Nonlinear Coupled Dynamic Response of a Semi-submersible Platform
The dynamic behavior of a conventional semi-submersible was investigated both numerically and experimentally in regular and irregular waves. In the mathematical model, the dynamic equilibrium equationswere developed and solved in time domain using a common reference axis system fixed on the mean...
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| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Published: |
2010
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| Subjects: | |
| Online Access: | http://eprints.utp.edu.my/2916/1/10TPC-363Kurian.pdf http://eprints.utp.edu.my/2916/ |
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| Institution: | Universiti Teknologi Petronas |
| Summary: | The dynamic behavior of a conventional semi-submersible was
investigated both numerically and experimentally in regular and
irregular waves. In the mathematical model, the dynamic equilibrium
equationswere developed and solved in time domain using a common
reference axis system fixed on the mean sea water level.The wave force
calculations were based on the modified version of Morison Equation
applied at the displaced position of the structure.Mooring system
contribution to dynamic behavior was evaluated numerically using
nonlinear catenary equations. The mooring stiffness matrix was
evaluated interms of the mooring fairleader coordinates and spring constants. Experimentally, a twin hulled semi-submersible with a scale of 1:100 was tested in regular and irregular waves with the model oriented in the head, beam and quartering directions. The experimental measurements validated the accuracy of the numerical model.
KEYWORDS:Equation of motion (EOM);Fast Fourier
transformation (FFT);Response amplitude operator (RAO); Semisubmersible
model; Time domain analysis; Wave basin testing. |
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