hull forms
Practical evaluation of resistance of high speed catamaran hull forms Part I
... Although catamaran configuration has been around for a longtime, it is only in the recent past that such hull forms have seen unprecedented growth in the high-speed ferry industry. One of the design ...
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Geometric considerations for the design of production friendly high speed ship hull forms
... existing hull forms have been modelled and subsequently planked using an implementation of the planking algorithm described in the previous ...known hull forms representative of modern high- ...
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Smart design of hull forms through hybrid evolutionary algorithm and morphing approach
... existing hull form design process, there are several benefits of this HEAM ...proven hull forms designs as compared to improvement from only one ‘sister-ship’ hull designs, which enables the ...
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Practical evaluation of resistance of high speed catamaran hull forms Part I
... Catamarans account for 43% of the fleet by vessel numbers as given by the report of Drewry Shipping Consultants (1997). Slender hull forms and higher speed capabilities provoked the need of technological ...
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A Hybrid Method for Predicting Lift and Drag of Semi-planing/ Semi-displacement Hull Forms
... Tuck (1975) also studied the low-aspect-ratio flat-ship integral equation of Maruo (1967). Tuck attempted to overcome the difficulty of Maruo’s singularity by rewriting the equation in terms of the stream function. Tuck ...
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Design of Malaysian fishing vessel for minimum resistance
... variant hull forms produced must be practical and ...the hull is gradually modified and the maximum limit of range of modi- fication is considered reached when visual checks show odd shapes or ...
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Methods for assessing the seakeeping performance of high speed displacement monohulls and catamarans
... An experimental test programme was carried out in regular head and oblique waves as well as irregular open seas on two different hull forms of fast displacement catamarans.. The results [r] ...
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Damage stability of ships as a safety criterion for optimisation tools
... In the late 1980s, Hearn et al. (1988) developed a Frank close-fit (see Frank (1967)) velocity potential based strip theory for in-house seakeeping analysis within the design offices of British Shipbuilders. Since there ...
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Computational fluid dynamics-based hull form optimization using approximation method
... the hull forms opti- ...CFD-based hull form optimization loop has been developed by integrating an approximate method to optimize hull form for reducing the total resistance in calm ...
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Hull Shape Optimization for Wave Resistance Using Panel Method
... based hull design starts with a very basic approach of using a small num- ber of control parameters for attaining final design ...basic hull properties, such as center line buttock or the shape of the deck ...
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Translations of Two Japanese on Catamarans
... Theoretical calculations as well as experimental results on non-symmetrical hull forms of twin-hull ships have already been described in Report No.. The theoretically expected advantage [r] ...
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An Investigation Into The Drag Increase on Roughen Surface due to Marine Fouling Growth
... In this work, physical models are used for investigating the roughness effect for ship. After the evaluation resistance can be concluded that a variation of the conditions of hull ship effect on the total drag. ...
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Experimental analysis of an air cavity concept applied on a ship hull to improve the hull resistance
... the hull form, for example there is an air cavity underneath the ...the hull had been modified, two incline tests were conducted: one with a water filled cavity; and other with an air-purged ...
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Energy Saving in Ship Operation Case Study Ankit Pandey 1, Dr. Santosh Dalvi2
... Shipping is the world's only really reliable, global, cost-effective and energy-efficient mass transportation method for energy, materials, foods and products, maritime transport is central to sustainable development. In ...
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Energy Saving in Ship Operation Ankit Pandey, Dr. Santosh Dalvi
... High bunker costs and increased environmental regulations are forcing operators of all vessel types to search for ways to monitor fouling conditions and cost- effectively counteract its effect [24] (Woods Hole ...
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LNG spill and diffusion from transport and storage system
... the hull water level is below the top of the hull penetration, there will be an unstable interface of air on one side and water on the ...inner hull will escape by ...constant hull pressure. ...
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Energy Saving in Ship Operation Ankit Pandey, Dr. Santosh Dalvi
... Ship performance monitoring traditionally has been a complex subject, requiring knowledge of naval architecture, marine engineering, mathematics, statistics, and more recently, computer science. In the past, a major ...
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Integer polyhedra for program analysis
... integer hull, and inequality ineq with each point in V s lying on the boundary of ...1. Hull represents the inequalities in the integer ...to Hull, line 7. If there is, line 10, the procedure ...
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The Upper Monophonic Hull Number of a Graph
... Proof. Let mh(G) = p–1. Then it follows from Theorem 2.10, mh + (G) = p or p – 1. If mh + (G) = p, then by Theorem 2.12, mh(G) = p, which is a contradiction. Hence mh + (G) = p – 1. Conversely, let mh + (G) = p – 1. Then ...
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Sound absorption capability and mechanical properties of a composite rice hull and sawdust board
... Sawdust is a plentiful by-product of timber operations and lumber production. Reuse of sawdust has to date been satisfactory primarily due to the very high water absorp- tion rate of the material. Sawdust is mainly used ...
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