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9078 results Most recent
  • Numerical and experimental study of 3D sloshing in tanks of LNG carriers

    Authors

    Makoto Arai ; Humberto S Makiyama ; Liang-Yee Cheng et al.

    Date published

    2005

    Abstract

    The demand for natural gas is rising quickly and consequently the world energy market requires the transport of larger volumes of gas in the form of LNG. However the market calls for the collection of smaller volumes of LNG from more than one location. These requirements may be met by building large LNG carriers with capacities of over 200000 cubic meters and by operating these ships with the flexibility of partial filling of cargo tanks. Partial filling in membrane-type LNG carriers leads to sloshing and the loads generated may endanger the ship's structural integrity. Therefore it is necessary for the ship designer to know the magnitude of those sloshing loads and under what conditions they occur. A finite difference method is presented that was developed to numerically simulate sloshing in a membrane-type LNG carrier's tank. Model experiments are carried out to verify the results of the numerical method. The considered tanks are of a LNG carrier with a capacity of over 200000 cubic meters. The 3D numerical studies showed that the liquid inside the tanks exhibit different behaviour depending on the filling ratio and the encountered wave frequencies. Response characteristics due to the tank configuratioX46228 Numerical and experimental study of submerged flexible nets - applications to fish farms

    Authors

    Makoto Arai ; Humberto S Makiyama ; Liang-Yee Cheng et al.

    Date published

    2005

  • Preliminary study of the monitoring for turbid coastal waters using a new satellite sensor 'Aster'

    Authors

    Yuji Sakmo ; Tsuneo Matsunaga ; Toshiaki Kozu et al.

    Date published

    2002

    Abstract

    Satellite remote sensing is now accepted as an important means for monitoring the world's oceans synoptically. Advances in remote sensing systems have resulted in instruments which are ideal for coastal investigations such as the CZCS (coastal one colour scanner) and the AVHRR (advanced very high resolution radiometer) which generate 1 km resolution data. On the other hand higher resolution (20-30 m) imagery such as Landsat and SPOT satellites may be more useful for the coastal area. Previous studies have been successful with remote sensing using their sensors to estimate water quality parameters (Chl.a (chlorophyll-a) SS (suspended solid) and SDD (Secchi disk depth)) in coastal waters. However these sensors have a few problems with spatial and radiometric resolution. Since the new satellite sensor 'ASTER' has high spatial spectral and radiometric resolutions its data can be much more useful for monitoring in coastal areas. ASTER data is compared with in-situ data (buoy data or ship data) for the estimation of sea surface temperature or surface chlorophyll-a concentration as first step to assess coastal environments using high-resolution satellite sensors. The preliminary study of monitoring for turbid coastal waters using a high-resolution satellite sensor Term-ASTER (advanced space-borne thermal emission and reflection radiometer) launched in December 1999 was examined. ASTER data buoy data and in-site water quality data (SST (sea surface temperature) or chlorophyll-a concentration)

    Authors

    Yuji Sakmo ; Tsuneo Matsunaga ; Toshiaki Kozu et al.

    Date published

    2002

  • Taking the next steps in emissions reduction for large 2-stroke engines

    Authors

    Rudolf Holtbecker ; German Weisser ; Matthias Amoser

    Date published

    2007

    Abstract

    All low speed 2-stroke engines produced for ships constructed after 1st January 2000 comply with the IMO regulation specifying emissions limits for NOx in particular in Annex VI of Marpol 73-78. After this regulation came into force in May 2005 discussions started within IMO for the next step in emissions reduction with the target of creating new limits to be valid probably from 2010 onwards. The currently applied technologies are reviewed and today's potential for further reducing emissions by means of adjustments of the thermodynamic layout and of further optimisation of fuel injection are shown. The key technology enabling exploitation of all these possibilities is the RT-flex system which has become the preferred option on new Wartsila 2-stroke engines. To achieve additional substantial reductions of NOx emissions wet technologies will most likely have to be applied. Based on the former promising test-bed results with NOx reductions up to 50% direct water injection equipment has been developed and installed the first time on a large bore engine in ship operation. The aim is to accumulate experience of the system in long-term operation at regular service conditions. A completely new approach to reduce not only NOx but also all other emissions simultaneously can be seen in the application of the WHR (waste heat recovery) concept.

