Download or read book A Method to Predict Long term Distributions of Waves and Wave inducted Motions and Loads on Ships and Other Floating Structures written by Nils Nordenström and published by . This book was released on 1973 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A METHOD TO PREDICT LONG TERM DISTRIBUTIONS OF WAVES AND WAVE INDUCED MOTIONS AND LOADS ON SHIPS AND OTHER FLOATING STRUCTURES written by W. Nordenström and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Method to Predict Long Term Distributions of Waves and Wave Induced Motions and Loads on Ships and Other Floating Structures written by and published by . This book was released on 1973 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Method to Predict Long term Distributions of Waves and Wave induced Motions and Loads on Ships and Other Floating Structures written by Nils Nordenström and published by . This book was released on 1973 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Norwegian Maritime Research written by and published by . This book was released on 1980 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear Analysis of Waves Induces Motions and Loads in Large Amplitude Waves written by Giuseppe Mortola and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An ocean going vessel, sailing in severe seas, experiences motions and loads that are largely a ected by nonlinear phenomena. These effects deviate the responses from the linear prediction, modifying their magnitudes, symmetry and frequency characteristics. The change of the actual wetted geometry due to motions and large ambient waves elevation and the occurrence of impulsive phenomena, such as bottom impact, are some of the main sources of nonlinearities. Current state-of-art in seakeeping, applied to ship design, is based on the assumption of small amplitude motions and linearity between the excitation and the response. These techniques have been proved, during the years, to be reliable for small and moderate sea states, but they are not effective in large amplitude waves. The understanding and prediction of the behaviour of the vessel in rough seas is of crucial importance for its design, and therefore there is a need for better methods and practices. Application of nonlinear seakeeping methods in a every-day design situatons is limited. The complexity and the computational cost of some methodologies, together with the absence of standardised procedures, are the main causes for the reduced use of such a methodologies. The work presented in this thesis aims to develop a practical nonlinear seakeeping approach that can be used in a design content to model wave induced motions and loads in large amplitude waves. The wave-body interaction problem is solved using a time domain nonlinear two dimensional approach, that considers the actual wetted hull portion and the relative velocity between the structure and the waves. The vessel is modelled as a flexible body to allow structural dynamics. The proposed formulation takes into account impulsive phenomena due to water impact, on both the bottom and the flare of the hull, using a combination of analytical and empirical techniques. The proposed methodology is applied to the S-175 and the Wils II 13,000 TEU container ships. The validation of the proposed method, conducted in both small and large amplitude regular waves, shows the capability of the technique to correctly predict the behaviour of the vessel also when linear methodologies fail. The analysis demonstrates the importance and the reliability of hydroelastic methods for the prediction of wave induced loads, especially when whipping is relevant. A procedure, which applies the proposed methodology for the evaluation of maximum expected values of wave induced motions and loads is presented. Long term analyses are conducted, using both linear and nonlinear method, to study the effect of nonlinearities. The comparison between linear and nonlinear approaches shows an increase of maximum load responses when nonlinear hydroelasticity is applied. This study highlights also the dependency of the results on the selection of the return period and operational velocity profile of the vessel.
Download or read book Statistical Distribution Patterns of Ocean Waves and of Wave Induced Ship Stresses and Motions written by Norman Hans Jasper and published by . This book was released on 1956 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods for Predicting Long Term Distributions of Wave Loads and Probability of Failure for Ships Part 1 Environmental Conditions and Short Term Response written by Nils Nordenstrom and published by . This book was released on 1971 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods for Predicting Long Term Distributions of Wave Loads and Probabililty of Failure for Ships written by Nils Nordenström and published by . This book was released on 1972 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Methods for Seakeeping Problems written by Bettar Ould el Moctar and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes currently applied and newly developed advanced numerical methods for wave-induced ship motions and loads. Besides well-established computational methods based on strip theory, panel methods and finite volume methods for unsteady Reynolds-averaged Navier-Stokes equations (URANS), recent advances like a fully nonlinear Rankine panel method, URANS calculations including elastic hull deformations, and an improved method to predict added resistance in waves are explained in detail. Furthermore, statistical methods to assess extreme motions and loads are described both for linear and nonlinear responses in a stationary seaway as well as during long-term ship operations. Results of motions and loads, computed using the various methods, are compared with each other and with results of model experiments. Introductory chapters on fluid dynamics, motions of rigid and elastic ship hulls, numerical methods to compute fluid flows associated with wind waves, and the development and simulation of seaways complement the volume. The book will be of interest to post-graduate students, PhD candidates, as well as engineers in the field of naval architecture, ocean, and marine engineering.
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 Petroleum Abstracts written by and published by . This book was released on 1979 with total page 1268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Critical Survey of Long term Distribution Formulas of Ocean Wave Induced Load Effects of Ship Structures written by Thommy Svensson and published by . This book was released on 1990 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Improved Strip Theory Program for Ship Motions and Sea Loads in Waves written by and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes enhancements to the strip theory program SHIPMO, with the goal of producing a robust code for predicting both ship motions and sea loads in waves. A new boundary element method was introduced which eliminates irregular frequencies of sectional hydrodynamic coefficients. Problems with predictions at low encounter frequencies are circumvented with a new extrapolation scheme. These improvements remove two sources of potentially large errors for predicted motions and sea loads. A new added resistance capability uses two different near-field methods for short and long wavelength regimes. Motion and sea load predictions include appendage and viscous forces for the lateral plane. Validation results for a warship are presented showing degree of agreement of predicted motions and sea loads with experiments.
Download or read book Advanced Methods for Ship Motion and Wave Load Prediction written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theory of Seakeeping written by B. V. Korvin-Kroukovsky and published by . This book was released on 1961 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oceanic Abstracts with Indexes written by and published by . This book was released on 1979 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
