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Handbook of coastal and ocean engineering : Volume 2 : Offshore structures, Marine foundations, Sediment Processes and Modeling
AuthorsJohn B Herbich, editor
Shelf Location231d
AbstractThis volume of the handbook covers offshore structures, marine foundations, sediment processes and modelling. The first part of the volume provides insights into forces on offshore structures, designs of offshore platforms and pile foundations. The second part deals with marine foundations and sediment processes, including a discussion of marine foundations, sediment transport, shore processes, tidal inlets, scour around structures and sea ice gouging. The third section covers physical and numerical modelling.
AuthorsPublisherJohn B Herbich, editor
Houston : Gulf Pub. Co., 1990-
Catalogue number620.4146
Shelf LocationDate published231d
1991
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Handbook of Industrial Energy Analysis
AuthorsI Boustead ; G F Hancock
Shelf Location207c
AbstractThe handbook shows the methods of analysis required to make calculations of energy needed to manufacture, or needed in any process requiring fuel in its operation. The authors develop the rationale of energy process analysis by discussing, and providing, sets of operational data for energy determination, which are published together in this one volume for the first time. The book is divided into 2 parts. In part 1, the first 8 chapters develop the principles underlying energy analysis with an emphasis on process energy analysis. Chapters 9 to 12 give some detailed examples of how these techniques may be applied in specific industrial cases. They also introduce the potential application of the subject to energy conservation. Part 2 contains a wide selection of primary and secondary data of energy requirements for a wide variety of industrial systems. This has been included because one of the major difficulties encountered by anyone attempting to perform even the simplest analysis lies in obtaining the necessary database. It is hoped that this will provide a useful tool for those carrying out their own analysis.
AuthorsPublisherI Boustead ; G F Hancock
Chichester ; Ellis Horwood Ltd
Shelf LocationDate published207c
1979
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Hatch covers - maintenance and operation with reference to failures in service
AuthorsD Byrne
Date published1995
AbstractThe 1966 International Conference on Load Line (1966 LLC) laid down rules for weathertight steel covers which have been refined by the classification societies. The design process should include primitive system demands key design considerations and principal design requirements such as strength security sealing and support. The sealing system should include the cleats horizontal restraints the seal the coaming compression bar and the drainage arrangements. The number of different parties involved in the supply of hatch covers may lead to decreased quality and other problems. In service defects are mainly caused by human error or inadequate maintenance. Remedial actions suggested include use of check lists.
AuthorsD Byrne
Date published1995
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Hazardous material control and management a key to an effective environmental management system
AuthorsJoseph E Castle ; David A Johnson
Date published2006
AbstractAn update on the US Navy HMC & M (Hazardous Material Control and Management) Program at the installation level is presented. At the heart of the HMC&M Program is the CHRIMP (consolidated hazardous material reutilisation and inventory management program). Under CHRIMP HAZMINCENs (hazardous material minimisation centres) are established and manned (primarily by inventory management personnel) to centrally control the procurement issue turn-in re-use recycling and disposal of HM. Recent Navy EMS (Environmental Management System) initiatives are addressed and it is discussed how the application of HMC&M Program policy principals and procedures can contribute to an effective EMS.
AuthorsJoseph E Castle ; David A Johnson
Date published2006
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Health Safety and the Environment
AuthorsVenkatramen Sheshashayee
Date published2002
AbstractHeavy duty engineering is by its nature hazardous. Although many safe working practices have been introduced to reduce risks there are still too many deaths and injuries in shipyards and engineering sites. Particular hazards are listed and examples of deaths and injuries sustained are given. The issues pertaining to health safety and the environment in the marine industry are considered with specific reference to marine coatings. It is concluded that it is imperative that managers users buyers and supplier to the marine industry understand and appreciate the importance of a worldwide programme on health and safety and develop such a programme that may be disseminated and practised globally. Appropriate training administered regularly correctly and with appropriate procedures and practices and with constant monitoring and follow-up would not only enhance efficiency but will also prevent the loss of health life and profits
AuthorsVenkatramen Sheshashayee
Date published2002
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Heat release control in a gas engine by a dual flame ignition
AuthorsS Ono ; Y Hirayama
Date published2000
AbstractThe performance of a reciprocating internal combustion engine depends on combustion processes when engine specifications are fixed. To control combustion processes in an engine cylinder several distributed burning zones can be used. Fuel supply conditions are changed in a single- cylinder test engine to show the widely changing heat release processes. Numerical simulations of the cycle performance related to the combustion processes are carried out using a numerical simulator developed for the purpose. Experiments are described. The results of experiments and calculations are given and the conclusions show that NOx emissions can be reduced without sacrificing fuel economy and that a multi-zone model should be used for a precise estimation of NOx emissions in the cycle.
