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Information × Registration Number 0210U000355, 0107U000714 , R & D reports Title Investigation of the extreme waves it the World Ocean as the risk factors for strength and reliability of ships and offshore structures popup.stage_title Head Serdjuchenko Anatoly Mykolajovych, Registration Date 05-02-2010 Organization National University of shipbuilding named after admiral Makarov popup.description2 Subject of the investigations - surface wind-generated waves in the World ocean. Goal of the investigations - analysis, investigations and generalization of the short- and long-term statistical distributions for wind-generated waves in the World ocean, and investigations of the local hydrodynamics of extreme waves in the high nonlinear approaches. Investigation techniques -- asymptotical methods, nonlinear hydrodynamics techniques, Hamiltonian formalism. General results - In the long-term statistics of wind-generated waves distributions for the wave heights and periods have been studied an approximated by using Gumball distribution for some regions of Black sea, Mediterranean sea and Atlantic ocean. For the short-term distributions of wind-generated waves the generalized asymptotical series have been derived up to 12-th order in the nonlinearity for marginal distributions and up to 5-th order in the nonlinearity for three-dimensional distributions of wave elevations. Special technique for estimating of the moments and cumulants of the distributions in terms of the characteristic steepness of irregular wave has been elaborated. In the hydrodynamics of weakly nonlinear wave groups the generalized multi-scale technique for the solution of Nonlinear Schr?dinger Equations (NLS) up to 5-th order in nonlinearity for surface deep-water waves has been developed. The generalization is directed to suppressing the nonphysical secular solutions in the high approaches. The complete family of the generalized stationary solutions of the 3-rd order NLS equation has been derived in terms of elliptical Wejershtruss and Jacobi functions. For strongly nonlinear surface deep-water waves Hamiltonian equations have been derived an for the special case of periodical finite amplitude waves - classical Stokes waves and asymmetrical wind-generated waves - the solutions of the equations have been considered. The results obtained in the investigation project may be considered as a fundamental in corresponding with the world practice in the investigations of nonlinear wave motions. Practical aspects of the results may be used in the oceanology, ocean engineering and offshore structures, shipbuilding. Product Description popup.authors Ємельянова Т. В Верешко О. Казакова Г. Морозан Л.М. Приходько С.Б. Слободян Т.В. Соломенцев О.І. Теляга Л. popup.nrat_date 2020-04-02 Close