This study experimentally investigates the evolution of mechanically generated waves mixed with wind-driven waves. The pre-existing wind-driven waves are time stable and space non-uniform during the tests. Empirical formulations for fetch laws of dimensionless wave energy and peak frequency of wind-driven waves at the laboratory scale are given. Experimental results show that the characteristics of mixed waves are affected by the variations in wind speed, fetch, wave period, and wave height. At small fetches, both waves are generally inhabited after mixing. With increasing fetch, the energy of the generated waves is enhanced at a large wave steepness level. When the frequency gap between the two wave types is small, mixed waves tend to have a chaotic wave evolution. However, the changes in the two types of waves are small when the frequency gap between the two waves is large. A frequency lock-in phenomenon of the wind-driven waves at high-order waves of the generated waves is found in the regular wave tests at large wave steepness levels. Such a phenomenon does not exist in present irregular wave tests. With increasing fetch, the spectrum of mixed waves downshifts at the beginning and upshifts at a large fetch.

这项研究通过实验研究了机械产生的波与风驱动波的混合演化。在测试过程中，先前存在的风波是时间稳定的并且空间不均匀。给出了在实验室范围内获取无量纲波能量和风驱动波峰值频率的规律的经验公式。实验结果表明，混合波的特性受风速，取水，波浪周期和波浪高度的变化影响。取水量较小时，通常在混合后都占据了这两个波浪。随着提取量的增加，所产生的波的能量在大的波陡度下会增强。当两种波类型之间的频率间隙较小时，混合波趋向于产生混沌波。然而，当两个波之间的频率间隙较大时，两种波的变化较小。在大波陡度下的常规波测试中，发现了风波在生成波的高次波处的频率锁定现象。在当前的不规则波测试中不存在这种现象。随着提取量的增加，混合波的频谱在开始时下移而在大提取时上移。