hull bending moment from ship motion measurements." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0029/NQ62460.pdf.
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Higgins, Brian E. "Motion analysis of a trolly interface for ship-to-ship cargo transfer." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Dec%5FHiggins.pdf.
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Johnson, Paul Anthony. "The moving picture ship." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0010601.
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Bjørnerem, Vegard Stølen. "Low Greenhouse GasEmission Ship." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11441.
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The fleet consists of 6 LNG carriers where 3 have a loading capacity of 44 000 tons while the remaining 3 ships can lift 33 00 tons of LPG. Since the ships are set to operate at speeds between 14 and 20 knots it is necessary to upgrade the prime movers as the service speeds range from 14.5 to 16.7 knots. BW Clipper will prove to be far more effective in terms of fuel consumption compared to the other ships due to higher initial service speed and a relatively efficient engine. The fleet will operate within tramp shipping fulfilling 18 contracted orders and serving the spot market in between ordered shipments. The duration and the profitability of the orders influenced the net income. It is favorable to be committed to profitable contracted orders in recession while it is unfavorable to be bound to low rate contracted orders in prosperity. The ships were assigned to two to four contracted orders each. The fuel prices are changing rapidly and the magnitude of the variations can be vast. This impacts the shipping companies as the fuel costs are a large item of expenditure in the shipping industry. For the period between second half of 2006 and end 2007 I estimated the IFO 180 price to be 353 USD/ton, while it was 383 USD/ton in a defined prosperity level and 138 USD/ton in a defined recession level. The freight rates for the actual level, the prosperity level and the recession level were estimated to 36.5 USD/ton, 63 USD/ton and 25.7 USD respectively. The spot market potential was fully utilized at the prosperity level, 88% in the actual level while only 57.5% was utilized in the recession level.
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Thurman, Katie Podolak. "Optimal ship berthing plans." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/26134.
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A ship berthing plan assigns surface vessels a berth prior to their port entrance, or reassigns ships once in port to allow them to accomplish in a timely manner maintenance, training, and certification events which build readiness for future operational commitments. Each ship requires different services when in port, such as shore power, crane services, ordnance, and fuel. Unfortunately, not all services are offered at all piers. At present, ship berthing plans are manually prepared by a port operations scheduler and often result in unnecessary berth shifts, which puts ships out of action for several hours. An extensive user-friendly computerized optimization model is developed and tested to assist the schedulers in the creation of berthing plan which minimizes port loading conflicts, thus promoting fleet readiness through berthing stability. Norfolk Naval Station is used. Keywords: Port loading; Berthing plans; Port berthing; Military thesis; Ship berthing plans; Ship berthing; Berth scheduling; Ship scheduling; Supply replenishment. (kt)
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Lin, Ying-Tsair. "Ship longitudinal strength modelling." Thesis, University of Glasgow, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320513.
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Pourzanjani, M. M. A. "Simulation of ship manoeuvring." Thesis, University of Exeter, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378242.
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McKesson, Christopher B. "Innovation in Ship Design." ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1654.
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What is innovation in ship design? Is it a capability that is inherent in all naval architects? Is it the result of the application of a certain set of tools, or of operation within a certain organizational structure? Can innovation be taught?
Innovation is a creative act that results in a new and game-changing product. The emergence of an innovative product creates an asymmetric market. The emergence of an innovative weapon creates an asymmetric battlefield. It is clearly in the economic and military interest of the United States to be able to develop and deploy innovative products, including innovative ships.
But the process of ship design is usually one of incremental development and slow evolution. Engineers are taught to develop their product by paying close attention to previous developments. This approach is viewed by some people as anti-innovative. And yet the author has made a career of innovation in ship design. How has this been possible?
This dissertation will answer the four questions posed above. It will show what innovation in ship design is, and where innovative naval architecture lies in the taxonomy of human creative endeavor. It will then describe those human attributes which have been found to be essential to successful innovation. It will also describe some of the many tools that innovators use. Some of those tools are used unconsciously. Some of those tools are formal products supported by research institutes and teaching academies.
