novtexmechМехатроника, автоматизация, управлениеMekhatronika, Avtomatizatsiya, Upravlenie1684-64272619-1253Commercial Publisher «New Technologies»10.17587/mau.16.209-216novtexmech-146Research ArticleЖУРНАЛ В ЖУРНАЛЕ "УПРАВЛЕНИЕ И ИНФОРМАТИКА В АВИАКОСМИЧЕСКИХ И МОРСКИХ СИСТЕМАХ"JOURNAL WITHIN JOURNAL "CONTROL AND INFORMATICS IN AEROSPACE AND MARINE SYSTEMS"Динамическое воздействие "волны-убийцы" на контур морского суднаDynamic Impact of Rogue Wave on a Seagoing Vessel ContourДорожкоВ. М.DorozhkoV. M.bendor@iacp.dvo.ruИнститут автоматики и процессов управления ДВО РАН, г. ВладивостокРоссияInstitute of Automation and Control Processes, Far East Branch, Russian Academy of Sciences (IACP FEB RAS), 690041, Vladivostok, Russian FederationRussian Federation201528082018163209216Copyright © Commercial Publisher «New Technologies», 20182018Commercial Publisher «New Technologies»Commercial Publisher «New Technologies»https://mech.novtex.ru/jour/about/submissions#copyrightNoticehttps://mech.novtex.ru/jour/article/view/146

На основе метода вычислительной гидродинамики разработана технология моделирования динамического воздействия "волны-убийцы" на контур морского судна. Получены зависимости от времени скоростей и сил перемещения контура, угла, угловой скорости и ускорения, момента сил и момента импульса контура. Установлено, что контуры судов водоизмещением до 92 600 т опрокидываются "волнами-убийцами" высотой 30 м. Полученные результаты могут быть использованы при проектировании морских судов, а также при разработке мероприятий по обеспечению безопасности судоходства.

The article is devoted to the study of a numerical modeling of the impact of a rogue wave on a full-sized contour (middle-vessel cross section) in order to obtain the quantitative estimates of its motion parameters. The numerical simulation of rogue wave with the height of 30 meters and wavelength of 120-190 meters was fulfilled in a numerical wave tank with the length of 1000 meters and water depth of 250 meters, which was characterized by the following key features: a) Computational Fluid Dynamics theory; b) Reynolds-Averaged Navier-Stokes Equations using the Volume of Fluid method of the free surface and Three Degrees of Freedom method for describing the movement of the contour. Two maxima in the process of nonlinear transformation of a rogue wave were discovered. Free-floating contour was used to simulate a capsizing due to a rogue wave. Contour was mounted on the surface of the water in such a way that its position in the future would coincide with the x-coordinate of the second maximum of the rogue wave. The maximum of the water velocity in the area, located in the midst of the front, exceeded the velocity of the rogue wave. This caused the beginning of formation of a water jet from the specified zone named as plunging breaker. Simultaneous lifting, horizontal movement at high speed and capsizing of the contour were caused due to a huge steepness of the rogue wave front. The paper treats in detail the aspects associated with the numerical modeling of the contour capsize and estimation of the parameters of its motion. The time histories of the computed velocity of displacement, heeling angle, angle velocity and acceleration, forces, moment of impulse, power of heeling moment, heeling moment of the contour were calculated. The study indicates that the contours of the vessels of up to 9260 t cannot resist the heeling action of the rogue wave. Average capsizing time is half of the period of the rogue wave, which eliminates a chance for vessel's maneuver. Therefore, we can recommend the skippers to avoid swimming sideways to a wave even in calm sea conditions.

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The authors declare that there are no conflicts of interest present.