Journal
OCEAN ENGINEERING
Volume 244, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2021.110447
Keywords
Experimental study; Free surface breakwater; Flexible membrane; Transmission coefficient; Relatively long waves
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A new type of free surface breakwater structure was proposed in this study, with experiments showing that it could achieve nearly 50% wave attenuation performance in relatively long waves when compared to other breakwater structures.
In this paper, a new type of free surface breakwater is proposed for the purpose of wave attenuating in regular waves. The structure is made up of two parts: the rigid main body of a rectangle box piercing through the free surface, and the appendage structure with double flexible membranes hanging below the rectangle box. A series of preliminary experiments were carried out in a two dimensional (2D) wave flume, the wave attenuation performance of the proposed breakwater under different factors, including relative width B/lambda (box width B, wave length lambda), the relative draft d/lambda (box draft d), wave steepness H/lambda (wave height H), as well as the length of flexible membrane were investigated and in comparison with other derived breakwater structures, such as a rectangle box, a rectangle box connected with a single flexible membrane. The results indicated that the newly proposed breakwater could achieve almost 50% in wave-attenuating performance in relatively long waves.
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