Finally, given the fact that innovation in ship design is a component of engineering – which is a subject taught in Universities – and that it is facilitated by the use of tools – and tool use can be taught – the author will conclude that innovation itself can be taught.
Whether it can be mastered will depend upon the individual, just as with most other creative skills.
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Borovyk, I. S., and N. V. Okunevych. "House-ship of chernivtsi." Thesis, Буковинський державний медичний університет, 2012. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/1455.
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Van, Biljon Stefan. "KL-Metamatic Ghost Ship." Master's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/14044.
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The aim is to provide a
comprehensive representation of the project's development from theoretical
beginnings to architectural detail.
The theoretical ideas underpinning my design were developed in two
complementary papers, KL-Metamatic (theory) and Soft Machines
(technology). Three primary interests were identified:
1. The search for a design approach aimed at a more personal experience of
space.
The goal was to develop a design approach that may allow occupants to
rediscover their own imagination and senses through direct engagement with
an atmospheric site.
2. The use of site as an a priori program.
My interest in phenomenology and the subconscious was developed through a
site. KL-Berth, located within Cape Town's Duncan Dock, was selected on
the strength of its surprising atmospheric richness, movement and personal
significance for the researcher. The letters K and L indicate the berth's
position along the terminal.
3· To work in the spirit of techne.
Techne, in the true sense of the word, refers to the act of uncovering the
mysterious. Such experiments bear testament to a rigorous process of self-discovery
through invention. This is a function of both craftsmanship and
· imagination. Experimentation is emphasised over preconception.
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Chen, Donghui. "Simplified Ship Collision Model." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/32095.
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The serious consequence of ship collisions necessitates the development of regulations and requirements for the subdivision and structural design of ships to reduce damage and environmental pollution from collision, and improve safety. The on-going revision of IMO regulations on oil outflow performance and damage stability in grounding and collision is focused on a transition to probabilistic performance-based standards. This thesis addresses one aspect of this problem, a simplified collision model sufficient to predict collision damage, and fast enough to be used in probabilistic analysis requiring thousands of collision simulations.
The simplified collision model (SIMCOL) developed and evaluated in this thesis is based on a time domain simultaneous solution of external dynamics and internal deformation mechanics. The external sub-model uses a three-degree of freedom system for ship dynamics. The internal sub-model determines reacting forces from side and bulkhead structures using mechanisms adapted from Rosenblatt and McDermott, and absorbed energy by decks, bottoms and stringers calculated using the Minorsky correlation as modified by Reardon and Sprung.
SIMCOL is applied to a series of collision scenarios. Results are compared with MIT's DAMAGE, a Danish Technical University (DTU) model and ALPS/SCOL. SIMCOL provides a fast, consistent and reasonable result for ship collision analysis. An actual collision case is used in an initial attempt to validate the model.
This research is sponsored by the Society of Naval Architects and Marine Engineers (SNAME) and the Ship Structure Committee (SSC).Master of Science
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Eurenius, Oskar, and Tobias Heldring. "Ship and Weather Information Monitoring (SWIM) : Interactive Visulization of Weather and Ship Data." Thesis, Linköping University, Department of Science and Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-17655.
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This paper focus on the development of a tool for Ship and Weather Information Monitoring (SWIM) visualizing weather data combined with data from ship voyages. The project was done in close collaboration with the Swedish Meteorological and Hydrological Institute (SMHI) who also evaluated the result. The goal was to implement a tool which will help shipping companies to monitor their feet and the weather development along planned routes and provide support for decisions regarding route choice and to evade hazard. A qualitative usability study was performed to gather insight about usability issues and to aid future development. Overall the result of the study was positive and the users felt that the tool would aid them in the daily work.
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Swiegers, Pierre Brink. "Calculation of the forces on a moored ship due to a passing container ship." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17958.
