hydrophysicsФундаментальная и прикладная гидрофизикаFundamental and Applied Hydrophysics2073-66732782-5221St. Petersburg Research Center of the Russian Academy of Scienceshydrophysics-1130Research ArticleВЗАИМОДЕЙСТВИЕ МОРСКИХ ОБЪЕКТОВ, ОКЕАНА И АТМОСФЕРЫINTERACTION OF MARINE OBJECTS*, OCEAN‏ AND ‏ATMOSPHEREМоделирование воздействия внутренних волн на морские платформы для гидрологических условий шельфовой зоны о. СахалинModeling of internal wave action on offshore platforms for hydrological conditions of the Sakhalin shelf zoneРувинскаяЕ. А.RouvinskayaE.

Nizhny Novgorod

КуркинаО. Е.KurkinaO.

Nizhny Novgorod

КуркинА. А.KurkinA.

Nizhny Novgorod

ЗайцевА. И.ZaytsevA.

г. Южно-Сахалинск

Nizhny Novgorod

Yuzhno-Sakhalinsk

Нижегородский государственный технический университет им. Р. Е. АлексееваРоссияNizhny Novgorod State Technical University n. a. R. E. AlekseevRussian FederationНижегородский государственный технический университет им. Р. Е. Алексеева; Специальное конструкторское бюро средств автоматизации морских исследований ДВО РАНРоссияNizhny Novgorod State Technical University n. a. R. E. Alekseev; Special Research Bureau for Automation of Marine Researches, Far Eastern Branch of Russian Academy of SciencesRussian Federation2017291120221046170Copyright © Рувинская Е.А., Куркина О.Е., Куркин А.А., Зайцев А.И., 20222022Рувинская Е.А., Куркина О.Е., Куркин А.А., Зайцев А.И.Rouvinskaya E., Kurkina O., Kurkin A., Zaytsev A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://hydrophysics.spbrc.ru/jour/article/view/1130

Оцениваются динамические нагрузки на подводные вертикальные цилиндрические части морских платформ при воздействии полнонелинейных внутренних волн, генерируемых многокомпонентным баротропным приливом, распространяющимся вдоль вертикального разреза над неровностями дна в условиях Охотского моря (залив Анива, юго-восточная часть шельфовой зоны острова Сахалин). Эволюция этого процесса анализируется с помощью численной модели для уравнений Эйлера, описывающих движение несжимаемой стратифицированной по плотности жидкости в вертикальной плоскости. Интенсивность силы давления на подводную боковую поверхность опоры морской платформы и ее расчетный изгибающий момент выражаются в соответствии с формулой Морисона для цилиндрической сваи диаметром 2.5 м и высотой 42 м и рассчитаны как функции времени. Во время приливного цикла эти характеристики могут достигать значений 2.3∙105 Н и 4.8∙106 Н∙м, соответственно. Определена также частота появления больших пиковых значений в поле скорости внутренних волн и вероятности соответствующих этим пикам высоких нагрузок. Значительная неравномерность распределения скорости, а также динамических нагрузок по глубине является типичной особенностью воздействия внутренних волн.

Dynamical loads are estimated on underwater vertical cylindrical parts of offshore platforms from the forcing of fully nonlinear internal wave motions generated by multicomponent barotropic tidal flow over topography along a vertical section for the conditions of the Sea of Okhotsk (Aniva Bay, near the south-eastern part of the Sakhalin Island shelf). The evolution of this process is analysed using numerical model of Euler equations for incompressible density-stratified fluid in a vertical plane. The intensity of pressure on lateral underwater surface and the rate inertia moment are expressed according to Morison’s formula for a cylindrical pile of 2.5 m diameter and 42 m height and computed as functions of time. They can reach values of 2.3∙105 N and 4.8∙106 N∙m, respectively, during the tidal cycle. The frequency of the appearance of large peak values in the internal wave velocity field and the probabilities of the corresponding high loads are also calculated.

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