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中文摘要：
有在宽波浪盆的有限的水深度和无限的水深度的水里的陡峭的水波浪火车的不稳定性的一系列实验被执行。在 modulational 不稳定性和 class-II 不稳定性的联合发展中，起始的二维的陡峭的波浪火车演变为三维的新月状的波浪，这被发现，由混乱的水表面的出现列在后面，并且波浪精力在水表面举起的振幅光谱转了到边带。结果也证明水深度在 modulational 不稳定性和新月状的波浪的进化的生长上有重要效果。越大水深度， modulational 不稳定性越快速压制 class-II 不稳定性。
英文摘要：
A series of experiments on the instability of steeP water wave trains in water with finite water depths and infinite water depths in a wide wave basin were performed. It was found that under the coupled development of modulational instability and class-Ⅱ instability, the initial two-dimensional steep wave trains evolved into three＇dimensional crescent waves, followed by the occurrence of disordered water surfaces, and that the wave energy transferred to sidebands in the amplitude spectrum of the water surface elevation. The results also show that water depth has a significant effect on the growth of modulational instability and the evolutiin of crescent waves. The larger the water depth, the more quickly the modulational instability suppresses class-II instability.
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