Scour below pipelines and around vertical piles due to second-order random waves plus a current

被引：39

作者：

Myrhaug, Dag ^{[1
]}

Ong, Muk Chen ^{[1
]}

Foien, Henrik ^{[1
]}

Gjengedal, Cecilie ^{[1
]}

Leira, Bernt J. ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Marine Technol, NO-7491 Trondheim, Norway

来源：

OCEAN ENGINEERING | 2009年 / 36卷 / 08期

关键词：

Scour depth; Pipeline; Vertical pile; Shear stress; Nonlinear random waves; Current; Stochastic method; BOTTOM FRICTION;

D O I：

10.1016/j.oceaneng.2009.02.007

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

This paper provides a method by which the scour depth below pipelines and around single vertical piles for combined random waves plus current including effects of second-order wave asymmetry can be derived. Here the empirical formulas proposed by Sumer and Fredsoe [1996. Scour below pipelines in combined waves and current. In: Proceedings of the 15th OMAE Conference, Florence, Italy. Vol. 5, ASME, New York, pp. 595-602] for pipelines, and by Sumer and Fredsoe [2002. The mechanics of scour in the marine environment. World Scientific, Singapore] for vertical piles are used together with Stokes second-order wave theory by assuming the basic harmonic wave motion to be a stationary Gaussian narrow-band random process. Comparisons are made with the Sumer and Fredsoe [1996. Scour below pipelines in combined waves and current. In: Proceedings of the 15th OMAE Conference, Florence, Italy. Vol. 5, ASME, New York, pp. 595-602: 2001. Scour around pile in combined waves and current. journal of Hydraulic Engineering, 127(5), 403-411] data for linear random waves plus current. An example of calculation is also presented. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：605 / 616

页数：12

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