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Finite-element computation of wave impact load due to a violent sloshing

✍ Scribed by Jo Hyun Kyoung; Sa Young Hong; Jang Whan Kim; Kwang June Bai

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
406 KB
Volume
32
Category
Article
ISSN
0029-8018

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✦ Synopsis

A nonlinear sloshing problem is numerically simulated. During excessive sloshing, the sloshinginduced impact load can cause a critical damage on the tank structure. Recently the problem becomes an important research topic in LNG (Liquefied Natural Gas) Tanker and FPSO (Floating Production Storage Offloading) design. In this study, the wave impact load on the structure is obtained numerically by imposing the exact nonlinear free surface conditions and compared with that predicted by Morison's formula. As a theoretical model, a three-dimensional free surface flow in a tank is formulated in the scope of potential flow theory with the exact nonlinear free-surface conditions. A finite-element method based on Hamilton's principle is employed as a numerical method. The problem is treated as an initial-value problem. The nonlinear problem is numerically solved through an iterative scheme at each time step.

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