AuthorsS Ono ; Y Hirayama
Date published2000
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Heat transfer in a porous insulation medium in a subsea bundled pipeline
AuthorsG Zheng ; N Burke ; D Cai et al.
Date published2000
AbstractA dimensionless analysis of the heat transfer mechanism in a simple pipe-in-pipe bundle system is presented. The analysis considers a typical foam insulation material as a true porous medium and applies the Darcy-type assumption for flow within the insulation. A simple yet general formulation for effective conductivity of a porous insulation medium used in pipelines is derived. The heat transfer coefficients of a simple pipe-in-pipe bundle was determined experimentally and the results were used to determine coefficients in the formulation. The model is used to illustrate the effect on thermal performance of: application pressure temperature differential between the fluid in the pipe and ambient temperature insulation thickness and material permeability. A formula for critical application pressure of a porous insulation system is given.
AuthorsG Zheng ; N Burke ; D Cai et al.
Date published2000
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Heat transfer in a rib-roughened rotating twin-pass trapezoidal-sectioned passage with cooling application to gas turbine rotor blade
AuthorsShyy Woei Chang ; Tsun Lirng Yang ; Ker-Wei Yu et al.
Date published2005
AbstractAn experimental study of heat transfer in a radially rotating twin-pass trapezoidal-sectioned duct with two opposite walls roughened by 45 degrees staggered ribs was performed. Two channel orientations of 0 degrees and 45 degrees from the direction of rotation were tested. At each Reynolds number of 5000750010000 12500 and 15000 local Nusselt numbers along the centrelines of two rib-roughened surfaces with five different heating levels were acquired at rotating numbers of 00.10.30.5 0.7 and 1. A selection of experimental results illustrates the isolated and interactive impacts of convective inertial Coriolis and rotating buoyancy forces on local and spatially-averaged heat transfers.
AuthorsShyy Woei Chang ; Tsun Lirng Yang ; Ker-Wei Yu et al.
Date published2005
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Heave and pitch motions of SWATH ships
AuthorsYoung S Hong
Date published2006
AbstractAn analytical method for predicting the motions of SWATH (small-waterplane-area twin-hull) ships has been developed using the strip theory developed earlier by Lee. The method has been further improved for the computation of heave and pitch motions in head seas by adding the effect of surge on the pitch exciting moment and by correcting the viscous-damping terms developed by the author. The numerical results correlate well with experimental results for a moderate speed range. They show an improvement in predicting the effects of added-mass and damping coefficients when compared with strip theory. However the same improvement is not achieved in predicting the effects of exciting forces and motions. A more exact application of the slender-body theory may provide more accurate results.
AuthorsYoung S Hong
Date published2006
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Helical buckling of tubulars subjected to axial and torsional loading in inclined and horizontal wells
AuthorsJ C S Cunha ; S Miska ; F L L Carneiro et al.
Date published1995
AbstractBuckled tubulars can cause a variety of problems in oil and gas field operations including drillstring failure casing wear and casing and tubing failure. An analysis of the buckling behaviour of tubulars in inclined and horizontal wellbores is presented. The expressions for buckling initiation and helical buckling are reviewed and analysed. The effect of torque on the buckling process is considered. A post-buckling analysis is presented and the derivation for the critical force for the unloading situation is included. Three numerical examples for tubulars that are commonly used in the oil industry are provided.
AuthorsJ C S Cunha ; S Miska ; F L L Carneiro et al.
Date published1995
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High accuracy flow rate measurements: an entire multiphase solution at the well site
AuthorsBruno Pinguet ; Paul Guieze ; Dave MacWilliam et al.