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Thesis (MScEng)--Stellenbosch University, 2011.ENGLISH ABSTRACT: When a sailing ship passes a moored ship the moored ship experiences forces and moments. These forces and moments cause the moored ship to move. The resulting ship motions due to the passing ship can sometimes be more severe than the ship motions due to ocean waves and can cause serious accidents at moorings such as the failing of mooring lines or even the total break away of the ship from the berth. Since bulk carriers and tankers were traditionally the largest seafaring ships, passing ship studies have focused mainly on these vessels, but recently container ships have grown to a comparable size. In this study an existing numerical model “Passcat” is validated with physical model measurements for a Post Panamax container ship passing a Panamax bulk carrier. Other existing mathematical formulae are also evaluated by comparison with these model tests. In the physical model tests the passing speed (V), passing distance (G), depth draft ratio (d/D) and the presence of walls and channels were varied. It was found that the passing ship forces are proportional to the passing speed to the power of 2.32. This is slightly higher than the generally accepted quadratic relationship for passing ship induced forces. Similar relationships were found for the other variables. The numerical model results were compared to the physical model measurements by determining agreement ratios. A perfect agreement between the numerical and physical models would result in an agreement ratio of 1. Agreement ratio boundaries, wherein agreement would be regarded as good, were drawn between 0.7 and 1.3. The numerical model, Passcat, was found to under predict the passing ship forces. It was found that Passcat is valid for a wide range of sensitivities and remains within the agreement ratio limits as long as passing speed is limited to 10 knots (kt), depth draft ratio to more than 1.164, passing distance to less than four times the moored ship beam (Bm) for surge and sway estimation and passing distance to less than three times the moored ship beam for yaw estimations. These limits are true for no structures in the water. For structures in the water only the passing speed limits are different. When quay walls are present, the surge and sway forces will only provide acceptable answers at passing speeds below 9kt. When 9Bm or 12Bm channels are present, the sway force will only provide acceptable answers at passing speeds below 7kt. When a 6Bm channel is present, the yaw moments will only provide acceptable answers at passing speeds below 6kt. From the mathematical model evaluation study it was found that empirical or semi empirical methods can not provide answers with good agreement to the physical model when walls or channels are present. For the open water case, it is only the Flory method that can provide answers with good agreement to the physical model for surge, sway and yaw forces. The Flory method can provide answers with acceptable agreement within narrow boundaries of passing distance (1 to 2 times the beam of the moored ship), passing speed (4 kt to 14 kt) and depth draft ratio (less than 1.7). The numerical model, Passcat can be used with little effort to provide answers with better agreement to the physical model for a larger range of variables.
AFRIKAANSE OPSOMMING: Wanneer ’n skip verby ‘n vasgemeerde skip vaar, ondervind die vasgemeerde skip kragte en momente. Hierdie kragte induseer beweging van die vasgemeerde skip. Die beweging kan soms groter wees as die effek van wind of golwe. Indien die bewegings groot genoeg is kan dit van die vasmeer lyne van die skip laat breek, of al die lyne laat breek sodat die skip vry in die hawe ronddryf. Aangesien erts skepe en tenk skepe vir jare die grootste skepe in the wêreld was, het die meeste van die skip interaksie studies op daardie skepe gefokus. Die grootte van behouering skepe het egter in die onlangse tye gegroei om dimensies soortgelyk aan die van erts en tenk skepe te hê. In hierdie studie word ’n bestaande numeriese model “Passcat” gestaaf met fisiese model metings op ’n Post Panamax behoueringskip wat verby ‘n Panamax erts skip vaar. Bestaande wiskundige