基于正交试验的弧形胸墙波浪载荷对波要素的敏感性分析

Sensitivity of wave loads on arc crown wall to wave parameters based on orthogonal test

以复合式海堤弧形胸墙为研究对象,选择3个因素——水深、波高、波周期,每个因素取4个水平,按照正交表L16(43)设计相关试验组次研究上述因素对复合式海堤弧形胸墙波浪载荷的影响显著性。同时研究弧形胸墙波压力分布规律和波浪载荷时程变化规律。结果表明:对于弧形胸墙压力即时分布,点位与点位之间没有固定的大小关系,但整体上来说,胸墙迎浪面下半部分的波压力普遍大于上部分;在单个波浪周期作用过程中,水平波浪力存在2个峰值,垂向波浪力存在1个峰值2个谷值,垂向波浪力峰值与水平波浪力第1个峰值几乎同时达到,此时对胸墙的稳定性最为不利;水深对波浪载荷的影响最为显著,波高其次,波周期的影响相对最小。

Taking the composite sea embankment arc crown wall as the research object, three main factors, including water depth, wave period and wave height, were chosen to carry out the orthogonal test. Sixteen test schemes were designed by choosing four levels to each parameter stated above by L16（43） orthogonal table to study the influencing significancy of the wave loads on composite sea embankment arc crown wall. Meanwhile, the wave pressure distribution and schedule change rule of wave loads are studied. The results show that there＇s no fixed relationship between each two point pressures for the wave pressure distribution. However, the wave pressure on the lower part of the arc crown wall surface is generally greater than that of the upper part as a whole; In the process of a single wave cycle, the horizontal wave force has two peaks, while there are three peaks of the vertical force. The second peak of vertical wave load and the first peak of horizontal wave load appear almost simultaneously, which is the worst moment for the stability of the arc crown wall; The effect of water depth on arc crown wall wave loads is the most significant, that of wave height secondly, and the impact of wave period is relatively minimal.