Download or read book Validation of WAVELOAD a 3 D Frequency domain Computer Program for Ship Motions and Hull Pressures written by and published by . This book was released on 1999 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prediction of ship motions, sea loads, and hydrodynamic pressure distributions over a ship hull is an essential component of ship structural design. The immediate goal is to provide accurate hull pressure input for finite element structural analysis. To this end, a frequency-domain computer program (WAVELOAD), based on the three-dimensional panel-method, has been developed to predict ship motions, wave loads, and hydrodynamic pressures. The purpose of this paper is to describe the theoretical background of WAVELOAD and its experimental validation using the data from model tests with a destroyer model in head seas. Total factor error (TFE) was used as an index of correlation of predicted & measured transfer functions. TFE analysis was applied to the predictions by other computer programs (PRECAL & SHIPMO7) as well as to those by WAVELOAD. The results showed whether WAVELOAD is a reliable software package for sea-load predictions.
Download or read book Validation of WAVELOAD Version 1 0 for the Case of a Destroyer in Regular Head Waves written by and published by . This book was released on 1998 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prediction of ship motions, sea loads, & hydrodynamic pressure distribution over a ship hull is an essential component of ship structural design. An important use of such data is to provide accurate hull pressure input for finite-element structural analysis. To this end, the computer program WAVELOAD version 1.0 has been developed to predict ship motions, wave loads, and hydrodynamic pressure in the frequency domain based on the three-dimensional panel method. This report describes the experimental tests with a destroyer model in head seas. Total factor error (TFE) was used as an index of correlation of predicted & measured transfer functions. By examining TFE values, one can assess not only the degree of correlation quantitatively, but also the reliability of the experimental data. The TFE analysis was applied to the predictions by two other computer programs, PRECAL and SHIPMO7, as well as to those by WAVELOAD. The results show whether WAVELOAD is a reliable software package for sea-load predictions.
Download or read book Twenty Third Symposium on Naval Hydrodynamics written by National Research Council and published by National Academies Press. This book was released on 2002-01-01 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Vive la Revolution!" was the theme of the Twenty-Third Symposium on Naval Hydrodynamics held in Val de Reuil, France, from September 17-22, 2000 as more than 140 experts in ship design, construction, and operation came together to exchange naval research developments. The forum encouraged both formal and informal discussion of presented papers, and the occasion provides an opportunity for direct communication between international peers. This book includes sixty-three papers presented at the symposium which was organized jointly by the Office of Naval Research, the National Research Council (Naval Studies Board), and the Bassin d'Essais des Carènes. This book includes the ten topical areas discussed at the symposium: wave-induced motions and loads, hydrodynamics in ship design, propulsor hydrodynamics and hydroacoustics, CFD validation, viscous ship hydrodynamics, cavitation and bubbly flow, wave hydrodynamics, wake dynamics, shallow water hydrodynamics, and fluid dynamics in the naval context.
Download or read book Applying the TFE Analysis to Validate the Software WAVELOAD written by and published by . This book was released on 1999 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: A frequency-domain computer program (WAVELOAD), based on the three-dimensional panel-method, has been developed to predict ship motions, wave loads, and hydrodynamic pressures. This paper describes & presents results from a numerical validation carried out using the data from model tests of a destroyer & an ore carrier. Total factor error (TFE) was used as an index of correlation of predicted & measured transfer functions. The TFE analysis was also applied to the prediction by other computer programs, PRECAL and SHIPMO7. The results show whether WAVELOAD is a reliable software package for sea-load predictions.
Download or read book Development of a Computer Program for Three Dimensional Frequency Domain Analysis of Zero Speed First Order Wave Body Interaction written by Amitava Guha and published by . This book was released on 2013 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluation of motion characteristics of ships and offshore structures at the early stage of design as well as during operation at the site is very important. Strip theory based programs and 3D panel method based programs are the most popular tools used in industry for vessel motion analysis. These programs use different variations of the Green's function or Rankine sources to formulate the boundary element problem which solves the water wave radiation and diffraction problem in the frequency domain or the time domain. This study presents the development of a 3D frequency domain Green's function method in infinite water depth for predicting hydrodynamic coefficients, wave induced forces and motions. The complete theory and its numerical implementation are discussed in detail. An in house application has been developed to verify the numerical implementation and facilitate further development of the program towards higher order methods, inclusion of forward speed effects, finite depth Green function, hydro elasticity, etc. The results were successfully compared and validated with analytical results where available and the industry standard computer program WAMIT v7.04 for simple structures such as floating hemisphere, cylinder and box barge as well as complex structures such as ship, spar and a tension leg platform. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/148193
Download or read book Proceedings of the 15th International Ship and Offshore Structures Congress written by A.E Mansour and published by Elsevier. This book was released on 2003-06-26 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: KEY FEATURES: - Provides researchers in Ocean engineering with a thorough review of the latest research in the field - Lengthy reports by leading experts - A valuable resource for all interested in ocean engineering DESCRIPTION:The International Ship and Offshore Congress (ISSC) is a forum for the exchange of information by experts undertaking and applying marine structural research. These three volumes contain the eight technical committee reports, six Specialist Committee and 2 Special Task Committee reports which were presented for the 15th International Ship and Offshore Structures Congress (ISSC 2004) in San Diego USA, between 11th and 15th August 2003. Volume III will be published in 2004 and is to contain the discussion of the reports, the chairmen's reply, the text of the invited Lecture and the congress report of ISSC 2003.
