Experimental study on the hydrodynamic characteristics of a Bragg breakwater with triple vertical plates

Abstract The hydrodynamic characteristics of a Bragg breakwater with triple vertical plates in monochromatic regular waves are experimentally studied. two spacings between the every adjacent denoted by S 1 and 2 respectively which both wide enough for necessary reflection, is equal or unequal to . A series experiments carried out wave flume equipped piston-type generator, performance analysed variation spacing , plate draft d freeboard wavelength L steepness H / ( height). Special attention paid effects nonuniform on reflection. In addition, comparisons fixed unrestrained positioning also presented. results show that transmission coefficients mostly smaller than spacings, intensity bandwidth reflection increased non-uniform spacings. Under positioning, movements have no serious attenuation performances breakwater. Moreover, trough coefficient occurs at left primary condition due resonance energy dissipation not just resonance.