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The Effect of the Wave-Current Interaction on Second Order Drift Loads
AuthorsM R Martins ; J A P Aranha ; H L Brinati et al.
Date published2000
AbstractThe aim of this work is to analyze the effect of the wave-current interaction on the second order drift loads acting on the unit. This analysis permits to estimate the influence of the wave-current interaction on the second order motion of the floating unit. One VLCC (Very Large Crude Carrier) operated by PETROBRAS in deep water is used to illustrate numerically the wave current interaction effect on the second order drift loads acting on the unit. For this analysis is used some wave and current data of the Campos basin and North Sea.
AuthorsM R Martins ; J A P Aranha ; H L Brinati et al.
Date published2000
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The Influence of Heave Motion on the Damping Force of a Mooring Line
AuthorsJ Fan ; X Chen ; X Huang
Date published1998
AbstractIn this paper we presented some investigations on the influence of heave motion on the damping of a mooring line. The variation of the dissipated energy of mooring line damping force was calculated in the time domain with the different upper end motions which were composed of a low frequency surge motion and the wave frequency heave motion. From the results we found that the wave frequency heave motion has significant effect on the damping of the mooring line on the low frequency surge motion. With the increase of amplitude and frequency of the heave motion the damping of the mooring line increases. So in estimating the damping of mooring line on the low frequency surge motion the effect of wave frequency heave motion should be taken into account.
AuthorsJ Fan ; X Chen ; X Huang
Date published1998
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The methods of analytical representation for dependencies of WIG-craft aerodynamic characteristics on parameters of its motion and the results of experimental investigation of basic configuration elements geometry influence on stability of longitudinal mo
AuthorsL D Volkov ; D A Iosafov
Date published2000
AbstractThe methods of analytical representation for dependencies of WIG-craft aerodynamic characteristics on parameters of its motion are examined. Firstly the method of determining a WIG's aerodynamic coefficients as functions of flight altitude variation rate is considered. Then the position of centre of height at large heights of a WIG-craft's flight is investigated. Finally the results of experimental investigation of basic configuration elements' geometry influence on the stability of longitudinal motion are presented.
AuthorsL D Volkov ; D A Iosafov
Date published2000
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Ultra-low emission gas turbine combustion: an experimental investigation of catalytically stabilised lean pre-mixed combustion on modern gas turbine conditions
AuthorsJeevan Jayasuriya ; Anders Ersson ; Sven G Jaras et al.
Date published2004
AbstractThe experimental study and investigations are described that have been carried out on catalytic combustion under gas turbine operating conditions. Experiments were designed to focus on the operational behaviour of single catalytic segments as well as combinations of them under different experimental conditions. Two types of fuels methane and simulated mixture of gasified biomass were considered separately for a series of catalytic combustion tests. Some of the initial results are presented. The results from this study highlight the influence of pressure space velocity air fuel ratio and air inlet-temperature on ignition combustion stability and emissions. The purpose is to gain experimental data-knowledge on the operational behaviour of different types of combustion catalysts under gas turbine operation conditions. Eventually the knowledge will be gathered together to design catalytic combustors for gas turbines running on natural gas and gasified biomass.
AuthorsJeevan Jayasuriya ; Anders Ersson ; Sven G Jaras et al.
Date published2004
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Dynamic stability research of HYSWAS on foil borne
AuthorsW Liu
Date published2002
AbstractThe linearised non-dimensional equation of small perturbation motion of HYSWAS (hydrofoil small water area high-speed ship) and its Eigen equation on foil borne is developed. The discriminance and quality criterion of dynamic stability based on the Eigen root is expressed. The influence is discussed of inertia factors dynamic stability derivatives and drafts on the dynamic stability of HYSWAS on foil borne. Several practical conclusions are obtained.
AuthorsW Liu
Date published2002
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Field measurements on the holding power of mooring anchors
AuthorsYoshi-hiko Maeno ; Motoyasu Ishikawa ; Yuji Kumagai et al.
Date published2001
AbstractField verification of the holding power of mooring anchors was conducted on a seabed composed of silt and sand located in Maizuru Bay Kyoto Japan. The observed holding power of the anchors was compared with estimates based on the current design. The holding power depends strongly on the properties of the seabed deposit the type of anchor and the duration of service. The coefficient of holding power which is defined as the ratio of the maximum holding power to the submerged weight of the anchor was introduced to examine the effects of the loading speed and angle of the mooring wire on the anchors.
AuthorsYoshi-hiko Maeno ; Motoyasu Ishikawa ; Yuji Kumagai et al.
Date published2001
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Measurement of pressure distribution and cavity shape on conventional and highly skewed propeller model
AuthorsY Ukon
Date published1990
AbstractThis paper describes two kinds of highly advanced measurement techniques. One is the measurement of pressure distribution on the blades of propeller models working in uniform flow and non-uniform flow behind a wire mesh screen under non-cavitating conditions. The other is the measurement of cavity thickness distribution on the propeller blades working behind a complete ship model. Each measurement was performed on a conventional and a highly skewed propeller. Accurate measurements have provided invaluable data to validate the numerical techniques on propellers and cavitation.