    Authors

    Rudolf Holtbecker ; German Weisser ; Matthias Amoser

    Date published

    2007

  • The application of advanced numerical tools in design for Stockholm Agreement upgrading

    Authors

    Dracos Vassalos ; Cantekin Tuzcu ; Osman Turan et al.

    Date published

    2003

    Abstract

    The engineering consulting company Safety at Sea was set up to exploit technology developed at the University of Glasgow and Strathclyde. A process known as TSA (total stability assessment) is used with this technology to develop a niche in the upgrading of ro-ro vessels to SOLAS 90 and the Stockholm Agreement. This process includes damage stability upgrading using commercial static stability software in conjunction with numerical simulations of the dynamic behaviour of the damaged ship before progressing to the physical damage survivability model tests. Once an upgrade solution has been optimised a physical model for damage survivability is built for testing in a towing tank. Using this approach nearly 70 vessels have been tested (80% of the north European ro-ro fleet needing upgrading). The practical application of TSA is shown through a comparative study addressing ro-ro damage survivability based on SOLAS 90 Stockholm Agreement numerical simulations and physical model tests. It is also demonstrated how the correct application of TSA is conducive to optimal and inexpensive solutions effectively reducing the average cost of upgrading to Stockholm Agreement to that of upgrading to SOLAS 90 for the majority of ships tested to date.

    Authors

    Dracos Vassalos ; Cantekin Tuzcu ; Osman Turan et al.

    Date published

    2003

  • The practice of marine education and training in Europe and the new IMCO requirements

    Authors

    The Nautical Institute

    Shelf Location

    213c

    Abstract

    Seminar held in Amsterdam 5 - 6 June 1980. Papers are: Nautical examinations to meet IMCO requirements Computer-aided shipboard training The development of syllabuses to meet he IMCO tanker safety and hazardous cargo endorsements for deck and engineer offices Training for safe gas carrier operations at the ship/jetty interface The training of ratings Recent British marine simulator developments ARPA simulators - present and future Sensible training for effective communication at sea Techniques for improving language studies for nautical students Standard marine language Training in personnel management for the seafarer Psychology and the application of knowledge Films and cassettes as training aids On-board training Steps to be taken to improve on board effectiveness of marine education and training for deck officers Exploring the opportunities for closer co-operation between European education and training establishments European co-operation and the EEC The need for co-operation in the development of text books for teaching maritime English The UK Association of Navigation Schools and its guide to Dept. of Trade certificates in learning objectives format Education and the seafarer The approaches of the developing countries in meeting the requirements of the International Convention on standards of training, certification and watchkeeping for seafarers 1978 Teachers' training for marine lecturers and instructors The problems of updating.

    Authors

    The Nautical Institute

    Publisher

    London ; The Nautical Institute

    Shelf Location

    213c

    Date published

    1980

  • The use of non linear models in the analysis of CPP actuator behaviour

    Authors

    Bakker ; Grimmelius ; Wesselink

    Date published

    2006

    Abstract

    To optimise the control of ship propulsion systems using an Controllable Pitch Propeller (CPP) a good understanding of the behaviour of the hydraulic actuator system is essential. The CPP actuator contains several strongly non linear components. Therefore it is not possible to model the system accurately with linear models based on the physical properties of the system. However linear models are preferred for the analysis of the dynamic characteristics of the system and system controller design. in this paper the required linear models are obtained using a detailed non linear model. The non linear model is based on the first principles and the physical properties and geometry of the system and validated with measurements. The non linear model is used to understand the operation of the system to investigate the influence of the non linearities and to obtain a set of suitable operating points in which linear models can be identified. In this way a set of linear models is found but still linked to the physical properties of the system. The linear models are used to determine the dynamic characteristics of the system. The non linear model is compared with the linear models to determine the influence of the non linearities.