Date published2007
AbstractThis paper focuses on the Multiphase Active Sampling Device Service (MASS) a fluid sampling and analysis service that can be provided with the Vx multiphase metering technology. MASS has the objective of collecting representative samples isolating and analyzing each fluid phase and providing data from the analysis to input to the Vx acquisition software data to obtain more accurate flow rates. The collection of phase representative samples also opens the opportunity for a full recombination PVT study to be performed using the improved recombination ratio at line conditions from the multiphase flow meter. This dedicated multiphase fluid sampling and analysis system combined with Vx technology provides flow rate better and fluid property than to a conventional test separator system.
AuthorsBruno Pinguet ; Paul Guieze ; Dave MacWilliam et al.
Date published2007
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High-resolution 3D imaging by a sparse array: array optimisation and image simulation
AuthorsStefania Repetto ; Maria Palmese ; Andrea Trucco
Date published2005
Abstract3D acoustic imaging is one of the main innovations in underwater applications in recent years. In underwater contexts a planar array of acoustic sensors is able to gain useful information about 3D geometrical features allowing the following: (1) the identification and location of objects and details of an underwater scene; (2) the accurate manipulation of mechanical parts by the use of robotic arms; and (3) the monitoring of movements among mechanical parts. The design of a high-resolution 3D acoustic imaging system based on a sparse planar array of sensors is presented. The aim is to generate useful acoustic 3D images in underwater context. To this end a planar array is mandatory as a linear aperture does not allow the discrimination of signals coming from a 3D space. One critical issue in the development of high-resolution 3D sonar systems is the hardware costs associated with the huge number of sensors required. An innovative 3D imaging system is proposed that is able to operate at different resolution levels.
AuthorsStefania Repetto ; Maria Palmese ; Andrea Trucco
Date published2005
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High Reynolds number flow tests of flexible cylinders with helical strakes
AuthorsDon W Allen ; Dean L Henning ; Li Lee
Date published2005
AbstractTow tests have been carried out on flexible circular cylinders with and without short helical strakes towed in a basin at critical and supercritical Reynolds numbers. Measurements were made of both the drag and acceleration (due to VIV (vortex-induced vibration)) of the cylinder. The test results for cylinders fitted with triple-start helical strakes are presented. Results for strakes with heights ranging from 0.05D to 0.10D are presented. The pitch was 5D per start and the strakes have three starts in every test. Results from bare (unsuppressed) cylinders are presented alongside the strake results for comparison purposes. The findings presented should be of interest to offshore engineers and scientists involved in VIV research analysis and suppression design.
AuthorsDon W Allen ; Dean L Henning ; Li Lee
Date published2005
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High-speed craft bow diving in following seas
AuthorsIan W Dand
Date published2006
AbstractConcern over safety issues associated with high-speed passenger craft prompted the UK Maritime and Coastguard Agency to fund a programme of research into the behaviour of such vessels in following and stern quartering seas. This study carried out by BMT explores a number of behavioural aspects in following seas but much of the work is on the phenomenon of bow diving. An overview of the whole research project is given. Then the focus turns to those aspects related to design with special reference to the freeboard at the bow to avoid bow diving. A comprehensive series of tests is presented using both captive and free-sailing models to explore the causes of the phenomenon leading to the development of a single computer model. This model was used to explore and extend the results obtained from the model tests and ultimately to provide some guidance for design.
AuthorsIan W Dand
Date published2006
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Higher order restoring forces for the design of multi-leg mooring arrangements
AuthorsIoannis K Chatjigeorgiou ; Spyridon A Mavrakos
Date published2003
AbstractMulti-leg mooring systems are used in a wide variety of offshore applications in order to restrain mainly the sway sway and yaw motions of a moored vessel that are not controlled by its hydrostatic restoring characteristics. A solution is presented that has been developed for the calculation of the first- and second-order restoring coefficients of a multi-leg mooring system. The method is based on a Taylor series expansion of the external loading. The unknown restoring coefficients are obtained by means of the horizontal holding force and its derivatives with respect to the surge sway sway and yaw motions of the moored vessel. It is shown that the second-order restoring coefficients are of insignificant importance as their magnitude are less than 1% in comparison with the corresponding first order coefficients. The most important contribution arises from the yaw motion which for extremely severe external loading might contribute slightly in the magnification of the displacement.
