论文部分内容阅读
在海浪研究中,非线性能量传输Snl的概念虽早在60年代提出,但其重要性直至JONSWAP研究成果发表以后才得到证实.某些特征谱的非线性能量传输的数值计算结果,定性地描述了非线性能量传输Snl的主要特征:(1)由给定谱可得到非线性能量传输Snl的理论值.(2)非线性能量传输Snl有三个耳,两侧为正耳,中间为负耳;对充分成长的PM谱,低频正耳位于峰频率,对成长的JONSWAP谱,低频正耳位于峰频率左侧.(3)高频正耳较其它二个耳有较宽的方向分布.(4)低频正耳集中在窄的频带内,有比较窄的方向分布.(5)相互作用发生在波数空间的一个比较短的范围内,最强的能量传输速率相
Although the concept of nonlinear energy transfer Snl was proposed as early as the 1960s in wave research, its importance was not confirmed until the publication of the JONSWAP study.Numerical results of the nonlinear energy transfer for some characteristic spectra are qualitatively described The main characteristics of Snl nonlinear energy transfer: (1) from the given spectrum can be obtained nonlinear energy transfer Snl theoretical value. (2) nonlinear energy transfer Snl has three ears, both sides of the ears, the middle ear ; For the fully grown PM spectrum, the low frequency positive ear is at the peak frequency, the JONSWAP spectrum is growing, and the low frequency positive ear is at the left side of the peak frequency. (3) The high frequency auricles have a wider directional distribution than the other two ears. 4) The low frequencies are centered in a narrow frequency band and have a narrower directional distribution. (5) The interaction takes place in a relatively short range of the wavenumber space. The strongest energy transfer rate