Faculty of Arts of Social Sciences

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Browsing Faculty of Arts of Social Sciences by Subject "Analysis of Wave Restoring Forces Due To Oscillation of a Rectangular Barge"

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    Analysis of Wave Restoring Forces Due To Oscillation of a Rectangular Barge and Their Effects on Construction of Offshore Structures
    (Egerton University, 2024-09) Kibet Hillary
    Waves are a common phenomenon in the ocean environment and are caused when energy is transmitted across the water surface and their effects have prompted studies on hydrodynamic loads on offshore structures. When interactions of waves occur with offshore structures, there is damping of wave loads, which are added mass, damping coefficients and restoring forces and moments, on them. Most researchers have worked on restoring forces and moments of oscillating bodies with forward speed in 2 dimensions. However, little has been done with regard to an oscillating rectangular barge with zero forward speed in a 3-dimensional axis. This study therefore analyzed the wave restoring forces due to oscillation of a rectangular barge and their effects on the construction of offshore structures. To do this, it was necessary that the solution of the velocity potential of the outgoing waves be derived from the radiation potential after which the added mass and the damping coefficients were derived. This aided in the derivation and analysis of the restoring forces of the oscillating rectangular barge. From the velocity potential, the series form of the Greens function was used since its results asymptotically converged more easily than those of the integral form and at the same time eliminated irregular frequencies. Additionally, the wave characters of the outgoing waves were predicted from those of the incoming waves. The simulation process was done using the Fortran software to generate data which was later run in the origin software to generate graphs for further discussion. The findings in this thesis will aid in reducing the computational effort required in the design of offshore floating structures, especially at phases where load instances must be considered, and ensures modelling of offshore structures with high restorative forces. This research can further be extended to analysis of wave restoring moments for a rectangular barge oscillating at zero forward speed.