formules is ook getoets deur dit met dieselfde fisiese model metings te vergelyk. In die fisiese model studie is die spoed van die skip (V), tussenafstand (G), diepte diepgang verhouding (d/D) en die teenwoordigheid van kaai mure en kanale in die water getoets. Daar is gevind dat die kragte op die vasgemeerde skip direk eweredig is aan die spoed van die skip tot die mag 2.32. Dit is effens meer as die algemeen aanvaarde kwadratiese verhouding tussen vloeistof sleurkrag en vloeisnelheid asook tussen skip interaksie kragte en vaar snelheid. Soortgelyke verhoudings is vir al die veranderlikes bereken. Numeriese model resultate is vergelyk met die fisiese model om die verhouding van ooreenstemming te bepaal. ’n Perfekte ooreenstemming word voorgestel deur ’n verhouding van ooreenstemming van 1. Grense waarbinne die verhouding van ooreenstemming as goed beskou word is getrek tussen 0.7 en 1.3. Daar is gevind dat die numeriese model, Passcat, kragte oor die algemeen onderskat. Passcat is geldig vir 'n breë reeks van veranderlikes en sal geldig bly solank die skip spoed tot 10 knope, diepte diepgang verhouding tot meer as 1.164, tussenafstand tot minder as vier skipwydtes (Bm) vir 'surge' en 'sway' kragte en tot minder as drie skipwydtes vir 'yaw' momente beperk word. Hierdie grense is opgestel vir geen strukture in die water. Vir strukture in die water word slegs die skip spoed aangepas. Wanneer daar mure in die water is sal 'surge' en 'sway' slegs geskikte antwoorde gee as die skip spoed tot 9 knope beperk word. Vir 9Bm of 12Bm kanale sal geskikte antwoorde vir 'sway' kragte slegs voorkom met 'n skip spoed minder as 7 knope. Vir 6Bm kanale sal geskikte antwoorde vir 'yaw' momente slegs voorkom met 'n skip spoed van minder as 6 knope. Van die wiskundige model evaluasie studie is gevind dat empiriese of semi empiriese metodes nie resultate met goeie ooreenstemming tot the fisiese model metings kan gee, wanneer daar kaai of kanaal mure in die water is nie. Vir die oopwater geval is dit slegs die Flory metode wat antwoorde kan voorsien wat goed ooreenstem met die fisiese model vir 'surge', 'sway', en 'yaw' kragte. Die Flory metode voorsien hierdie resultate binne noue grense vir tussenafstand (1 tot 2 wydtes van die vasgemeerde skip), verbyvaar spoed (4 knope tot 14 knope) en diepte diepgang verhouding (minder as 1.7). Die numeriese model, Passcat, kan met min moeite antwoorde bereken wat beter ooreenstemming vir 'n groter reeks veranderlikes gee.
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Hascall, Andrew M., Andrew M. Matthews, Mihaly Gyarmati, William K. Gantt, Zsolt Hajdu, Andrew M. Hascall, Andrew M. Matthews, Mihaly Gyarmati, and William K. Gantt. "Analysis of the ship ops model's accuracy in predicting U.S. Naval ship operating cost." Monterey, California. Naval Postgraduate School, 2003. http://hdl.handle.net/10945/9856.
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MBA Professional ReportApproved for public release, distribution is unlimited
MBA Professional Report
Approved for public release, distribution is unlimited
The purpose of this MBA Project was to investigate and provide a comprehensive analysis of the accuracy of the Ship Ops model used by the US Navy to budget for ship-operating costs. This project was conducted with the sponsorship and assistance of the OPNAV N82 office, also known as the Office of Budget (FMB). The goal of this project was to improve FMB's ability to predict ship-operating costs through the use of an improved Ship Ops model. This project provides an in depth introduction to the Ship Ops model currently in use and an analysis of the model's performance in predicting accurate operating costs. The project also provides suggestions for improvements to the model and tools that can be used to predict costs on an individual ship level that is not possible with the current model. This project observed only limited improvements in predicting Repair Parts and OPTAR cost through the use of regressions based on operational data such as days underway. Significant improvement was observed when the current moving average methodology for predicting Repair Parts cost was replaced with a regression-based prediction based on a sequential independent variable, Fiscal Year.