Download or read book Ship Structure Symposium 84 written by and published by . This book was released on 1984 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Twenty Second Symposium on Naval Hydrodynamics written by National Research Council and published by National Academies Press. This book was released on 2000-03-02 with total page 1039 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Twenty-Second Symposium on Naval Hydrodynamics was held in Washington, D.C., from August 9-14, 1998. It coincided with the 100th anniversary of the David Taylor Model Basin. This international symposium was organized jointly by the Office of Naval Research (Mechanics and Energy Conversion S&T Division), the National Research Council (Naval Studies Board), and the Naval Surface Warfare Center, Carderock Division (David Taylor Model Basin). This biennial symposium promotes the technical exchange of naval research developments of common interest to all the countries of the world. The forum encourages both formal and informal discussion of the presented papers, and the occasion provides an opportunity for direct communication between international peers.
Download or read book Improved Time domain Code for Prediction of Ship Motion and Sea Loads in Head and Following Seas written by and published by . This book was released on 1995 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes development work carried out to extend the previously developed prediction methods and associated computer code for the solution of the linear time domain hydrodynamic ship motion problem. The previous methods and code were restricted to head sea conditions, and the work reported extends these to include following sea conditions. Presents the theoretical methods used to determine the impulse response functions associated with the incident wave pressures and velocities and the diffracted and Froude- Krylov wave forces under following sea conditions. Also reviews computer code improvements incorporated in the latest work, including improvement in the static equilibrium calculation routine, provision of an improved hull panelling scheme and transom panelling procedure, and reduction in storage requirements. Presents validation studies to examine the performance of the improved hull motion prediction procedures. Both measured and predicted hull motion data for three widely differing hull forms are compared to numerical prediction obtained from the present computational modelling (both head sea and following sea data included).
Download or read book ShipMo3D Version 3 0 User Manual for Creating Ship Models written by Kevin McTaggart and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ShipMo3D is an object-oriented library with associated user applications for predicting ship motions in calm water and in waves. This report serves as a user manual for creating ship models using ShipMo3D Version 3.0. A companion report serves as a user manual for predicting ship motions in the time and frequency domains. Version 3 of ShipMo3D introduces modelling of sloshing tanks and U-tube tanks. Several ShipMo3D applications are used for creating a ship. SM3DPanelHull creates a panelled representation of the wet and dry portions of the ship hull. SM3DRadDif computes radiation and diffraction forces acting on the wet hull using a boundary element method. SM3DPanelSloshTank creates a panelled representation of a sloshing tank, such as a tank containing liquid cargo or a roll stabilization tank. SM3DRadSloshTank computes sloshing forces arising from motions in the frequency domain. SM3DBuildShip creates a model of the ship that can be used for ship motion predictions in either the frequency domain or time domain.
Download or read book Sea Loads on Ships and Offshore Structures written by O. Faltinsen and published by Cambridge University Press. This book was released on 1993-09-23 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: After introducing the theory of the structural loading on ships and offshore structures based on the motions of wind, waves and currents, this text demonstrates its applications to conventional and non-conventional sea vessels, including extensive exercises and examples.
Download or read book ShipMo3D Version 3 0 User Manual for Computing Ship Motions in the Time and Frequency Domains written by Kevin McTaggart and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydroelasticity of Ships written by Richard Evelyn Donohue Bishop and published by Cambridge University Press. This book was released on 1979-12-27 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: Good,No Highlights,No Markup,all pages are intact, Slight Shelfwear,may have the corners slightly dented, may have slight color changes/slightly damaged spine.
Download or read book Strength of Ships and Ocean Structures written by Alaa Mansour and published by Society of Naval Architects & Marine Engineers. This book was released on 2008 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume addresses several topics of ship strength in greater depth than in the previous edition of PNA, bringing much of the material up to date and introducing some new subjects. There is extensive coverage of the latest developments in dynamic sea load predictions, including nonlinear load effects, slamming and impact plus new sections on the mechanics of collisions and grounding.
Download or read book Twenty Fourth Symposium on Naval Hydrodynamics written by National Research Council and published by National Academies Press. This book was released on 2003-11-15 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is part of a series of reports that summarize this regular event. The report discusses research developments in ship design, construction, and operation in a forum that encouraged both formal and informal discussion of presented papers.
Download or read book Design of Ship Hull Structures written by Yasuhisa Okumoto and published by Springer Science & Business Media. This book was released on 2009-03-25 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the four authors show us the condensed experience how to design ship hull structures from a practical viewpoint. In three parts, the book presents the fundamentals, the theory and the application of structural design of hulls. The topics are treated comprehensively with an emphasis on how to achieve reliable and efficient ship structures. The authors have in particular introduced their experiences with the rapid increase of ship sizes as well as the introduction of ship types with a high degree of specialization. The associated early failures of these "new" structures have been analyzed to provide the readers with illustrations why structural design needs to be carried out on several levels in order to ensure that correct loading is applied and that local structural behaviour in properly understood.
Download or read book Stability and Seakeeping of Marine Vessels written by Ermina Begovic and published by Mdpi AG. This book was released on 2021-08-30 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the papers accepted into the Special Issue "Stability and Seakeeping of Marine Vessels" and includes nine contributions to this Special Issue published in 2020. The overall aim of the collection is to improve knowledge about the most relevant and recent topics in ship stability and seakeeping. Specifically, the articles cover a wide range of topics and reflect the recent scientific efforts in the 2nd generation intact stability criteria evaluation and modelling of the ship dynamics assessment in intact or damaged conditions. These topics were investigated mainly through direct assessments performed both via numerical methods and tools, and experimental approaches. The book is addressed to individuals from universities, research organizations, industry, government agencies and certifying authorities, as well as designers, operators and owners who contribute to improved knowledge about "stability and seakeeping".