    Authors

    Bakker ; Grimmelius ; Wesselink

    Date published

    2006

  • Time-domain simulation of barge capsizing by a chimera domain decomposition approach

    Authors

    Hamn-Ching Chen ; Tuanjie Liu ; Kuang-An Chang et al.

    Date published

    2002

    Abstract

    Pontoon platforms which were designed primarily for inland uses assumed a more important role offshore in recent years. The attributes of modular construction and large payload capacity make them a low-cost candidate for contingent operations at sea. The development of on-site assembly capability of a floating structure in rough waters further enhances their attractiveness for offshore applications. Although these floating structures show certain functional qualities resulting from the box shape they also exhibit the weather sensitive motions typical of a large water-plane hull. Dynamic stability is a serious concern of slender platforms. While pontoon platforms normally demonstrate a hefty load carrying capacity due to their large water plane areas they also suffer from low freeboard under heavy loads due to their shallow depths. Decks are often heavily washed or even deeply submerged during rough weather conditions. Furthermore these barges are designed to carry loads exclusively on deck. Heavy deck loads serve to elevate the overall center of gravity of a deck barge up to several feet above deck. A chimera RANS method is further extended for time-domain simulation of the capsising behaviour of a pontoon barge in extreme weather. Calculations were carried out first for a fixed rectangular barge in beam sea conditions. The computed wave elevations velocity vectors and vorticity contours were compared to the corresponding experimental data obtained from PIV (particle image velocimetry) measurements to verify the accuracy of the simulation results. After successful validations for the fixed bar89132 Time-domain simulation of large amplitude ship roll motions by a Chimera RANS method

    Authors

    Hamn-Ching Chen ; Tuanjie Liu ; Kuang-An Chang et al.

    Date published

    2002

  • Experimental evaluation of the dynamic air gap of a large-volume semi-submersible platform

    Authors

    Alexandre N Simos ; Andre L C Fujarra ; Joao V Sparano et al.

    Date published

    2005

    Abstract

    As oil and gas exploitation offshore Brazil moves towards deeper waters two types of floating systems prevail as the main choices in the development of new projects: the FPSO (Floating Production Storage and Offloading System) and the SS (semi-submersible) platforms. Petrobras has been working on the definition of a new generation of SS platforms adapted for the Brazilian environmental conditions. As a general rule the new platforms display large displacement buoyant hulls in a four-columns configuration each of the columns presenting an almost squared horizontal section. The projects under development establish taut-leg mooring systems with polyester mooring-lines. Defining the air gap of SS platforms is a critical issue in the design of this type of floating system. An unnecessary increase in the air gap negatively affects the payload and therefore the project economics. The task is complex since there is no well-established procedure for predicting the air gap demand of the platform during its design. The first part of a systematic experimental study is presented which was requested by Petrobras in order to determine a suitable procedure for the evaluation of air gap demand on the new SS hulls under design. Two main concerns with this particular geometry are the wave run-up due to the large flat surface of the column walls and the influence of the non-linear restoring forces provided by the taut-leg mooring system. Some towing-tank results carried out for the evaluation of the dynamic air gap of a large-volume semi-submersible platform are presented. Regular wX23306 Experimental evaluation of the effects of water depth and speed on the manoeuvring derivatives of ship models

    Authors

    Alexandre N Simos ; Andre L C Fujarra ; Joao V Sparano et al.