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Forster, Tom. "The unmanned ship sets sail - is South Africa prepared to open The Ship Register?" Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25020.
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The dissertation discusses unmanned shipping from a South African perspective. While some nations are trailblazers in this field, other states lack behind and do not yet provide with a clear strategy for the future. Hence, the threat is real that they might be too late and will lose out in the competition to attract ship building, technology development, job creation and a whole new branch of industry. As a shipping nation in a strategically high important geographic area, South Africa's perspective is highlighted and it is examined whether the time has already come to open the ship register for unmanned vessels. Therefore, after a summary regarding the state of affairs, it is evaluated what the most severe dangers of unmanned shipping are from the perspective of compliance with safety regulations. Subsequently, a cost-benefit-analysis follows that seeks to anticipate the decision of the registrar burdened with the question of whether to allow an unmanned vessel of a certain level of autonomy on the South African register. Although it is found that the benefits in prospect are tremendous, it is also concluded that at this point in time great dangers and uncertainties are to expect and that possible solutions to those are still in their infancy. Thus, it is to conclude that the question whether South Africa should open its register for unmanned vessels must be yes ultimately, but not now.
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Hascall, Andrew M. Matthews Andrew M. Gyarmati Mihaly Gantt William K. Hajdu Zsolt. "Analysis of the ship ops model's accuracy in predicting U.S. Naval ship operating cost /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FGantt.pdf.
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Thesis (M.B.A.)--Naval Postgraduate School, June 2003."MBA professional report."--Cover. Joint authors: Andrew M. Matthews, Mihaly Gyarmati, William K. Gantt, and Zsolt Hajdu. Thesis advisor(s): Shu Liao, John Mutty. Includes bibliographical references (p. 283). Also available online.
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Lange, Isabelle. "Ship to shore : Mercy Ships, healing and faith along the southern West African coast." Thesis, London School of Hygiene and Tropical Medicine (University of London), 2016. http://researchonline.lshtm.ac.uk/2548625/.
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In Benin in mid 2004, radio stations began announcing the forthcoming arrival of a Christian hospital ship. It was going to dock in the country’s main port in Cotonou and provide free surgeries for hundreds of people over a period of four months. Presenting the first ethnographic account of Mercy Ships, this dissertation provides a lens for reflecting on the ever-growing number of faith-based organisations in West Africa. This dissertation addresses the following questions: does sought-out contact with the services and environment of this hospital ship change people – both patients and crewmembers – and the way they live, think about and understand their lives? In those circumstances when changes occur, how do they come about? By addressing these questions, this dissertation contributes to a body of work in the anthropology of faith, healing, medical humanitarianism and international development. It not only explores the personal value and meaning for people volunteering with and treated by this faith-based organisation, but it also explores how the hospital ship is enacted and experienced, and how, perhaps surprisingly, it is both the lives of the crewmembers as well as the patients that are changed, as they project their faith and visions of lives well lived onto their ship experience. The promise of the ship as a catalyst for change in the imaginations of crew and patients; the blend of medical and social care on board; the perseverance through physical and emotional challenges; and the separation of the ship from land all blend to create powerful encounters that shape their experiences. These encounters demonstrate how the act of faith can become a form of healing, and likewise, how healing can create and strengthen faith. Throughout their journeys, patients and volunteers grapple with their faith which is intimately intertwined with their physical, social and spiritual well-being.
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Perkins, John Bigelow Jones Lawrence R. "Surface ship overhaul decision analysis." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1992. http://handle.dtic.mil/100.2/ADA260623.
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Pifer, Ryan James. "Modeling of the electric ship." Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Jun/10Jun%5FPifer.pdf.
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Thesis (M.S. in Physics)--Naval Postgraduate School, June 2010.Thesis Advisor(s): Colson, William B. ; Cohn, Keith. ; Second Reader: Armstead, Robert. "June 2010." Description based on title screen as viewed on July 14, 2010. Author(s) subject terms: Free electron laser, railgun, electric ship, laser weapons system, integrated power system. Includes bibliographical references (p. 73-74). Also available in print.
