Search our collections

The book presents the theory of resistance and propulsion of vessels and gives methods, rules and formulae which may be applied in practice to such matters. The contents are based largely on model experiments which were initiated by William Froude. Contents are arranged within four 'books': Book 1: stream lines, trochoidal water waves, similitude, wetted surface: Book 2: Resistance (frictional, eddy, wave, air), squat and trim, shallow water effects and rough water effects: Book 3: Propulsion: propeller, cavitiation, wake and obliquity of water, paddle, jet: Book 4: Trails and their analysis: speed and power trials: Book 5: The powering of ships: Rankine's Augmented surface method, Kirk's method, Admiralty coefficient, extended law of comparison, standard series method.

This study aims to clarify risks of kite assisted propulsion by developing a realistic fuel saving model and carrying out a formal risk assessment for merchant vessels. A resistance and propulsion model for uniform weather conditions is developed and a formal safety assessment considering navigation structural strength and operationsal risks is carried out. Current international safety regulations and classification rules are applied and issues in the global implementation of kite assisted propulsion are identified. This study aims to provide a balanced view of the financial and technical risks associated with kite assisted propulsion at a time when the industry tries to reduce environmental damage and emissions from shipping.

Knowledge about slamming and its effects on fast monohull vessels is limited by the lack of historical reference data (if that is the same standards applied for conventional ships are not adopted for these vessels). The development of an integrated numerical calculation procedure for the evaluation of slamming hydrodynamic loads on fast monohull vessels is described together with the subsequent transient dynamic response of the hull girder in terms of flexural longitudinal bending moment amidship. The procedure has been applied to the study of the MDV-3000 fast ferry designed and built by Fincantieri. A validation of the procedure is also presented through a comparison with design values from rules and experimental results from sea trials. It is concluded that the procedure could be applied at the design stage of new fast ships to evaluate possible wholeness risks due to slamming events.

Simulation of collapse behaviour is an essential issue in assessing the safety of marine structures. An accurate estimate of the maximum load-carrying capacity also called ultimate strength is required to determine the maximum load that a structure can support. A methodology is presented which takes into account model uncertainties related to the load-end shortening curve of stiffened panels. This method is a part of a research activity which aims to propose a reliability-based model to assess hull girder ultimate strength using a progressive collapse algorithm. The numerical results presented concern the load-shortening model chosen for this research which is based on Bureau Veritas rules. Model uncertainty is quantified as a parameter considered as a random variable. Four statistical moments (mean standard deviation skewness and kurtosis) of this parameter are calculated and analysed using a database of stiffened panels test results published in recent years. In order to increase the number of 'actual' values for the statistical assessment the database is completed with non-linear finite element analysis results. Some recommendations for the implementation of the proposed method in ultimate strength reliability-based analysis are presented.

Cost estimating for offshore oil and gas developments comprising floating structures is commonly regarded as a deterministic process that is based on the use of norms and rules of thumb on clearly defined quantities. In most cases this requires immense effort a huge amount of historical data from similar projects and detailed design of the proposed development which is usually not available in the conceptual and appraisal stages of the project. It would be valuable to have a simulation model based on stochastic functions that map a set of input parameters to a set of outputs by translating the predetermined scope to quantities and then predictive costs. This could then be used in concept selection studies sensitivity analysis and optimisation in the front-end and development planning stages of an offshore project.

The paper describes the development of a decision support system (H-LIFT)designed to provide computer-based support to engineers involved with heavy lifts using sheerleg crane vessels. The knowledge-based approach is adopted in the H-LIFT system where the knowledge base incorporates domain knowledge on heavy lift rules and design criteria component databases and research results on the strength of lift point components and sling load distribution. H-LIFT is developed using object-oriented technology and runs interactively within the Windows environment on a personal workstation with three-dimensional graphical displays. The application of the H-LIFT system is highlighted through an illustrative example. This knowledge-based decision support system is found to be an able assistant in heavy lift evaluation and design.