    Date published

    2005

  • Research in Maritime History no. 27: Sail and Steam, Selected Maritime Writings of Yrjo Kaukiainen

    Authors

    compiled by Lars U. Scholl and Merja-Liisa Hinkkanen

    Shelf Location

    338b

    Abstract

    Table of Contents Acknowledgements / iii-v Lars U. Scholl, "Yrjö Kaukiainen: A Tribute on the Occasion of his Forthcoming Retirement as Professor of Maritime History at the University of Helsinki" / vii-x Merja-Liisa Hinkkanen, "Yrjö Kaukiainen: A Man of the Sea" / xi-xiv Lewis R. Fischer, "Yrjö Kaukiainen and the Development of Maritime Economic History: / xv-xviii Yrjö Kaukiainen, "Finnish Sailors, 1750-1870" / 1-20 Yrjö Kaukiainen, "Finnish and International Maritime Labour in the Age of Sail: Was There a Market?" / 21-29 Yrjö Kaukiainen, "Five Years before the Mast: Observations on the Conditions of Maritime Labour in Finland and Elsewhere" / 31-44 Yrjö Kaukiainen, "The Maritime Labour Market: Skill and Experience as Factors of Demand and Supply" / 45-52 Yrjö Kaukiainen, "Owners and Masters: Management and Managerial Skills in the Finnish Ocean-Going Merchant Fleet, c. 1840-1880" / 53-67 Yrjö Kaukiainen, "From Low-Cost to High-Cost Shipping: Finnish Maritime Labour Costs after the Second World War" / 69-77 Yrjö Kaukiainen, "The Modernization of Finnish Coastal Shipping and Railway Competition c. 1830-1913" / 79-90 Yrjö Kaukiainen, "British Timber Imports and Finnish Shipping, 1860-1910" / 91-99 Yrjö Kaukiainen, "Baltic Timber-Trade under Sail: An Example of the Persistence of Old Techniques" / 101-111 Yrjö Kaukiainen, "Coal and Canvas: Aspects of the Competition between Steam and Sail, c. 1870-1914" / 113-128 Yrjö Kaukiainen, "Dutch Shipping and the Swedish Navigation Act (1724). A Case Study" / 129-139 Yrjö Kaukiainen, "Seamen Ashore: Port Visits of Late Nineteenth-Century Finnish Sailors" / 141-149 Yrjö Kaukiainen, "Wreck-plundering by East Finnish Coastal People- Criminal Tradition or Popular Culture?" / 151-162 Yrjö Kaukiainen, "From Days and Knots to Pounds and Dollars: Some Problems in the Study of the Economics of Late Nineteenth Century Merchant Shipping" / 163-177 Yrjö Kaukiainen, "Tons and Tonnages: Ship Measurement and Shipping Statistics, c. 1870-1980" / 179-205 Yrjö Kaukiainen, "International Freight Markets in the 1830's and 1840's: The Experience of a Major Finnish Shipowner" / 207-230 Yrjö Kaukiainen, "Shrinking the World: Improvements in the Speed of Information Transmission, c. 1820-1870" / 231-260 Merja-Liisa Hinkkanen, "Yrjö Kaukiainen: A Maritime Bibliography" / 261-266

    Authors

    compiled by Lars U. Scholl and Merja-Liisa Hinkkanen

    Publisher

    St. John's, NL : International Maritime Economic History Association, 2004.

    Shelf Location

    338b

    ISBN number

    973007370

  • Modern marine engineer's manual Volume 2 3rd edition

    Authors

    Everett C Hunt ed. in chief ; James A Harbach assoc. ed. ; Alan L Rowen assoc. ed.

