作　　者： ; ; ; ;

机构地区： 中山大学地理科学与规划学院水资源与环境研究中心

出　　处： 《热带海洋学报》 2003年第6期46-53,共8页

摘　　要： 利用近岸带两个测点的波浪同步观测资料,通过二阶谱分析了三组成波的非线性相互作用。对波谱峰频自相互作用的二阶相干系数b2(fp,fp)及对应的二阶位相值β(fp,fp)、最大二阶谱幅值B最大(f1,f2)和最大二阶相干系数b2最大(f1,f2)的组成波频率分析结果表明:(1)弱频散作用的过渡水深区存在着明显的非共振三组成波耦合作用;(2)包括谱峰频在内的自相互作用是近岸区波耦合作用的重要形式;(3)随着水深减小,趋近碎波带,非线性耦合作用进一步增强,谱能量以向低频转移为主变为向高、低频两侧转移,波形趋于前倾。 This paper analyzes triad non-linear interactions with bispectal estimation by using the synchronous wave observations at two stations in the nearshore area. The results show that the main characteristics of nearshore wave non-linear interactions indicated by b^(2)(f_(p), f_(p)), the bicoherence for self interactions of the spectral peak, and the corresponding biphase β(f_(p), f_(p)), the spectral components of the maximum bispectral magnitudes B_(max)(f_(1),f_(2)) and the maximum bicoherence b^(2)_(max)(f_(1),f_(2)) are as follows: (1) The obvious non-resonant triad coupling exists at this transition water depth of weak dispersion; (2) The self-interactions including spectral peak are the main forms of triad coupling; (3) The non-linear coupling strength increases and waves become increasingly pitched forward as depth decreasing and tending towards surf zone, and wave energyof spectral peak transfers to low and high frequency rather than mainly to low frequency.

关 键 词： 三组成波耦合作用 峰频自相互作用 二阶谱分析 近岸带

领　　域： [天文地球]