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Vangbo, Petter Olav. "CFD in conceptual ship design." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15480.
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Computational Fluid Dynamics (CFD) has been around for many years. It is a computer tool that can be used to find the hydrodynamic fluid performances. In ship design it is used in a wide area from smoke propagation to resistance estimations. It is however in resistance estimations that CFD have had most focus and research. There are many tools a designer can make use of nowadays. Most of the tools are computer based. This is optimization algorithms, computer aided design (CAD) and computational fluid dynamics (CFD). Using the tools should shorten the time of ship design and make better solutions. I have used a computer tool that mixes optimization with model variation (CAD) and verification (CFD). My conclusion is that it is a powerful tool to use, but should be handled with care. Few variables in the optimization process are important. Conceptual design methodology could be broken down to two outer ranges; point based design and set based design. The methods are quite different when approaching a complex design problem. There seems to be some favor in set based design when coming to a global ‘optimized’ solution to the design problem. More knowledge is gathered in set based design before deciding the final requirements and parameters. This is especially in new developing design where little knowledge is produced in the past. CFD is a broad term. There is many different methods and area of use. In this thesis I will break it down to two terms; potential codes and RANSE codes. Potential codes are easy, robust and well developed. RANSE codes are difficult, takes a lot of time and not so well developed. Potential codes are used in areas where turbulent flows are not present, while RANSE codes are used when it is present and important to the result. If designing new innovative hulls CFD should be used earlier in the design process and with a simulation driven design approach. Simulation driven design could be used with potential codes or RANSE codes. To have a high value rate of the modeling potential codes should be used when many sets of variation I needed and turbulence is not important to the answers. RANSE code should be used when turbulent flow is important to the answer, but must be done with few sets of variations because of high computational effort. If designing a more standard ship, CFD should be used in a modeling design approach to verify the performance estimations that have been done earlier in the process.
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Onur, Cagla. "Acoustic Tracking Of Ship Wakes." Phd thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615656/index.pdf.
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Theories about ship wake structure, bubble dynamics, acoustic propagation through bubble clouds, backscattering and target strength of bubble clouds have been investigated and related Matlab simulations have been carried on. Research has been carried on algorithms for ship wake acoustic detection and tracking. Particle filter method has been simulated with Matlab for target tracking using wake echo measurements. Simulation results are promising.
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Cannon, Stuart Martin. "Materials selection for ship structures." Thesis, Brunel University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294827.
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Yu, Lei. "Fatigue reliability of ship structures." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/2259/.
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Today we are sitting on a huge wealth of structural reliability theory but its application in ship design and construction is far behind. Researchers and practitioners face a daunting task of dove-tailing the theoretical achievements into the established processes in the industry. The research is aimed to create a computational framework to facilitate fatigue reliability of ship structures. Modeling, transformation and optimization, the three key elements underlying the success of computational mechanics are adopted as the basic methodology through the research. The whole work is presented in a way that is most suitable for software development. The foundation of the framework is constituted of reliability methods at component level. Looking at the second-moment reliability theory from a minimum distance point of view the author derives a generic set of formulations that incorporate all major first and second order reliability methods (FORM, SORM). Practical ways to treat correlation and non- Gaussian variables are discussed in detail. Monte Carlo simulation (MCS) also accounts for significant part of the research with emphasis on variance reduction techniques in a proposed Markov chain kernel method. Existing response surface methods (RSM) are reviewed and improved with much weight given to sampling techniques and determination of the quadratic form. Time-variant problem is touched upon and methods to convert it to nested reliability problems are discussed. In the upper layer of the framework common fatigue damage models are compared. Random process simulation and rain-flow counting are used to study effect of wide-banded non-Gaussian process. At the center of this layer is spectral fatigue analysis based on SN curve and first-principle stress and hydrodynamic analysis. Pseudo-excitation is introduced to get linear equivalent stress RAO in the non-linear ship-wave system. Finally response surface method is applied to this model to calculate probability of failure and design sensitivity in the case studies of a double hull oil tanker and a bulk carrier.
