Free-surface oscillations within a square harbor subjected to solitary waves are investigated through physical experiments. The effects of various wave heights and water depths on the resonance within the harbor are examined. In this study, the technique of wavelet-based bicoherence spectra is employed for the first time to investigate the nonlinear wave–wave interaction of the transient harbor resonance induced by solitary waves. The results show that the relation between the maximum surface elevation, η_max, within the harbor and the incident wave height of a solitary wave can be regarded as approximately linear. Moreover, for the same incident solitary wave height, the larger the water depth is, the greater the value of η_max becomes. The analyses of the wavelet-based bicoherence indicate that the natural modes of the harbor are generated in the following two ways: (1) direct generation from the energy transfer of the solitary waves, and (2) the subsequent generation from the nonlinear interaction between various wave components. The first mechanism plays a decisive role in the generations of low-order natural modes, while the second mechanism also has a vital catalytic role in triggering higher-order modes. Finally, it is examined that the duration of harbor oscillations changes obviously with incident wave heights and water depths.

通过物理实验研究了方形港口内受到孤立波影响的自由表面振动。研究了各种波高和水深对港口内共振的影响。在这项研究中，首次采用基于小波的双相干光谱技术来研究孤波引起的瞬态港湾共振的非线性波-波相互作用。结果表明，最大表面标高之间的关系η_最大，海港内，并且孤波的入射波高度可视为大致线性的。此外，对于相同的入射孤波高度，水深越大，越大的值η_最大成为。对基于小波的双相干性的分析表明，港口的自然模态是通过以下两种方式生成的：（1）从孤立波的能量传递直接生成，以及（2）从两者之间的非线性相互作用生成后续生成。各种波浪成分。第一种机制在低阶自然模式的产生中起着决定性的作用，而第二种机制在触发高阶模式时也起着至关重要的催化作用。最后，研究表明，港湾振荡的持续时间随入射波高和水深的变化而明显变化。