不规则波诱发港湾共振条件下的低频长波实验研究

Low-frequency long waves during harbor resonance induced by irregular waves

为了实现港湾共振条件下港内低频长波波浪要素的快速计算,本文通过物理模型实验研究了在港湾共振条件下,由外海不规则波浪要素来计算细长港口内低频长波波浪要素的方法。研究发现:经验公式和人工神经网络模型都可以利用外海的不规则波浪要素和当地水深来快速并准确地计算港内低频波浪成分的有效波高。通过对比港内低频长波的平均周期与外海不规则波浪的特征周期,发现它们之间并不存在明显的相关性。基于人工神经网络模型仍可以很好地利用外海不规则波浪要素和当地水深来计算港内低频长波的平均周期。

In order to realize fast calculation of the low-frequency wave parameters inside a harbor under the resonant conditions,this paper studies the methods for calculating the low-frequency long wave parameters inside a slender harbor with the offshore irregular wave parameters through physical model experiments of harbor resonance.The results showed that the significant low-frequency wave height inside the harbor could be quickly and accurately calculated by both empirical formula and artificial neural network model based on the offshore irregular wave parameters and local water depth.By comparing the mean period of the low-frequency long waves inside the harbor and characteristic periods of the irregular offshore waves,no significant correlation was found between them.The artificial neural network model can still perform well in computing the mean period of the low-frequency waves inside the harbor based on the offshore irregular wave parameters and local water depth.