2 edition of Recommendations for Ship Hull Surface Representation found in the catalog.
Recommendations for Ship Hull Surface Representation
|Statement||by Richard Franke|
|Contributions||Naval Postgraduate School (U.S.)|
|The Physical Object|
|Pagination|| p. ;|
|Number of Pages||18|
ABSTRACT This study focuses on the sea-going ship hull representation based on a single NURBS (Non-uniform Rational B-Spline) surface. Using the existing hull form data, half of typical ship hull is represented with a single NURBS surface for almost all the ship hull is by: 4. NAVAL sHIPS ENGINEERING CENT ER WASfifNGTON, D. C. Damage Control Books for Surface Ships, Revision of MIL-STDB(SHIPS) This standard bas been approved by tbe Naval Ship Engineering Center and is mandatory for use by activities under the cognizance of tbe Naval Ship Systems Command, effective on date of issue. ii 2.
Exploring the H-rep Ship Hull Modelling Concept Herbert J. Koelman, SARC, Bussum/The Netherlands, [email protected] Abstract A novel ship hull modelling method, called hybrid representation (H-rep) was proposed some years ago. The aim of the H-rep method is to make ship hull design more intuitive, and therefore faster, more accurate and more. Marine Corps Reference Publication (MCRP) B, Amphibious Ships and Landing Craft Data Book, is for use in planning where generalized capabilities and measurements are Size: 1MB.
A hull is the watertight body of a ship or boat. The hull may open at the top (such as a dinghy), or it may be fully or partially covered with a the deck may be a deckhouse and other superstructures, such as a funnel, derrick, or line where the hull meets the water surface is called the waterline. How much paint do I need? Applying the right thickness of the paint is very important. For instance, to prevent osmosis the coating system acts as barrier against the penetration of water vapour. If not thick enough, chances on osmosis are higher. Applying the right thickness is .
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Recommendations for Ship Hull Surface Representation by Richard H. Franke; 1 edition; First published in ; Subjects: Mathematical models, Algebraic Surfaces, Hulls (Naval architecture), Data processing, Design and construction.
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Publication date TZ. inanypointonthesurfacerequires evaluation ofthe appropriate loftingspline,and a bodyplanat a new station would be defined byits intersectionwith all loftingsplines.
ship-hull geometry for design purposes [1, 2]. The popularity of B-spline for free-form surface design lies in their useful characteristics, such as local support, the convex hull, and variation-diminishing properties . Theoretical background of B-spline curves and surfaces can be found in Farin .
A discussion of their suitabilityFile Size: 1MB. Automatic surface modelling of a ship hull. The hull surface modeling module includes various techniques for ship hull surface representation and modification.
The book thoroughly covers. Shipping Law and Conventions STCW – Standards of Training, Certification, and Watch-keeping The STCW Convention deals with standards of competence required by seafarers to join merchant vessels. It includes new training and certification requirements and methodologies, requirements of hours of work and rest, medical fitness standards for seafarers, and prevention of drug and alcohol abuse.
Grid of lines on hull surface Notwithstanding the fact that NURBS-based representation of a ship surface meets the requirements of analyticity and smoothness, the absence of possibility of controlling the shape of the surface by means of direct modification of frames, waterlines and buttocks may become a major problem for a novice user.
Ship structural details are subject to various loads and combinations of loads: axial, bending, shear, cyclic, and dynamic. They connect structure that is part of the basic hull girder, structure that is designed for overload, and structure of secondary importance.
Ship structural details are important because. Introduction. The hull is one part of the ship that requires extra concern during design and construction. In the history of naval architecture, hull designs has evolved over a period of time, from cylindrical wooden shanks to steel columns.
Engineers have been continuously innovating hull designs to provide greater structural strength. As hull is continuously in contact with water, it is. The associated ship surface is modeled to check the effect of two forms of section lines.
The continuity of functions for frames and section lines can guarantee the fairing of the ship surface. and recommendations. (1) Most importantly, a ship hull must be repre-sented by a surface. During the detail design phase, designers may require the exact location of any point on the surface.
Representation by lines is ambiguous in this respect. Further, the use of lines i -l -ft l i I a l I I II I I I I : Richard Franke. Autonomous Underwater Vehicle with a focus on ship hull inspection missions for Anti-Terrorism and Force Protection. Our hull-relative navigation and control are primarily based on a Doppler Velocity Log that the vehicle keeps pointed normal to the hull by means of a tilt actuator.
A Dual Frequency. Illustrated Glossary of Ship and Boat Terms A strake of planking that is discontinued near the bow or stern because of decreasing hull surface area.
A central stealer. Dunnage. Brushwood, scrapwood, or other loose material laid in the hold to protect the cargo from water damage or prevent it from shifting, or to protect the ceiling from Author: J.
Richard Steffy. Recommendations for ship hull surface representation By Richard Franke Get PDF (1 MB)Author: Richard Franke. hull form and geometry Curves of Form () KMT: (A measure of roll stability) This is the distance in feet from the keel to the transverse metacenter. Typically, Naval Architects do not bother putting the subscript T for any property in the transverse direction because it is assumed that when no subscript is present the transverse.
Abstract. In this work a methodology is presented for the computation of the intersection of parametric surfaces, namely Non Uniform Rational B-Splines (NURBS), with special attention to some specific requirements for applications to ship hull by: 6.
Hybrid representation of the shape of ship hulls Entwicklung günstiger Schiffsformen ist die wichtigste Aufgabe der Schiffs-bauwissenschaft‘ . Development of the best form of a ship hull was a time-consuming and labour-intensive task in the past.
Manual drawing of lines plan. Ship-hull geometry representation with B-spline surface patches L Bardis and M Vafiadou A program for the representation of ship-hull geometry by means of B-spline curves and surfaces has been developed.
Lines on the hull surface running along the length of the ship and sections with transverse planes are interpolated by by: 9. Boat Design and Boatbuilding Books. Textbook covering curve defintion, representation, and generation ship curve design, eementary mathematical properties of surfaces, the PDE Method for Surface Generation, Blend Design, Free-Form Surface Design, Numerical Solutions of Elliptic PDEs, Surface Generation, Analysis of Surface Fairness, and.
information), as shown in Figure The traditional drawings of a ship’s lines (Figure ) is a form of a wireframe model of a ship hull. It is created by intersecting the hull surface with three sets of orthogonal planes. Usually the hull surface is taken as the molded hull surface which is the inner side of the hull File Size: KB.
To illustrate the integrated hydrodynamic optimization tools, a cargo ship is optimized for reduced drag. The optimal hull forms obtained are then validated computationally and experimentally. Validation results show that the prese- nt tools can be used efficiently and effectively in the simulation based design of the hull forms for reduced by: Practical Ship Hydrodynamics.
Book • Authors: Volker Bertram. Browse book content. Any propulsion system interacts with the ship hull. The flow field is changed by the (usually upstream located) hull.
as free surface steady flows for ships in reality are always strongly three dimensional, the two-dimensional problem is an.