AuthorsY Ukon
Date published1990
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On board treatment of ballast water (technologies development and applications)
AuthorsPeilin Zhou ; Vassilios Lagogiannis
Date published2003
AbstractOutlines are given of on board treatment of ballast water options being researched the project's timeframe the project's aims and research methods. Results of a feasibility study on a thermal plant installation on an oil tanker are presented. The feasibility study aimed to conduct a preliminary design of an apparatus to perform rapid heat treatment for the incoming ballast water of an oil tanker. Based on the results of this study and design a cost analysis is conducted along with recommendations for further development of such a system.
AuthorsPeilin Zhou ; Vassilios Lagogiannis
Date published2003
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On-Line Control Algorithm Based on Reliability Methods
AuthorsB J Leira
Date published1998
AbstractStrategies for decision making related to feed-back control of nonstationary slowly-varying stochastic processes are discussed. Minimization of the number of corrective actions is crucial for the class of problems at hand due to significant costs related to activation of the control itself. As an example of application control of top and bottom riser angles during drilling by repositioning of the surface vessel is looked at.
AuthorsB J Leira
Date published1998
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Study on the possibility of inland waterway transport on the Ishikari river
AuthorsK Takahashi ; N Usami ; T Shibata et al.
Date published2003
AbstractAlthough the Ishikari river has potential as an avenue for inland transport and its basin is dotted with large cities these cities generally rely on trucks to move goods to and from nearby ports. The possibility is examined of using the Ishikari River for inland waterway transport by looking at the economics involved and the river's physical suitability. First a look is taken at cost reductions through inland waterway transport. Next route considerations are addressed.
AuthorsK Takahashi ; N Usami ; T Shibata et al.
Date published2003
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Wave-Induced Loads on Offshore Platform Decks
AuthorsJ Gronbech ; M J Sterndorff
Date published2000
AbstractThe present paper concerns the wave-induced loads on the cellar deck of a typical jacket platform. The wave-induced loads on a platform deck depend to a great extent on the shape of the surface and the associated particle velocities of the extreme waves. Thus the choice of the wave surface or wave theory is very important. This paper addresses the effects of wave steepness and directional spreading on the wave-induced loads. Two types of deterministic waves are considered - the traditional Stokes 5th order wave and the alternative NewWave model suggested by Tromans et al. (1991).
AuthorsJ Gronbech ; M J Sterndorff
Date published2000
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BSRA Technical Memorandum No. 128 Reports on foreign observers' course on the nuclear ship 'Savannah'. Health Physics
AuthorsJ A Dodd ; S Macdonald
Shelf Locationin storage
AuthorsPublisherJ A Dodd ; S Macdonald
British Ship Research Association
Shelf LocationDate publishedin storage
1960
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BSRA Technical Memorandum No. 129 Reports on foreign observers' course on the nuclear ship 'Savannah'. Ship Design
AuthorsJ A Dodd ; S Macdonald
Shelf Locationin storage
AuthorsPublisherJ A Dodd ; S Macdonald
British Ship Research Association
Shelf LocationDate publishedin storage
1960
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Report No. R.2: Report on Hogging and Sagging Tests on Riveted Tanker M.V. "Newcombia"
AuthorsThe Admiralty Ship Welding Committee
PublisherHis Majesty's Stationery Office
AuthorsDate publishedThe Admiralty Ship Welding Committee
1948
PublisherHis Majesty's Stationery Office
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Conf on - In-Water Maintenance on Ships London 15 Jan 1975
PublisherIMarE Conferences and Symposia
Date published1975
PublisherIMarE Conferences and Symposia
Date published1975
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Conf on - training and distance learning on board ships 24 March 1982
PublisherIMarE Conferences and Symposia
Date published1982
PublisherIMarE Conferences and Symposia
Date published1982
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Berlingieri on Arrest of Ships A Commentary on the 1952 and 1999 Arrest Conventions 3rd Edition
AuthorsF Berlingieri
PublisherLLP
AuthorsDate publishedF Berlingieri
2000
PublisherLLP
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Conf on - IMAS 94 Fire Safety on Ships Developments into the 21st Century London 26-27 May 1994
PublisherIMarE Conferences and Symposia
Date published1994
PublisherIMarE Conferences and Symposia
Date published1994
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MFV Rotche ON FR965 and MFV Stroma II ON FR156 Report of Court No S500 - The Merchant Shipping Act 1894 Formal Investigation
AuthorsHMSO
PublisherHMSO
AbstractReport into the circumstances surrounding the collision of MFV Rotche and MFV Stroma II on or about 8 July 1977 of Mallaig.
AuthorsHMSO
PublisherHMSO
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Batteries on ships
AuthorsN E Bagshaw
Shelf Location203e
AbstractFor the benefit of specialist designers, engineers and chemists, as well as manufacturers and users of the equipment concerned, this book aims to give specific details of the battery types used in each field of applications, as well as their performance. The book includes sections on the general purpose of batteries on ships, small special purpose batteries on ships, submarine propulsion batteries and torpedo propulsion batteries.
AuthorsPublisherN E Bagshaw
Research Studies Press
Shelf LocationDate published203e
1982