不同因素对潜堤波浪传播的影响

Wave propagation on submerged breakwater with different wave factors

针对波浪穿过梯形潜堤时的波浪形态沿程变化问题,以梯形潜堤为研究对象,通过二维水槽试验,研究梯形潜堤上规则波的传播特征。以比波高为参数分析不同波浪要素(波高、周期和水深等)对波浪传播变形的影响。试验结果表明,其他条件不变时,入射波高越大、波浪周期越小、堤顶淹没水深越小时,波高在潜堤上方衰减越明显。在有足够水深,且波高较小时,波浪对潜堤均有良好的穿透性;波高较大时,波浪在潜堤上部发生破碎,波浪穿过潜堤后波高衰减,此时潜堤的消波作用明显;在波浪不发生破碎情况下,较长周期波浪在潜堤顶部比波高增大,且出现双峰值。

In view of the variety of wave form, we conduct-dimension physical model experiments to studyregular wave propagation over trapezoid submerged breakwater.We consider the effect of different wave elements （wave height,period and water depth） respectively to analysis the transformation of regular waves,and use waveheight ratio as a relative parameter.The experiment results show that,the higher incident wave height, the smaller wave period and the smaller water depth leads to more obvious wave height attenuation with other conditions unchanged.Waves with enough water depth and smaller wave height propagate through submerged breakwater well; as wave height increasing, wave breaking happens on the top of submerged breakwater, and then wave height ratiodecreases after it; for wave un-breaking and longer wave period cases, wave height ratio increases with two peakvalues on the top of structure.