    Shelf Location

    234b

    Abstract

    This third edition is an updated text of the second edition, designed to provide information concerning new and changing technologies that have developed during the past ten years. The chapters covering refrigeration and HVAC have been revised to incorporate new refrigerants replacing the fluorocarbons phased out by the Clean Air Act. Other international protocols governing operation and maintenance of refrigeration systems are discussed. The propulsion systems compatible with the unique cargo of LNG vessels are described in Chapter 20. Chapter 21, covering hull machinery, has been completely rewritten to describe machinery in current use. The computer-based integrated and centralised control system of alarms, condition monitoring, management, record keeping and communications found on modern passenger vessels and other specialised vessels are described in Chapter 24. Technical advances in monitoring and analysis of machinery and hull vibrations have been added to Chapter 25. New equipment and systems for handling trash, sewage, bilge water, and other waste materials have been added to Chapter 28. Chapter 30 has been rewritten to provide current and more detailed information on ship trial procedures. Where materials from the second edition has been used it has been carefully reviewed to assure it is correct for current usage. There are chapters on marine diesel engines, engine descriptions, marine refrigeration systems, heating, ventilation and air conditioning, cryogenic cargo systems, hull machinery, marine electrical systems, electrical machinery, shipboard central operations systems, shipboard vibration analysis, inert gas systems and crude oil washing machinery, coal burning technology, waste disposal systems, propellers and propulsion and machinery tests and trials.

    Authors

    Everett C Hunt ed. in chief ; James A Harbach assoc. ed. ; Alan L Rowen assoc. ed.

    Publisher

    Centreville, Md. : Cornell Maritime Press, 1999-2002.

    Catalogue number

    623.87

    Shelf Location

    234b

    Date published

    2002

    ISBN number

    870335375

  • Raising the Hunley: The Remarkable History and Recovery of the Lost Confederate Submarine

    Authors

    Brian Hicks; Schuyler Kropf

    Shelf Location

    36d

    Abstract

    The history of the Confederate submarine H. L. Hunley is as astonishing as its disappearance. On February 17, 1864, after a legendary encounter with a Union battleship, the iron “fish boat” vanished without a trace somewhere off the coast of South Carolina. For more than a century the fate of the Hunley remained one of the great unsolved mysteries of the Civil War. Then, on August 8, 2000, with thousands of spectators crowding Charleston Harbor, the Hunley was raised from the bottom of the sea and towed ashore. Now, award-winning journalists Brian Hicks and Schuyler Kropf offer new insights into the Hunley’s final hours and recount the amazing true story of its rescue.The brainchild of wealthy New Orleans planter and lawyer Horace Lawson Hunley, the Hunley inspired tremendous hopes of breaking the Union’s naval blockade of Charleston, only to drown two crews on disastrous test runs. But on the night of February 17, 1864, the Hunley finally made good on its promise. Under the command of the heroic Lieutenant George E. Dixon, the sub rammed a spar torpedo into the Union sloop Housatonic and sank the ship within minutes, accomplishing a feat of stealth technology that would not be repeated for half a century.And then, shortly after its stunning success, the Hunley vanished.This book is an extraordinary true story peopled with a fascinating cast of characters, including Horace Hunley himself, the Union officers and crew who went down with the Housatonic, P. T. Barnum, who offered $100,000 for its recovery, and novelist Clive Cussler, who spearheaded the mission that finally succeeded in finding the Hunley. The drama of salvaging the sub is only the prelude to a page-turning account of how scientists unsealed this archaeological treasure chest and discovered the inner-workings of a submarine more technologically advanced than anyone expected, as well as numerous, priceless artifacts.Hicks and Kropf have crafted a spellbinding adventure story that spans over a century of American history. Dramatically told, filled with historical details and contemporary color, illustrated with breathtaking original photographs, Raising the Hunley is one of the most fascinating Civil War books to appear in years.

    Authors

    Brian Hicks; Schuyler Kropf

    Publisher

    Presidio Press; New York, 2002

    Shelf Location

    36d

    ISBN number

    345447727

  • A numerical study on the geometry of jet injection nozzle of a Coanda control surface

    Authors

    Dae Won Seo ; Joung Hyun Kim ; Hyochul Kim et al.

