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Experimental Results and Predictions on Crack Growth in a Structural Steel Under Periodically Applied Single and Multiple Overloads
AuthorsM Skorupa ; A Skorupa ; A Zachwieja et al.
Date published1998
AbstractThe paper presents preliminary results of a research program on fatigue crack growth in a low-carbon steel under a variable amplitude loading. First test results are reported on crack growth under simple loading sequences containing single and multiple tensile overloads applied periodically between smaller base-line constant amplitude cycles. Next the observed crack growth behavior is compared to predictions from a theoretical model developed by the authors.
AuthorsM Skorupa ; A Skorupa ; A Zachwieja et al.
Date published1998
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FPSO verification schemes - experience on the UK continental shelf
AuthorsT Koliopulos ; W Winkworth
PublisherIBC Technical Services Ltd Energy Division
AbstractThe Verification Scheme is a process of hazard management to reduce risk by addressing the performance of critical systems which should be reviewed and revised as often as necessary to ensure their effectiveness. The objectives of FPSO (floating production storage and offloading units) verification are presented as well as issues to be addressed based on Lloyd's Register's experiences in providing services to meet legislative and project specific requirements. A structured approach is outlined for providing FPSO verification based on lessons learnt and client feedback.
AuthorsDate publishedT Koliopulos ; W Winkworth
1997
PublisherIBC Technical Services Ltd Energy Division
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Global Warming and the World's Oceans - The Millennium Outlook
AuthorsG T Westbrook
Date published2000
AbstractThis paper revisits areas covered in earlier papers and provides an update of significant developments based on additional years research and analysis on the hydrosphere cryosphere and atmosphere. Additional spheres discussed include the biosphere and coral reefs and the heliosphere and Earth's magnetosphere. The emphasis in this talk focuses on the incompleteness of the science in several key areas. In spite of this situation policy development continues on many fronts. A review is made of ongoing policy developments on this issue including the Bonn meeting in November and the potential for U. S. ratification.
AuthorsG T Westbrook
Date published2000
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Heating and Cooling on Board for Yachts and Small Craft
AuthorsE Lamprecht
Shelf Location203c
AbstractThe book considers factors involved in choosing and installing heating system on board (whether air or water systems, cooking, the fuel to be used, safety regulations) and refrigeration and air-conditioning on board (refrigerating foodstuffs, refrigeration using a compressor, types of refrigeration, chest/fridge freezer, hot air heating system used for air conditioning, appliances, central air conditioning equipment).
AuthorsPublisherE Lamprecht
London ; Adlard Coles Nautical
Shelf LocationDate published203c
1993
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House of Lords Select Committee on Science and Technology Session 1995-96 3rd Report Decommissioning of oil and gas installations
AuthorsSelect Committee on Science and Technology
Shelf Location226c
AbstractThe background and options for decommissioning of oil and gas installations are outlined. The views of witnesses to the select committee on environmental effects, technical feasibility, health and safety, safety of other users of the sea, cost implications, public acceptability, decision-making framework, scrutiny of operations and monitoring of remains and liability for residues are presented. The conclusions and recommendations of the committee are outlined.
AuthorsPublisherSelect Committee on Science and Technology
London: HMSO
Shelf LocationDate published226c
1996
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Influence of fuel properties on combustion and emissions of medium speed marine diesel engine
AuthorsK Shiode ; M Kikuchi ; M Kuwabara et al.
Shelf Location215d
AbstractFuel properties' influence on combustion exhaust gas emissions and surface temperature of a combustion chamber was explored by the burning test of various residual fuels with a medium speed super-charged 4 stroke-cycle marine diesel engine. Test data was analyzed and evaluated on ignition delay NOx emissions and cylinder liner temperatures from the CCAI (Calculated Carbon Aromaticity Index) viewpoint. Test results and findings are described.
AuthorsDate publishedK Shiode ; M Kikuchi ; M Kuwabara et al.
1995
Shelf Location215d
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Influence of the wave-current interaction on drift loads in FPSO
AuthorsM R Martins ; H L Brinati ; J A P Aranha et al.
