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1898 results Most recent
  • A comparison between Royal Princess and an equivalent SWATH ship

    Authors

    A H Jones

    Publisher

    IMarE Conferences and Symposia

    Abstract

    A preliminary design was craeted for a SWATH vessel intended to carry 1200 passengers in a cruising role between West Coast North America and the Orient. The arrangement was based on the P&O cruise liner Royal Princess and the hull design was based on trends shown in a number of small SWATH ships currently in commercial service. The article discusses the results of trials undertaken.

    Authors

    A H Jones

    Date published

    1988

    Publisher

    IMarE Conferences and Symposia

  • A concept for a fast ship stabilised by hydrofoils

    Authors

    V Bertram ; E Mohr

    Publisher

    IMarE Conferences and Symposia

    Abstract

    Paper investigating the advantages of the hydrofoil small waterplane area ship (HYSWAS) for high-speed vessels. The design features the good seakeeping qualities of a SWATH design without the disadvantages. For low speeds two side floaters turn the design into a trimaran with sufficient static stability while for high speeds the floaters are lifted and the design becomes a monohull with low total resistance. Dynamic stability and lift are provided by hydrofoils. Structural complexity cavitation and virtually inertia-free control of the hydrofoils are the major problems of the HYSWAS design.

    Authors

    V Bertram ; E Mohr

    Date published

    1991

    Publisher

    IMarE Conferences and Symposia

  • A control and guidance system for ships in port approaches

    Authors

    R S Burns ; M J Dove ; K M Miller

    Publisher

    IMarE Conferences and Symposia

    Abstract

    An account of the processes used in modelling a Plymouth Polytechnic test vessel in the development of a voyage management system for marine vehicles is presented. Also described is the design and implementation of the guidance system. Results from the commissioning trials are given together with a discussion on the subsequent performance evaluation.

    Authors

    R S Burns ; M J Dove ; K M Miller

    Date published

    1988

    Publisher

    IMarE Conferences and Symposia

  • A decision support expert system for ship sales/purchase

    Authors

    N P Kyrtatos ; J Tsolkas ; G Molin

    Publisher

    IMarE Conferences and Symposia

    Abstract

    A description is given of a software system intended to assist prospective buyers of a ship to evaluate the condition of the vessel its machinery and taking account of the buyer's requirements estimate the necessary cost of repairs. Thus it can act as an additional standardised reference point in making an offer. The system provides estimates on the total cost of required repairs and produces a report in standardised format to be used as a reference. A prototype version of a subset of the system is presented.

    Authors

    N P Kyrtatos ; J Tsolkas ; G Molin

    Date published

    1989

    Publisher

    IMarE Conferences and Symposia

  • A Diagnosis Method with Deep Reasoning in a Marine Expert System

    Authors

    K Byung-Duck ; R Keel-Soo ; H Ju-Sik

    Publisher

    IMarE Conferences and Symposia

    Abstract

    This paper presents a model-based diagnosis method for an engine fault-finding system locating a set of fault candidates through identifying and refining the set of differences between the device and its model. A structure model showing component connections and a behaviour model with situational component representations are used in tandem for fault diagnosis. An example using diesel engine performance is presented.

    Authors

    K Byung-Duck ; R Keel-Soo ; H Ju-Sik

    Date published

    1990

    Publisher

    IMarE Conferences and Symposia

  • A fire insulating fibre for the 21st century

    Authors

    A T Beeston

    Publisher

    IMarE Conferences and Symposia

    Abstract

    SAF (Soluble Amorphous Fibre) has been developed to combine high-temperature performance with body solubility low smoke emission and relatively light weight and to provide a product range suitable for use in passive fire protection. Its preparation properties and applications in steel and aluminium ship construction are described and compared with those of traditional MMMF (man made mineral fibre) insulators particularly mineral wools and RCF (Refractory Ceramic Fibres).

    Authors

    A T Beeston

    Date published

    1994

    Publisher

    IMarE Conferences and Symposia

  • A low budget / low risk IFEP for frigates

    Authors

    H W Rahn ; J Schacht

    Publisher

    IMarE Conferences and Symposia

    Abstract

    The requirements for integrated full electric propulsion (IFEP) in a frigate are analysed especially with reference to survivability noise levels cost aspects and risks. Problem analysis and current propulsion systems for the German Navy are discussed. The electric 2-motor and electric 4-motor concepts are compared. The 4-motor concept has low vulnerability high functional redundancy low development risks and low procurement costs. A qualitative assessment of the development requirements and risks for the main components of the 4-motor concept is described.

