Cnoidal wave induced seabed response around a buried pipeline

OCEAN ENGINEERING

卷:101

Article

Zhou, Xiang-Lian^1,2  Zhang, Jun^1,2  Guo, Jun-Jie²  Wang, Jian-Hua²  Jeng, Dong-Sheng^2,3 

[1] Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Ctr Marine Geotech Engn, Shanghai 200240, Peoples R China

[3] Griffith Univ, Griffith Sch Engn, Nathan, Qld 4222, Australia

关键词: Cnoidal wave;    Porous seabed;    Pipeline;    Liquefaction;   

DOI  :  10.1016/j.oceaneng.2015.04.032

来源: Elsevier

【 摘 要 】

The evaluation of wave-induced pore pressures and effective stresses in a poroelastic seabed is important for coastal and ocean engineers in the design of marine structures. Most previous theoretical investigations have focused commonly on the Stokes wave induced seabed response. In this paper, a cnoidal wave-seabed-pipeline system is modeled using the finite element method. Taylor's expression and the precise integration method are used to estimate the Jacobian elliptic function. The seabed is treated as a poroelastic medium and is characterized by 'Biot's partly dynamic equations (u-p model). The pore water pressure and effective vertical stress on the poroelastic seabed around a buried pipeline are examined. Based on the numerical results, a parametric study is conducted to examine the effects of wave and seabed characteristics on the seabed response. Comparison with the cnodial wave and Stokes wave induced seabed response is also demonstrated here. It implies that the difference between the maximum pore pressure and vertical effective stress induced by the cnoidal wave and Stokes wave may reach 60-70%. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

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