畸形波作用下双层水平板防波堤压力分布特性研究

发布时间：2018-03-28 16:05

  本文选题：畸形波　切入点：双层水平板式防波堤　出处：《海洋学报》2017年05期

【摘要】：基于物理模型试验,考虑畸形波参数、相对板宽、相对波高等影响因素,就畸形波对平顶双层水平板防波堤作用进行研究。首先对畸形波作用下双层水平板的波浪力分布特征进行了讨论,然后就最大波动压强、结构最大总垂向力与不规则波作用进行了对比分析。结果表明,畸形波作用下,双层水平板最大波动压力出现在前端迎浪区域附近,向尾端逐渐递减。双层水平板4个受力面的压力分布不同且有相位差,4个受力面的最大波动压力时间差约在0.1T_p~0.4T_p范围内变化。与不规则波作用比较,畸形波作用没有显著改变波压包络分布特征,但增大了波压包络强度值。试验范围内,就最大总力而言,两者最大总浮托力比值在1.06~2.45间变化;向下的最大总垂向力比值在1.22~2.07之间变化;就波动压力而言,其增大的幅度与畸形波参数α_1相关性最强,随α_1的增大而增大,在α_1=2.04~3.1试验范围内,畸形波作用时的最大压强比不规则波作用时可约增大20%~80%。就最大波吸力而言,两者的比值与畸形波参数α_4相关性最强,随α_4的增大而减小。在α_4=0.62~0.75试验范围内,最大波吸力强度的比值在1.61~0.87范围内变化。当α_4≤0.72时,畸形波作用时的最大波吸力大于不规则波作用时的最大波吸力;当α_40.72时则刚好相反。
[Abstract]:Based on the physical model test, the parameters of abnormal wave, the relative plate width and the relative wave height are considered. In this paper, the effect of deformities on the breakwater of flat-top bilayer horizontal plate is studied. Firstly, the wave force distribution characteristics of bilayer horizontal plate under the action of deformities are discussed, and then the maximum wave pressure is discussed. The maximum vertical force of the structure and the action of irregular wave are compared and analyzed. The results show that the maximum wave pressure of the bilevel horizontal plate appears near the front wave area under the action of the deformable wave. The pressure distribution is different and there is phase difference in the four stress planes of the bilayer horizontal plate. The time difference of the maximum wave pressure of the four surfaces changes in the range of 0.1T_p~0.4T_p, which is compared with the action of irregular wave. The distribution of wave pressure envelope was not significantly changed by the action of abnormal wave, but the intensity of wave pressure envelope was increased. In terms of the maximum total force, the ratio of the maximum total buoyant force and the maximum total buoyant force was between 1.06n2.45 and 1.06 ~ 2.45, respectively. The downward ratio of maximum total vertical force varies between 1.22 and 2.07. In terms of wave pressure, the amplitude of increase is the most relevant to the parameter 伪 _ 1 of abnormal wave, and it increases with the increase of 伪 _ 1, in the range of 伪 _ 12.043.1. The maximum pressure under the action of abnormal wave can be increased by about 20% compared with that of irregular wave. In terms of maximum wave suction, the ratio of the two increases most closely to the parameter 伪 _ 4 of the abnormal wave, and decreases with the increase of 伪 _ 4. In the range of 伪 _ 4 ~ (4) ~ (0. 62) ~ (0.75), When 伪 _ 4 鈮，

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