    Date published

    2008

    Abstract

    The Coanda effect is a physical phenomenon which has been applied to various fields in aerodynamics. The Coanda effect demonstrates that a flow tangential to a solid surface generates low-pressure fields around it and consequently the flow remains tangential even along the curved surface as far as the pressure force surpass the centrifugal force of the flow turning about the surface. The many studies on the Coanda effect that have been carried out so far focus on the spiral jet type. The effect of the gap clearance of jet injection slit and the local curvature of the surface at the slit have been carefully surveyed. Studies have also been carried out on the effect of the jet blowing angle to the surface at the slit. The conventional practice of installing rudders downstream of propeller may not guarantee sufficient rudder force for proper manoeuvring of a ship at low speed. In previous studies the variation of the cross-sectional shape of a rudder and the addition of appendages have been investigated to improve the rudder performance. In other studies a water jet has been injected tangentially over rudder surfaces with or without a flap to enhance the rudder force by the resulting Coanda effect. In the present paper the proper locations of the slit and water intake of the gap between the horn and rudder surface have been numerically surveyed to support a design of a Coanda rudder. For verification of the numerical method98765 Numerical study on unsteady flow around an underwater vehicle with two pairs of mechanical pectoral fins

    Authors

    Dae Won Seo ; Joung Hyun Kim ; Hyochul Kim et al.

    Date published

    2008

  • Wave drift added mass of floating bodies measured from a free decay test or a slowly forced oscillation test in waves

    Authors

    Takeshi Kinoshita ; Weiguang Bao ; Motoki Yoshida et al.

    Date published

    2002

    Abstract

    Ocean structures are usually constrained by mooring systems which supply relatively weak restoring forces in horizontal plane. Under the slowly varying drift forces exerted by ocean waves these structures may undergo low-frequency resonant oscillations in the horizontal motion modes i.e. surge sway and yaw. Conventional added mass and damping can be obtained by solving a linear radiation problem in which the body of the structures is forced to oscillate in the calm water. When the frequency of the resonant motion is very small the wave-radiation damping is negligibly small while the added mass is the same order of the displaced water mass. However when a body is slowly oscillating in waves there is another source of added mass and damping the so-called wave drift added mass and wave drift damping. Different from the conventional added mass and wave-radiating damping they are quadratic forces in wave amplitude. The wave drift added mass is measured using a free decay test or a forced slow oscillation test. The model is either a circular cylinder or an array of four circular cylinders. Experimental parameters are systematically changed to examine their effects on the wave drift added mass. A calculation based on the potential theory is also carried out. Measured wave drift added mass are presented and compared with the results calculated. A description of the experiment arrangement and a brief discussion on the analysis method of measured data are presented. These are followed by some discussion on the method of calculation. Experimental results are shown94462 Wave drift force and drift motion of the bow part of broken ship

    Authors

    Takeshi Kinoshita ; Weiguang Bao ; Motoki Yoshida et al.

    Date published

    2002

  • Developing strategies and tools for the efficient trial and acceptance of marine and weapon systems in an integrated electric propulsion warship

    Authors

    Lt Roy Utting ; Sophie Shaughnessy ; Lt Paul Carroll

    Date published

    2006

    Abstract

    The constant drive to reduce costs and the sheer scale of shore testing facilities required for large scale IEP projects such as the UK's Future Aircraft Carrier (CVF) have meant that the risk associated with testing and acceptance is being driven towards the harbour and sea trials phases of a ship's life. This paper discusses how best to understand manage and mitigate these risks through an examination of the implications of aligning of alignment marine system acceptance with overall combat system acceptance. Starting with a review of the factors influencing the timing of IEP system integration testing and trials comparison is then made with the current status of weapon system acceptance with overall combat system acceptance. Starting with a review of the factors influencing the timing of IEP system integration testing and trials comparison is then made with the current status of weapon system acceptance in the Royal Navy. Lessons from recent trials in RN ships and the development of a quick look analysis software package to prove weapon system performance have been used to illustrate some aspects of the interaction between the combat and IEP systems alongside the possible benefits of an interface between the combat system highway and PMS. In conclusion the paper identifies that a full characterisation of the performance of marine systems in an IEP ship will increasingly be linked to the proving of the combat system and therefore the acceptance of boX37755 Developing systems for successful pro-active environmental management P Lightburn ; A Mitchell

    Authors

    Lt Roy Utting ; Sophie Shaughnessy ; Lt Paul Carroll

    Date published

    2006

  • The Marine Turbine 1928 - 1980. (Part 1, 2 & 3) (Each part also in Swedish) 'A historical review by a Swedish engineer. The days of the very large ships. Development of merchant marine steam and gas turbines.'

