Effects of high-order nonlinear interactions on unidirectional wave trains
Effects of high-order nonlinear interactions on unidirectional wave trains
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DOI：
10.1016/s0029-8018(01)00074-9
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发表时间：
2002-08
影响因子：
5
通讯作者：
N. Mori;T. Yasuda
中科院分区：
文献类型：
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作者：
N. Mori;T. Yasuda
采用伪谱法对二维高阶非线性重力波进行了数值模拟。深水随机波中三阶以上的高阶非线性激发出明显的傅立叶能量混沌演化。高阶非线性增加了深水的峰度、波高分布和Hmax/ h1 /3，降低了浅水的这些统计量。此外，它们可以在深水中产生具有突出波峰高度的单一极高波浪。高阶非线性（三阶以上）可以看作是引起深水异常波的原因之一。
Numerical simulations of gravity waves with high-order nonlinearities in two-dimensional domain are performed by using the pseudo spectral method. High-order nonlinearities more than third order excite apparently chaotic evolutions of the Fourier energy in deep water random waves. The high-order nonlinearities increase kurtosis, wave height distribution and Hmax/H1/3in deep water and decrease these wave statistics in shallow water. Moreover, they can generate a single extreme high wave with an outstanding crest height in deep water. High-order nonlinearities (more than third order) can be regarded as one cause of freak waves in deep water.