不规则波工况下弧形防浪墙波浪载荷试验研究

Test research of the wave loads on arc crown wall in irregular waves

现有关于弧形防浪墙的研究大多是针对越浪量的,对其上波浪载荷的研究涉及的不多.为弥补现有研究成果的不足并为弧形防浪墙稳定性设计提供参考,文中以复式海堤弧形防浪墙为例,以1∶15为比尺设计了不规则波断面模型试验.布置压力探头对弧形迎浪面的波压力信号进行采集,通过积分法得出合力.通过对不规则波作用下弧形防浪墙所受波浪载荷峰值的概率分布和波浪载荷变化规律进行研究,得出:威布尔分布公式对弧形防浪墙不规则波作用下波浪载荷的概率分布进行拟合效果良好;水平波浪力、垂直波浪力和波浪力矩的最大值、2%累计频率值以及1/3大值平均值均随水深的增大而增大,随波周期的增大而增大,随波高的增大而增大.

Current researches on arc crown wall are mostly about overtopping,and only a few researches involve the wave loads on it. In order to make up for the current achievements and to provide reference for the stability design of arc crown wall,cross-section model test under irregular wave conditions is designed with the scale1 ∶ 15,taking composite sea embankment arc crown wall as the example. Wave loads are calculated by integration of pressure signals collected through pressure probes set on the surface of the arc crown wall. The probability distribution of wave loads as well as the wave loads variation on arc crown wall in irregular waves is studied. Test results show that Weibull distribution in well with the probability distribution of wave loads on arc crown wall in irregular waves; The maximum value,the 2% cumulative frequency value and the one third big average value of horizontal wave load increase significantly with the increase of water depth,wave period and wave height,so do those of the vertical wave load and the wave moment.