Numerical analysis of shipping water impacting a step structure

OCEAN ENGINEERING

卷:209

Article

Khojasteh, Danial¹  Tavakoli, Sasan²  Dashtimanesh, Abbas³  Dolatshah, Azam^2,4  Huang, Luofeng⁵  Glamore, William¹  Sadat-Noori, Mahmood¹  Iglesias, Gregorio^6,7,8 

[1] UNSW Sydney, Water Res Lab, Sch Civil & Environm Engn, Sydney, NSW, Australia

[2] Univ Melbourne, Dept Infrastruct Engn, Parkville, Vic 3031, Australia

[3] Tallinn Univ Technol, Estonian Maritime Acad, EE-11712 Tallinn, Estonia

[4] Swinburne Univ Technol, Fac Sci Engn & Technol, Hawthorn, Vic 3122, Australia

[5] UCL, Dept Mech Engn, London, England

[6] Univ Coll Cork, MaREI Ctr, Environm Res Inst, Coll Rd, Cork, Ireland

[7] Univ Coll Cork, Sch Engn, Coll Rd, Cork, Ireland

[8] Univ Plymouth, Sch Engn, Marine Bldg, Plymouth PL4 8AA, Devon, England

关键词: Green water;    Floating structures;    Dam-break;    Impact force;    CFD;    OpenFoam;   

DOI  :  10.1016/j.oceaneng.2020.107517

来源: Elsevier

【 摘 要 】

Shipping water, the flow washing over and impacting the upper decks of ships and offshore structures, occurs frequently during their service life and often causes structural problems. For engineers to design safe floating structures subjected to shipping water it is essential to gain an in-depth understanding of its depth and flow field, and the resulting impact forces. In this work, Computational Fluid Dynamics (CFD) is applied to understand the physics of shipping water washing over a stepped platform. We find that the most accurate solutions are obtained with the k - epsilon turbulence closure. The hydrodynamic load generated by the shipping water is found to strongly depends on the kinematic energy of the water hitting the step. It is shown that with smaller values of the freeboard a more dynamic flow ensues, with a stronger vortex and larger velocity gradient resulting in deeper shipping water and a larger impact force.

【 授权许可】

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