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Citation:
 Shiqiang Yan,Qingwei Ma and Xiaoming Cheng.Numerical Investigations on Transient Behaviours of Two 3-D Freely Floating Structures by Using a Fully Nonlinear Method[J].Journal of Marine Science and Application,2012,(1):1-9.[doi:10.1007/s11804-012-1099-0]
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Numerical Investigations on Transient Behaviours of Two 3-D Freely Floating Structures by Using a Fully Nonlinear Method

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Title:
Numerical Investigations on Transient Behaviours of Two 3-D Freely Floating Structures by Using a Fully Nonlinear Method
Author(s):
Shiqiang Yan Qingwei Ma and Xiaoming Cheng
Affilations:
Author(s):
Shiqiang Yan Qingwei Ma and Xiaoming Cheng
1. School of Engineering and Mathematical Sciences, City University London, London EC1V 0HB, United Kingdom 2. GL-Noble Denton UK, London EC2A 4AA, United Kingdom
Keywords:
ully nonlinear interaction two floating structures transient behaviours potential flow QALE-FEM method
分类号:
-
DOI:
10.1007/s11804-012-1099-0
Abstract:
wo floating structures in close proximity are very commonly seen in offshore engineering. They are often subjected to steep waves and, therefore, the transient effects on their hydrodynamic features are of great concern. This paper uses the quasi arbitrary Lagrangian-Eulerian finite element method (QALE-FEM), based on the fully nonlinear potential theory (FNPT), to numerically investigate the interaction between two 3-D floating structures, which undergo motions with 6 degrees of freedom (DOFs), and are subjected to waves with different incident angles. The transient behaviours of floating structures, the effect of the accompanied structures, and the nonlinearity on the motion of and the wave loads on the structures are the main focuses of the study. The investigation reveals an important transient effects causing considerably larger structure motion than that in steady state. The results also indicate that the accompanied structure in close proximity enhances the interaction between different motion modes and results in stronger nonlinearity causing 2nd-order component to be of similar significance to the fundamental one.

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Memo

Memo:
EPSRC/FSC (EP/I502033/1) and Leverhulme Trust (ECF/40348), UK.
Last Update: 2012-03-15