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http://dx.doi.org/10.5916/jkosme.2015.39.4.489

Comparison Study of the Impact Response Characteristics of Fixed Cylindrical Offshore Structures Considering Seawater Fluid Region  

Lee, Kangsu (Offshore Plant Engineering Division, Korea Research Institute of Ships and Ocean Engineering)
Hong, Keyyong (Offshore Plant Engineering Division, Korea Research Institute of Ships and Ocean Engineering)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.39, no.4, 2015 , pp. 489-494 More about this Journal
Abstract
This research focused on minimizing the response of fixed cylindrical offshore structures to a ship impact considering the seawater fluid part. A collision between a ship and offshore structure is generally a complex problem and it is often impractical to perform rigorous finite element analyses to include all the effects and sequences during the collision. The structural behavior of a fixed cylindrical type offshore substructure with a seawater fluid part has a simpler response and small deformation due to the dissipation of impact energy. Upon applying the impact force of a ship to the cylindrical structure, the maximum acceleration, internal energy, and plastic strain are calculated for each load cases using Ls-dyna finite element software. In the maximum cases 2.0 m/s velocity, the response result for the structure was carried out to compare between having a fluid region and no fluid region. Fluid-structure interaction analysis was performed using the ALE method, which make it possible to apply a fluid region on the impact problem. The case of a fixed cylindrical type offshore structure without a seawater fluid part can be a more conservative design.
Keywords
Offshore structure; Collision; Plastic strain; Seawater fluid; Dynamic response; Accidental limit state;
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Times Cited By KSCI : 1  (Citation Analysis)
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