Date published1999
AbstractAn attempt is made to present a procedure for the numerical evaluation of the wave-current interaction and to show its effect on the determination of the total environmental load and on the equilibrium position of the vessel. After some introductory information a look is taken at the mathematical model. Next illustrative examples using two FPSOs are considered.
AuthorsM R Martins ; H L Brinati ; J A P Aranha et al.
Date published1999
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Information Technology - internal management of complex information on a global scale
AuthorsP Cooney
Shelf Location213e
AbstractThe information requirement for safe efficient and effective ship management is examined with an overview of the many and varied types of information involved (including data on safety position monitoring performance monitoring commercial factors freight and hire collection charter compliance cargo technical aspects crew and accounting): the advantages of using a fully integrated information technology system based on good local and global communication links for information collection strorage and analysis is stressed. The innovative AIMS (Acomarit Integrated Management System) developed by Acomarit
AuthorsPublisherP Cooney
The Connecticut Maritime Association Inc
Shelf LocationDate published213e
1995
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Investigation into the amounts of residue remaining on board a chemical tanker after cargo discharge and subsequent tank washing procedures
AuthorsN Hurford ; J A Nichols
Shelf Location226a
AbstractThis report describes experiments carried out on an ocean going chemical parcel tanker to determine typical residues remaining on board (Rob) and to investigate present tank washing procedures. The results are presented and an empirical formula is derived for the calculation of ROB’s for this type of ship.
AuthorsPublisherN Hurford ; J A Nichols
Department of Industry
Shelf LocationDate published226a
1977
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Laboratory study on the interaction between regular obliquely incident waves and vertical walls
AuthorsYu-cheng Li ; Zhao-chen Sun ; Guo-hai Dong et al.
Date published2001
AbstractCharacteristics of wave forces by waves are studied based on a physical model test with regular waves. The ratio of obliquely incident wave forces to normal incident wave forces on unit length of vertical wall is related with various factors. A linear reduction of the mean force of obliquely incident waves is confirmed with an increase in the relative caisson length. Also the characteristics of reflection coefficients of diagonal waves are discussed.
AuthorsYu-cheng Li ; Zhao-chen Sun ; Guo-hai Dong et al.
Date published2001
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Marine environment and its impact on the design of ships and marine structures
AuthorsM K Ochi
Date published1993
AbstractInformation on environmental conditions (wind waves and currents) relevant to the design and safe operation of ships and marine structures is summarised. Results of the author's recent study on stochastic properties and prediction of severe environment pertinent to design application are presented. Finally data and methodologies for providing a uniform source of information are included.
AuthorsM K Ochi
Date published1993
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Mechanical Systems Modeling and Diagnosis Based on Cases
AuthorsS Karamouzis ; S Feyock
Date published2000
AbstractDiagnosis of complex mechanical systems is a challenging task especially when the systems are in operation. This paper presents an approach that it is based on temporal models and case-based techniques. At the core of this approach is retrieval and adaptation of previously experienced problems (cases) similar to the problem at hand. Unlike other approaches this paper presents a common mathematical framework in which mechanical system modeling and case-based diagnosis can be described. Based on this framework a prototype system for dealing with aircraft engine faults has been designed and implemented.
AuthorsS Karamouzis ; S Feyock
Date published2000
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Neftegorsk Earthquake 28 May 1995 Sakhalin Island
AuthorsV V Kharakhinov ; S G Litvinov ; S P Beketsky
Date published1997
AbstractOn 28 May 1995 the Neftegorsk Earthquake took place with magnitude of 7.6 degrees (on Richter scale) on a large part of the territory of Sakhalin Island and on the territory of Khabarovsk Region. It caused terrific consequences in Neftegorsk (being nearest the epicentre) caused visible changes of landscape and led to place damages (breaks) of oil and gas pipelines power lines and numerous serious damages of the narrow-guage railway Okha-Nogliki on a section from Mukhto to Garomay. The earthquake and fault-lines in the region are discussed.
