改进的海浪波包谱

An improved wave envelope spectrum

结合实测波浪资料对描述波浪群性的主要特征参数进行了统计和相关性分析,结果表明波群的高度特征和长度特征之间相关性较弱。在此基础上根据渤海和珠江口两地的波浪观测数据,采用合理的无因次化方式,拟合得到一个适于风浪的波包谱经验公式。该公式同时考虑了群高与群长两方面的因素,只要给出波要素和波群的特征参数便可确定波包谱形,便于应用,根据对实测资料波群参数的分析结果,与俞聿修等人先前建议的波包谱公式相比,该公式中给出了更合理的参数取值原则。

Statistics and correlation analysis of the main characteristic parameters to describe wave groupiness was done based on the field wave data.The results show that the wave group height and group length are not strongly correlated to each other.Then ,the wave envelope spectra of the measured sea waves at the mouth of the Zhujiang River and in the Bohai Sea were normalized reasonably,and an empirical wave envelope spectrum suitable for wind waves was obtained by fitting,in which both the wave group height and group length were considered.The empirical wave envelope spectrum here could be determined from the wave parameters and wave groupiness factors.And compared with the previous formula proposed by YU Yu-xiu and the others,more reasonable parameter selection principle was given,according to the analysis results of the wave group characteristics for the measured sea waves.