    Authors

    H W Rahn ; J Schacht

    Date published

    1998

    Publisher

    IMarE Conferences and Symposia

  • A Low Maintenance Fire-Resistant Glass Reinforced Plastic Piping Support and Walkway Systems for Marine and Offshore Use

    Authors

    J Guiton

    Publisher

    IMarE Conferences and Symposia

    Abstract

    This paper discusses the performance of an all glass reinforced plastic weather deck system for tankers after four years of sea trials in the North Sea. The development of a similar system with modifications to meet new statutory regulations is described. Initial costs and a step-by-step implementation are detailed.

    Authors

    J Guiton

    Date published

    1991

    Publisher

    IMarE Conferences and Symposia

  • A Method of Fault Diagnosis for Shafting by Vibration Spectrum

    Authors

    M Zhao ; Z H Luo

    Publisher

    IMarE Conferences and Symposia

    Abstract

    In order to avert accidents caused by faults in rotating shafts a monitoring and fault diagnosis system comprising signal sampling pre-processing and diagnosis is proposed. The method of direct pattern identification by fuzzy mathematics is adopted. In this paper a crack on the shafting is used as an illustrative example.

    Authors

    M Zhao ; Z H Luo

    Date published

    1990

    Publisher

    IMarE Conferences and Symposia

  • A methodology for performing offshore fire risk analyses

    Authors

    K Greening ; F J Deegan

    Publisher

    IMarE Conferences and Symposia

    Abstract

    This paper describes the methodology developed by British Gas to perform the Fire Risk Analysis study as required by Lord Cullen in the Piper Alpha report. The analysis will form a major part of the British Gas Offshore Safety Case. The analysis first establishes a frequency of both fires and explosions then assesses their consequences in relation to various components of the safety systems and structural integrity of the installation. An analysis of the impairment to TSRs and evacuation / escape equipment is the last step.

    Authors

    K Greening ; F J Deegan

    Date published

    1992

    Publisher

    IMarE Conferences and Symposia

  • A model-reference neural autopilot for ships

    Authors

    A G M Zirilli ; G N Roberts ; A Tiano et al.

    Publisher

    IMarE Conferences and Symposia

    Abstract

    A way for the synthesis of a model reference adaptive autopilot for a containership through the use of neural networks is presented. The system's behaviour is defined by the model reference through a setting of specific parameters while the neural controller is properly trained to comply with the desired performances. First a look is taken at the ship mathematical model. Next the model reference adaptive system is considered. After this the controller design is looked at including back-propagation algorithm and adaptive controller. Lastly simulation and results are discussed.

    Authors

    A G M Zirilli ; G N Roberts ; A Tiano et al.

    Date published

    1999

    Publisher

    IMarE Conferences and Symposia

  • A model to optimise the electrical and economic performance of tidal current energy conversion systems

    Authors

    G T Melville ; K Rados ; I G Bryden

    Publisher

    IMarE Conferences and Symposia

    Abstract

    A method and subsequent computational model for optimising the electrical and economic performance of tidal current turbines with regard to their location are presented. The optimisation model includes the main mechanical and electrical design parameters of tidal current turbines using hydrographic and environmental data to forecast the performance and the cost of energy produced. After some background information a look is taken at the method covering hydrodynamic tidal current modelling and electrical/economic optimisation. Next a case study is given. Lastly results are discussed including tidal simulation filtered locations and parametric design/cost optimisation.

    Authors

    G T Melville ; K Rados ; I G Bryden

    Date published

    2001

    Publisher

    IMarE Conferences and Symposia

  • A modern European harbour complex for the 1990s

    Authors

    M van den Doel

    Publisher

    IMarE Conferences and Symposia

    Abstract

    Prospects for a large integrated European harbour/port complex of the future to include all port facilities cargo handling at specialised terminals cargo storage port industries (oil chemicals steel) and extensive hinterland connections are discussed

    Authors

    M van den Doel

    Date published

    1984

    Publisher

    IMarE Conferences and Symposia

  • A neural network autopilot for ship control

    Authors

    N A Witt ; K M Miller

    Publisher

    IMarE Conferences and Symposia

    Abstract

    This paper briefly describes modern adaptive methods of ship control and introduces intelligent control which consists of three methodologies - expert control fuzzy logic and neural control. By comparing the relative merits of each approach this paper shows that the neural network is the most appropriate. The results of implementation and trial results are compared with traditional control methods. The paper concludes by proposing strategies for further research into track control. Traditional optimal or predictive techniques are considered satisfactory for implementation but neural methods are used to make the algorithms adaptive.