AuthorsV V Kharakhinov ; S G Litvinov ; S P Beketsky
Date published1997
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Nonlinear irregular waves and forces on truncated vertical cylinder in a numerical wave tank
AuthorsS Y Boo ; C H Kim
Date published1997
AbstractA numerical scheme has been developed to predict nonlinear diffractions acting on a floating structure by weakly nonlinear irregular waves. The proposed numerical scheme was verified by comparing linear results with theory and then applied to compute the diffractions acting on a truncated vertical cylinder by inputting the linear and nonlinear irregular waves. Also the numerical scheme was studied by the balance check of the momentum-impulse.
AuthorsS Y Boo ; C H Kim
Date published1997
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Numerical study on forced turbulence in stratification
AuthorsToru Sato ; Kei Sato
Date published2003
AbstractA method for computational reconstruction of fluctuating flows in the small-scale ocean was proposed based on single-point measurement in the real sea. Full-3D LES on the spatial scale of O(100m) is conducted for this purpose. Small-wavenumber components of fluctuation are forced in the whole computational domain and large-wavenumber components evolve freely in the computation. The reconstruction of spatial information from the time-sequential data obtained at a single measurement point is theoretically impossible with no assumptions. Spherically even distribution of energy for large eddies is assumed. The numerical results are compared with the measurement in the time domain and their validity is discussed.
AuthorsToru Sato ; Kei Sato
Date published2003
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On-Sea Experiment and Hydroelastic Analysis of the Mega-Float Phase-II Model
AuthorsK Kobayashi ; S Okada ; C Sato
Date published2001
AbstractIn the second phase research and development project of Mega-Float structures a 1000m-long very large pontoon type model was constructed in Tokyo Bay Japan. The on-sea experiment with this Mega-Float model (1000 x 121 x 3m) has been conducted from September 1999 through December 2000. In this paper firstly an outline of the on-sea experiment and the configuration of measurement system are described briefly. Then some examples of obtained data and analyzed results are presented.
AuthorsK Kobayashi ; S Okada ; C Sato
Date published2001
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On the application of the Time Series in structural failure detection and monitoring for offshore applications
AuthorsC S Li ; W J Ko
Date published1988
AbstractThe theory of Time Series Analysis is discussed with attention to - system observation; mathematical modelling strategy; application of the model in prediction and control; and to the specific methodologies of Auto Regressive (AR) Moving Average (MA) and combined (ARMA) models. The techniques are applied to data obtained from model experiments on a laboratory scale structure of a fixed offshore platform in normal and damaged conditions. Their application in on-line condition monitoring and failure detection in offshore platforms is described with examples.
AuthorsC S Li ; W J Ko
Date published1988
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On the propeller blade turbulisation in model test
AuthorsY S Bazilevsky
Date published2001
AbstractModel test data is analysed which estimates the influence of Reynolds number on open water hydrodynamic characteristics obtained in a deepwater towing tank. The advisability of applying trip wires on the surface of the model propeller blade to demonstrate the truth of propulsion test results is considered. Life and drag coefficient calculations are carried out to estimate CL and CD values as a function of Reynolds number and advance ratio. Results are shown and conclusions drawn. Page 6 is blank and page 7 shows a data table.
AuthorsY S Bazilevsky
Date published2001
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Passenger and crew habitability - notes on how to design for peace and harmony
AuthorsSally McMoris
Date published2001
AbstractIt is important to resolve habitability matters at the design stage. Aspects of noise and vibration control on ships based partly on experience gained within TID (Technical Investigation Department) are discussed. The factors affecting comfort which are directly controllable by naval architects marine engineers and interior designers include - noise and its effects; health and comfort; shipboard noise transmission and control; effects of vibration; and lighting.
AuthorsSally McMoris
Date published2001
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Proposal for Ocean Drilling Program Research on Gas Hydrate in the Gulf of Mexico
AuthorsW W Sager ; M C Kennicutt
Date published2000
AbstractGas hydrate traps large quantities of hydrocarbon gasses on the continental margins and have potentially important effects on sedimentary geology climate slope instability the carbon cycle and offshore oil production. The Ocean Drilling Program (ODP) has expressed interest in coring gas hydrate in a variety of environments including a mature petroleum basin. This article describes a proposal submitted to ODP for a Gulf of Mexico gas hydrate drilling cruise to address this goal.
AuthorsW W Sager ; M C Kennicutt
Date published2000