Abstract
Submerged horizontal plates are widely employed in research of wave structure interaction as a simplification of coastal and ocean engineering structures. The hydrodynamic performance of submerged horizontal plates under focused waves has been seldom reported. Based on potential flow theory, this paper presents a general solution of the hydrodynamic pressure and wave forces exerted on submerged plates by a focused wave group. An existing experiment and two limiting cases are used to validate the accuracy of the present analytical model. With the validated model, the effect of wave properties and the configuration of the wave structure system on the hydrodynamic performance of submerged plates are investigated. It is found that the hydrodynamic performance of submerged horizontal plates varies with incident focused wave with different peak frequencies. The structural breadth significantly changes the hydrodynamic performance while the structural height has little influence. This paper shows the usefulness of potential flow theory for the preliminary calculation of wave loads on coastal and ocean engineering structures generated by focused waves.
Highlights
During the service period of offshore and coastal structures, freak waves, alternatively named rogue waves or extreme waves, which have been observed in the ocean [1] and coastal zones [2] are great threats to structural safety
A general solution of focused wave action on a submerged plate was obtained based on potential flow theory and matching eigenfunction methods
The validated analytical model can estimate the wave forces acting on a submerged plate in comparison with existing experimental studies
Summary
During the service period of offshore and coastal structures, freak waves, alternatively named rogue waves or extreme waves, which have been observed in the ocean [1] and coastal zones [2] are great threats to structural safety. With successfully generated focused waves, various studies were conducted to investigate freak wave action on structures experimentally and numerically. General structural members, such as vertical and horizontal cylinders, were examined by researchers. The analytical method based on potential flow theory was successfully applied to investigate wave action on submerged plates with different layouts [28] and caissons [29] as validated by experimental results [30]. Considering convenience and efficiency, the analytical model was employed to study the effects of wave properties and the configuration of the wave structure system on the hydrodynamic performance of submerged plates in this paper.
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