    Authors

    N A Witt ; K M Miller

    Date published

    1993

    Publisher

    IMarE Conferences and Symposia

  • A new tool for designing quiet low vibration main propulsion gears

    Authors

    P Maillardet ; D A Hofmann ; M E Norman

    Publisher

    IMarE Conferences and Symposia

    Abstract

    Naval main propulsion gearing must be both reliable and very quiet. A calculation procedure Design Unit-Gear Analysis for Transmission Error and Stress (DU-GATES) is described which facilitates the optimisation of gear geometry for low noise at the design stage. The FE electric mesh model described has been shown to be a useful tool for improving the geometric design of marine gearing. In particular tooth profile and lead modification may be optimised for a range of torques and misalignments to minimise quasi-static transmission error and bearing load variation while maintaining acceptable load distribution and hence gear stress. The technique described can be applied to single and double helical gears with thrust bearings or thrust cones and is capable of modelling all significant geometric and elastic contributions to tooth contact behaviour.

    Authors

    P Maillardet ; D A Hofmann ; M E Norman

    Date published

    1996

    Publisher

    IMarE Conferences and Symposia

  • A practical assessment of steel hatch covers and their problems

    Authors

    J van Havre

    Publisher

    IMarE Conferences and Symposia

    Abstract

    Weather tightness of steel hatch covers their design wear inspection and assessment of effectiveness are discussed

    Authors

    J van Havre

    Date published

    1977

    Publisher

    IMarE Conferences and Symposia

  • A rational approach to fire safety of offshore installations

    Authors

    R Cazzulo ; C Murgia ; F Ziliotto

    Publisher

    IMarE Conferences and Symposia

    Abstract

    This paper provides an overview of European fire safety programmes on offshore structures and highlights the need to integrate all aspects of safety management. A research project into a design approach to fire safety has been developed to cover three main areas which include the development of standardised fire hazard scenarios for topsides development of tools for the cost / benefit optimisation of layout design with respect to fire safety harmonisation of existing regulations and updating of guidelines.

    Authors

    R Cazzulo ; C Murgia ; F Ziliotto

    Date published

    1992

    Publisher

    IMarE Conferences and Symposia

  • A report on field trials of a novel wet scrubber for marine diesel engines

    Authors

    A Trivett ; G MacDonald ; G Trivett

    Publisher

    IMarE Conferences and Symposia

    Abstract

    Marine Energy Limited (MEL) has developed a novel technology suited to ship engine exhaust gas scrubbing. The MEL exhaust removes soot SO2 a small percentage of NOx and a large proportion of waste heat from exhaust. Pilot plant trials of the technology were recently completed aboard the Canadian Coast Guard Icebreaker Louis S St Laurent. Test methodology is outlined and results for heat recovery gas analysis and particulate analysis are presented.

    Authors

    A Trivett ; G MacDonald ; G Trivett

    Date published

    1999

    Publisher

    IMarE Conferences and Symposia

  • A Review of the Critical Aspects of the Piper Alpha Disaster

    Authors

    I M Barrett

    Publisher

    IMarE Conferences and Symposia

    Abstract

    This introductory paper covers legal and moral aspects of the Piper Alpha disaster as well as reviewing events leading to the explosion contributory factors hydrates and future directions and regulations.

    Authors

    I M Barrett

    Date published

    1991

    Publisher

    IMarE Conferences and Symposia

  • A role for swaged pile/sleeve connections in the installation of offshore jackets

    Authors

    W Mayor

    Publisher

    IMarE Conferences and Symposia

    Abstract

    The development of swaged pile/sleeve connections its acceptance by certifying authorities and potential use for jacket installations are examined. Normally developed for lightly loaded subsea structures the simple structure has now been adapted for heavier load limits. Topics include acceptable load capacities the strength of multiple groove connections cyclic performance of the connections reduced weight sleeves load/deflection performance and current operating experience.

    Authors

    W Mayor

    Date published

    1993

    Publisher

    IMarE Conferences and Symposia