    Authors

    Ingvar Jung

    Shelf Location

    209a

    Abstract

    The first volume contains sections on: Steam ships (oil and gas carriers, container ships, passenger liners, market merchant ship machinery after World War II), Designs of the leading international marine turbine makers (American, British, Japanese and West German), Development of the Swedish marine turbine 1915-1965 (De Laval, P1, 2 and 3 machinery), Swedish turbine production 1965-1980 (Stal-Laval AP machinery) and The Gas turbine goes to sea (use of supercharged diesel engines, jet engine, gas turbines for merchant and naval ships). The second volume contains sections on: Turbine development in the U.S. Navy, Royal Navy (destroyers, battleship machinery, aircraft carrier, cruiser) and Japan, Naval turbine manufacturers in Continental Europe, Warship machinery from the Swedish de Laval Company and The fastest, biggest and last on North Atlantic run (Luisitania and Mauretania, Leviathan, Bremen and Europa, Normandie, 'Queen Mary' and 'Queen Elizabeth' and 'Queen Elizabeth 2). The third volume contains sections on: 'Turbinia', British naval turbine developments 1899-1927 (Parson's destroyers, Turbin-driven cruisers and capital ships, battle cruisers, the 'Hood'), First turbine ships in the Swedish Navy (Hugin, Munin' and 'Sverige'-class ships), Developments in the USA 1897-1927 (first turbine ships, 'Neptune', turbo-electric machinery, 'Salt Lake City' and the 'Great Disc-Flutter', Short biographies of turbine pioneers 1897-1927.

    Authors

    Ingvar Jung

    Publisher

    Trustees of the National Maritime Museum ; Maritime Monographs and Reports No 61 - 1986.

    Catalogue number

    UNK

    Shelf Location

    209a

    Date published

    1987

  • Asbestos on Ships : How to manage it safely

    Authors

    Lloyd's Register : Robin Townsend

    Shelf Location

    346e

    Abstract

    Lloyd’s Register introduces guidance to assist with the safer management of asbestos in ships (March 2013) Asbestos remains a problem in shipping. Despite better management and reduced production of asbestos, there remains considerable room for improvement, primarily to reduce the number of deaths. It is still estimated that more than 107,000 people die each year from mesothelioma, lung cancer and asbestosis – the three major asbestos-related diseases – as a result of occupational exposure. The report’s author, Robin Townsend, Lloyd's Register’s Regulatory Affairs Lead Specialist, says: “Far from being a problem of the past, asbestos is still produced in many countries and is still widely used, and it is present in many existing buildings and structures, including ships. Most countries still do not have effective prohibitions and global production is still over 40% of peak values. It is imperative that we see further and substantial improvements in regulatory enforcement and a reduction in asbestos related mortality.” The guide takes a wider look at asbestos, exploring its history, composition and health effects to underline the vital importance of correct management. It also details asbestos-related regulation and suggests tools that can be used to achieve best practice in asbestos management. Ships often have an increased risk of asbestos exposure. The use of asbestos in shipbuilding has been unusually high over the years and some of the most dangerous asbestos application methods have been particularly prevalent in ship construction. A UK study estimated a 61% increased incidence of asbestos related illness in shipyard workers. A similar study in Trieste, Italy, showed that of 153 men who had died of malignant mesothelioma 99 had worked in shipbuilding 19 had been in the navy/merchant marine and 7 had been dockworkers. “What is vital is that we continue to guard against the risks that asbestos presents within the maritime industry, and we very much hope this publication will further in this aim,” added Robin.