AuthorsIoannis K Chatjigeorgiou ; Spyridon A Mavrakos
Date published2003
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Highlighting pipelines offshore Norway: visualisation and quantitative analysis
AuthorsR E Loke ; J M H du Buf
Date published2001
AbstractSonar profiler data of the seabottom are 3D data sets that can cover huge survey areas with many gaps. A multi- resolution visualisation framework is presented which can be applied to very large sonar data sets to facilitate a fast seabottom analysis and-or a fast search for objects in the subbottom. Also presented is a new interpolation technique which has been optimised for application to the sonar data and a new triangulation technique which if applied in an octree can construct very efficient polygon meshes resulting in fast interactivity even at the highest level of detail. In the future it is hoped to apply the visualisation framework together with its embedded techniques to other data to allow a fast processing of huge data sets thereby focussing on a fast user interactivity.
AuthorsR E Loke ; J M H du Buf
Date published2001
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History and Origins of Cryogenics
AuthorsR Scurlock (ed)
Shelf Location212a
AbstractDunedin 1882. The text consists of a number of national histories together with separate chapters on the early centres of excellence and the pioneering cryogenic industries. The net result is a fairly comprehensive coverage of all of the developments in cryogenics since 1877. Chapters include: cryogenics and low temperature physics in the Netherlands, cryogenics in Poland, the story of Linde AG, development in France, history of cryogenics in BOC, industrial cryogenic engineering in the USA, low temperature physics in Cambridge, origins of cryogenics in Germany, low temperature physics and cryogenics at Oxford, cryogenics in the USA, cryogenics development in Japan, cryogenics in China. Final chapters look at hydrocarbon processing at low temperatures, the history of liquified natural gas (LNG), and future trends in cryogenics.
AuthorsPublisherR Scurlock (ed)
Oxford Scientific Publications ; Clarendon Press
Catalogue number621.59
Shelf LocationDate published212a
1992
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History and recent developments in semi-hard coatings used for protecting ships' ballast tanks
AuthorsU Schunke
PublisherRINA Conference Proceedings
AbstractAn overview is presented of some methods used to protect ballast tanks against a background of shipowners' growing awareness of the importance of preventative maintenance programs to protect their investment. No steel and/or metal surface will rust while there is a suitable coating system adhering firmly. In 90% of cases the most direct reason for coating failure on steel and the resulting corrosion is due to the fact that water could spread under the coating film. The anodes and coatings used by the maritime world to combat corrosion in ballast tanks is considered along with recent developments.
AuthorsDate publishedU Schunke
1994
PublisherRINA Conference Proceedings
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Host-parasite interaction of a muscle-infecting didymozoid in the Atlantic mackerel Scomber scombrus L.
AuthorsS Pascual ; E Abollo ; C Azevedo
Date published2006
AbstractFlesh quality is a concern to any industry that sells a fresh meat product. Parasites have been considered a factor critical in influencing conventional seafood quality and price. This study provides data on the host-parasite interactions of a muscle-infecting didymozoid in the eastern stock of Atlantic mackerel addressing the molecular characterisation of the parasite analysing prevalence data and investigating the ultra-structure of host-parasite interactions. Experimental methods are described. Results are presented and discussed. It is concluded that concurrent heavy infection makes the mackerel flesh unappealing to eat although the quality of the fish is not significantly affected and there is no public health danger.
AuthorsS Pascual ; E Abollo ; C Azevedo
Date published2006
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Human fatigue and performance in the maritime environment
AuthorsMichelle Grech ; Paul Elischer ; Sarah-Louise Donovan
Date published2003
AbstractPerformance has been defined as 'a result of a pattern of actions carried out to satisfy an objective according to some standard. The actions may include observable behaviour'. Crew performance can be affected either positively or negatively. If performance is lower than some measurable standard following an error it can be implied that human error has negatively affected crew performance. This could result in degraded performance if any of the basic capabilities required to perform an activity are reduced or are lacking which can result in an unsafe system state. The purpose of these studies is to investigate the antecedents of fatigue from three levels of analyses with particular emphasis on workload stress and seasickness and the way they vary within day across days and between-individuals. Some of the results that emerge from these studies are novel and have important implications for maritime operations. Analyses discussions and conclusions are presented.
AuthorsMichelle Grech ; Paul Elischer ; Sarah-Louise Donovan
Date published2003