为了分析不同参数对深水波浪破碎过程中的波面特征、波谱特征及特征波参数变化的影响,在波浪水槽中,采用能量聚焦的方式生成了深水破碎波浪,沿程采集22个不同位置的浪高数据进行分析.相同的波浪破碎强度时,中心频和频宽对波浪的稳定性影响很小,而谱型对波面最大陡度的影响比较明显,且破碎前更加显著.中心频越小,频宽越窄,谱型为PM谱时,波谱密度峰值越大,且谱包络总能量也越大.PM谱型下波浪破碎导致的波特征参数变化率最小,等振幅谱(CWA)型下次之,等波陡谱(CWS)型下的影响最为显著.
To analyze the influence of different parameters on wave surface, wave spectrum, and wave parameters changes in the processes of deep-water wave breaking, deep?water breaking waves were generated by the method of energy focusing in a wave flume. Wave height data were recorded and analyzed at 22 different positions in the flume. For breaking waves having the same intensity, center frequencies and frequency bandwidth had little effect on the wave stability, but spectral types clearly affected the maximum steepness of the wave surface, which was more obvious before wave breaking. For breaking waves having the same intensity, the smaller the center frequency and the narrower the frequency bandwidth, the greater the peak value of spectral density and the bigger the total en?ergy of spectral envelope in the PM spectrum. The change rate of characteristic wave parameters induced by wave breaking is the smallest for the PM spectrum, larger for the CWA spectrum, and largest for the CWS spectrum.