    Authors

    Lloyd's Register : Robin Townsend

    Publisher

    Lloyd's Register

    Shelf Location

    346e

    Date published

    2013

  • On quasi-static crushing of thin-walled steel structures in cold temperature: Experimental and numerical studies

    Authors

    Jeom Kee Paik; Bong Ju Kim; Dae Kyeom Park; Bong Seok Jang

    Publisher

    Elsevier; 2011

    Abstract

    The aim of the study reported herein was to investigate the effects of low temperatures on the crushing characteristics of steel plated structures. The motivation of this study is for the analysis of ship collisions in Arctic waters. A series of tensile coupon tests were performed to examine their material behaviour at low temperatures, and then quasi-static axial crushing tests were carried out on thin-walled square tubes. The test tubes were made of ASTM A500-type carbon steel, and both the tensile coupon tests of the material and the crushing tests of the tubes were performed in a liquid nitrogen cooled chamber. To reflect the conditions of the Arctic environment more realistically, the tensile coupon tests of the material were also carried out in a dry-ice cooled chamber. LS-DYNA nonlinear finite element method simulations applying a practical approach of modelling techniques were performed to investigate the structural crashworthiness of the thin-walled steel tubes numerically. The tests in the liquid nitrogen cooled chamber showed that the fracture strain of the material was not affected (reduced) by temperatures as low as 80C, although fracture strain was significantly reduced below 100C. The fracture strain results obtained in the dry-ice cooled chamber, however, show this strain to be affected (reduced) by low temperatures even between 0C and 80C, which is equivalent to the Arctic environment. It was also observed that fracture occurs in thin-walled tubes under crushing loads at low temperatures. The LS-DYNA computations also detected the fracture behaviour of test tubes in cold temperatures in a relevant way.

    Authors

    Jeom Kee Paik; Bong Ju Kim; Dae Kyeom Park; Bong Seok Jang

    Date published

    2011

    Publisher

    Elsevier; 2011

  • The Greenwich Forum IX 'Britain and the Sea:Future Dependance, Future Opportunities'

    Authors

    conference organisers, A. J. Smith, Lady Elizabeth Kennet, M. B. F. Ranken; editor of proceedings, M. B. F. Ranken

    Shelf Location

    225c

    Abstract

    Proceedings from The Greenwich Forum IX Conference 'Britain and the Sea:Future Dependance, Future Opportunities', held at the Royal Naval College, London 14 - 16 September 1983. Papers are: Does London have a future as a world maritime centre Economic development on land or at sea Opportunities arising from North Sea development The maritime trade and transport scene today and in the future Offshore oil: responses to employment opportunities Global maritime services The sea's non-living resources present and future Living resources: utilisation and management Defence and civil power: interaction and interdependence The United Nations Law of The Sea Convention of 1982: prospects for Europe Japan in the eastern sea North-south co-operation: the Caracas declaration and unctad The case for the convention: an American view British sea policy: past achievements and future prospects Background papers are : The maritime transport industry Inland waterways in Great Britain The UK Continental Shelf: oil and gas activities The UK fish catching sector: basic problems with a need for the restructuring of the fleet The free world's sea dependance: security of use in peace, defence in war The British shipbuilding industry The British marine equipment industry The death of a tradition A trade union view of change in the shipping industry British ports industry Ports, ships and technological change The work of the IMO related to maritime safety and pollution prevention Survey of oil pollution around the coasts of the UK The role of the classification societies in the setting and maintaining of standards of ship design and condition Marine insurance: the backbone of world shipping The P and I club

    Authors

    conference organisers, A. J. Smith, Lady Elizabeth Kennet, M. B. F. Ranken; editor of proceedings, M. B. F. Ranken

    Publisher

    Edinburgh ; Scottish Academic Press Ltd

    ISBN number

    707303532

    Shelf Location

    225c

    Date published

    1984