Analysis of pipeline stress-strain state in seabed laying
Analysis of a pipeline bending in laying on a rigid seabed is carried out. The pipeline is modeled by a semi-infinite hinged elastic beam. Length of its sagging part is not known and is defined in the result of calculations. A formula for hydrostatic loading of a rod is derived in the paper; it is shown that in some cases simplified accounting of the loading by reduction of the rod’s weight for the weight of the liquid superseded leads to significant errors. The seabed reaction is found for two rod models: the classical and Timoshenko ones. Analytical expressions are received and internal forces, moments, and stresses arising in the pipeline are shown depending on the distance from the seabed and liquid pressure. The pipeline’s preliminary tension is considered.
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asymptotic solution; elastic rod; hydrostatic loading; pipeline laying; seabed reaction; асимптотика; гидростатическая нагрузка; реакция дна; укладка трубопровода; упругий стержень References to this article (GOST) T.V. Zinovieva. Analysis of pipeline stress-strain state in seabed laying // Electronic scientific journal "Oil and Gas Business". 2011. №1. P.237-253. URL: http://ogbus.ru/eng/authors/Zinovieva/Zinovieva_1e.pdf