Fault tree analysis is a deductive procedure for determining the effects of combinations of component failure and human error on complex systems. A fault tree analysis expert system FTAES is described in detail. FTAES was developed for reliability analysis and real-time detection and diagnosis applications in the offshore industry. The basic elements of the system are object-orientated structures production rules representing expert's heuristics algorithms and database structures. The system was designed with a blackboard architecture that can integrate knowledge from several sources and support both qualitative and quantitative evaluations of the fault tree. A fuzzy set approach analyses problems that lack failure data or that have a large amount of fuzziness or imprecision.

Environmental friendliness is an important element of responsible shipping and therefore increased importance is given to design and operational measures which support pollution prevention. MARPOL are internationally recognised regulations. However MARPOL regulations were not specifically designed to cover naval ships and therefore a certain degree of adaptation is necessary to align its requirements with Navy practices and procedures. In order to complement its RINAMIL (Rules for Classification of Naval Ships) RINA SPA carried out such adaptations which are now being implemented in the Italian Navy's fleet. The applicability of MARPOL to naval ships is discussed. The customisation carried out by RINA SPA is outlined and a few examples of applications based on experience with the Italian Navy's fleet are presented. Conclusions are drawn.

Based on the warship practice and fire theory four static and dynamic guidelines describing fire hazard of warship compartments are set up that is burning hazard guideline; compartment mutuality degree guideline; equipment operation state guideline and shipman state guideline. With these four guidelines the fire hazard of warship compartments can be calculated. In this paper the index values of the four guidelines for 9 categories of compartments in rules are presented. Then the relationship model of the compartment fire hazard guidelines is derived from the ANN model. With this method to calculate the class of the compartment division fire protection it reduces the required experience of the design engineers in warship fire protection design. With the application of this method some large compartment fire protection has beend done and the result is identical to that of other methods. This method can be a reference in warship fire production design.

Introduction: 1. The Wealth, Safety and Strength of the Kingdom 2. Protectionism Abandoned 3. Free Trade - but hardly Laissez-faire 4. Britannia Rules the Waves 5. The Great War and It's Aftermath 6. Economic Nationalism and Return to Protectionism 7. The Fourth Service at War Again 8. Years of Plenty - then lean years 9. British External Shipping Policy and Foreign Competition 10. Resurgence of British Shipping and Reorganisation of British Shipbuilding 11. British Shipbuilding - the Final Solution 12. The Rise and Decline of British Shipping Epilogue - The Falklands and after

Volume 1 and 2 have been DIY bound into one volume. Volume 1 collects together all legislation, classification society rules and codes and guidelines which apply to offshore oil and gas activities or associated support services on the UK sector of the North West European Continental Shelf. It is divided into 13 main sections: licensing and licensing activities; pipelines; vessels; facilities; underwater working; medical, health and welfare provisions; operations; emergencies; pollution and environment; helicopters; employment; and fiscal matters.

Proper stowage and securing of items of cargo is very important for the safety of the crew, the carrying vessel, and the items of cargo themselves. The guide takes the reader through the basic rules to be remembered on every occasion during loading and securing of cargo, and describes where regulations, recommendations and general guidance can be found. It also describes recommended methods to be used for particular items and types of cargo, and gives guidance upon the points to be remembered during passage-planning and the voyage itself. The object of this guide is to increase the seafarer's knowledge of the forces acting on items of cargo, and of the requirements for the stowage and securing or cargo, in order to aid loss prevention.

Discussion of a project to develop an intelligent diesel engine monitoring system which will be able to assess engine health diagnose the causes of faults and indicate the remaining life before limits are exceeded. The project primarily addresses thermodynamic aspects. Intelligent diesel engine monitoring systems are mainly based on rules and heuristic knowledge. In addition to heuristics knowledge based on process models is used in this project. Two types of process models are applied - integral engine models and component models. The advantage of using process models is elucidated in particular the use of component models. The structure tuning and diagnostic capabilities of the component models are examined along with the difference between theoretical models and those applicable to diesel engines.