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Wilson, Stephen K. "The mathematics of ship slamming." Thesis, University of Oxford, 1989. http://ora.ox.ac.uk/objects/uuid:7bc325cf-e6a1-45d2-add2-100d9968354c.
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Motivated by the motion of a ship in a heavy sea, a mathematical model for the vertical impact of a two-dimensional solid body onto a half-space of quiescent, inviscid, incompressible fluid is formulated. No solutions to the full problem are known, but in the case when the impacting body has small deadrise angle (meaning that the angle between the tangent to the profile and the horizontal is everywhere small) a uniformly valid solution is obtained by using the method of matched asymptotic expansions. The pressure on the body is calculated and is in fair agreement with experimental results. The model is generalised for more complicated impacts and the justifications for the model are discussed. The method is extended to three-dimensional bodies with small deadrise angle and solutions are obtained in some special cases. A variations! formulation of the leading order outer problem is derived, which gives information about the solution and leads to an fixed domain scheme for calculating solutions numerically. A partial linear stability analysis of the outer problem is given which indicates that entry problems are stable but exit problems are unstable to small perturbations. A mathematical model for the effect of a cushioning air layer between the body and the fluid is presented and analysed both numerically and in appropriate asymptotic limits. Finally, the limitations of the models are discussed and directions for future work indicated.
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Fitzsimmons, Van R. "Littoral Combat Ship crew scheduling." Thesis, Monterey, California: Naval Postgraduate School, 2015. http://hdl.handle.net/10945/45186.
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Approved for public release; distribution is unlimitedThe Littoral Combat Ship (LCS) is a naval combatant designed to operate in the littoral regions. Twenty-four LCSs will be built over the next five years employing a crew rotation concept where three crews rotate between two ships. During the construction period, an experienced crew must be assigned, which disrupts the desired crew rotation in ships already built. This thesis develops LCS Scheduler (LCSS), a mathematical optimization model using a mixed-integer, linear program (MIP) to aid in assigning LCS crews to LCS ships. LCSS’s objective is to minimize the penalty associated with assigning crews outside of their desired ship pairing and/or extending them beyond four months in a phase. Results are compared based on solve time and penalty value. The MIP solution has the best quality. Yet, even for a shorter-than-desired time horizon, it takes many hours of computation. Rolling horizon is a heuristic approach that produces a full, long-term schedule in under an hour but requires manual modifications to misaligned crews. Fix-and-relax is a more-elaborate heuristic with potential benefits to crew alignment for longer-range schedules. The planner must balance solve time and solution quality when determining the approach to LCSS.
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DeWitt, Amy Murphy. "Surface ship maintenance planning process." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28580.
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Perkins, John Bigelow. "Surface ship overhaul decision analysis." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/30591.
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Approved for public release; distribution is unlimited.Efficient Surface Ship Maintenance and repair is vital to the U.S. Navy. With defense budgets tightening, accurate and economically sound decision making in this program is essential. To improve decision making, it would be helpful to have an accurate analysis program to evaluate the adequacy of ship maintenance and repair decisions. This system should use available overhaul information to identify errors made during the overhaul process. This thesis analyses current Navy ship maintenance and repair feedback processes to determine if any system is used presently that adequately measures the accuracy of decisions made within the Surface Ship Maintenance Program. Further, this thesis develops an overhaul decision analysis model to assess the present Navy surface ship decision process. Finally, this thesis draws conclusions based on application of the model. These findings address both cost and equipment readiness issues to demonstrate the benefits of an an effective surface ship decision analysis program.... Surface ship overhaul decision process, Surface ship overhaul feedback systems.