Apart from operating the naval fleet most naval organisations are accountable for regulating safety. Internal regulation may be questioned by external stakeholders. The confidence of stakeholders can be improved by application of internationally accepted rules and the use of class societies in the certification process. As the Netherlands Ministry of Defence has only used class societies during plan approval and construction (and not throughout the lifecycle) a SWOT analysis was carried out. A SWOT analysis is used to generate an extensive view on the benefits and risks of class involvement. Here the approach and results of the enquiry and analysis undertaken in Autumn 2007 are presented. This was carried out by staff working in various departments within the RNIN (Royal Netherlands Navy) and DMO (Netherlands Defence Materiel Organisation).

Sometimes offshore structures such as oil production platforms have to be constructed in ice-covered waters within a seismic zone. Current design rules and guidelines do not give definite directions about such structures subject to combined loads of earthquake and sea ice but only indicate consideration of literature such as API (1993) API(1995) SCI(1992) CHTC(1996) etc. However engineers involved in designing such structures might by rough rule of thumb choose a solution from the following three options: 1. Design seismic load plus design ice load; 2. Lager load between design seismic load and design ice load; 3. Design seismic load plus ice load of usual or serviceable condition. Most designers chose the second solution. However exactly which is the right answer was not known. Therefore Japan Ocean Industries Association organised a research project. The report from the project was JOIA (2000).

This paper is a summary of an investigation into the structural response of a marine gearbox when subjected to an oil mist explosion using the DYNA3D structural modeling tool. The computer model of the complex gearbox structure was simplified to allow scoping studies aimed at evaluating whether the structure and withstand the loading pressure. The joint strength in the model were calculated using simple bolt rules converted to critical failure stresses. The simulations demonstrated that a relatively simple approach gives good guidance to the likely structural response. They also give and insight into 'what if' studies whereby trade-offs in the structure can be explored to improve the survivability of the gearbox and hence increase the safety factor. Areas for further development are described.

This paper focuses on some of the differences between onshore and offshore wind energy technology the new risk environment in which they operate and how project certification can provide a useful tool for boosting stakeholder confidence during development while insuring cross-disciplinary integrity for the project as a whole. The European offshore wind energy market is outlined. Focusing on the technology itself some of the driving technical issues for offshore wind energy today and for the foreseeable future are discussed. An overview of recent developments in the large wind turbines used in offshore projects themselves is presented leading to a discussion on some of the key component developments facilitating this. An introduction to energy production is given that focuses on offshore wind farms and this is tied in with a discussion on various foundation concepts for offshore wind turbine support structures. Encompassing it all the role of project certification is discussed in its key phases. This overview is provided with reference to practical industry experience and the various existing DNV rules currently in publication

A trimaran hull has been developed for a general-purpose frigate. The results of a feasibility study are presented. Particular attention has been paid to the structural design of the hull and superstructures. Starting from the results of a previous study more concerned with the hydrodynamic design of the ship three configurations of the hulls were chosen for further analysis and the long-term loads calculated in several sea zones based on the results of a 3D sea keeping panel method. A rule-based design of the hull was carried out using RINA HSC rules; then a 3D FEM model of the whole ship was built to directly assess the hull structure response and adequacy to bending pitching and prying moments by using different techniques.

Risers and sections of pipeline in free-span can be subjected to cyclic loading from flow-induced vibrations and other fluctuating forces leading to fatigue loading of the structure. Single-sided welds are of particular interest however current design codes take a pessimistic view of their fatigue performance. Improvements in the quality of the finished weld produced by modern pipeline welding technology and indeed advances made in knowledge about fatigue of such welds mean that revision of the design guidance is now warranted. This paper reviews the fundamental basis of the existing S-N curves used for North Sea applications and considers their applicability in the light of research on fatigue of girth welds. Based on the review proposals are made for revised fatigue design rules for girth welds in pipelines.

Offshore constructions use plates that are either quenched and tempered or obtained as a result of a thermo- mechanically controlled rolling process with the end of rolling temperature below that of austenite recrystallisation. At the same time classification societies have rules about heat treatment after welding. Investigations are performed to explain how it is possible to predict the HVmax of welded joints in offshore constructions and how it is affected by the heat treatment of the joints. Results are presented of measurements of HVmax hardness of butt welded joints for thermally improved 18G2A and 18G2AV steel plates before and after heat treatment 580 oC per hour per 25 mm of joint thickness with cooling in air.