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该文以一组色散关系得到改进的完全非线性Boussinesq方程建立了一个波浪模型,通过与均匀水深条件下聚焦波浪的实验结果进行对比说明该模型可以很好的模拟聚焦波浪,然后应用该模型聚焦波浪在一前后坡度对称的潜堤上的非线性传播变形。结果表明:随着水深的减小波峰越来越尖,波谷越来越平坦,所对应的能谱在高次谐频部分也有较大的增长,但在堤顶部分和反变浅区域,波浪的群性随着水深的增大而越来越不明显,对应的频谱表明在这段区域内有反向能量传递存在。另外,在反变浅区域主波频率附近的自由波能量有所增加,这说明频率的峰度也会减小。
In this paper, we establish a wave model based on a complete nonlinear Boussinesq equation with improved chromatic dispersion. By comparing with the experimental results of the focused wave under uniform water depth, the model can simulate the focusing wave well and then use the model to focus Nonlinear Propagation Deformation of a Wave on a Skewed - symmetrical Submarine. The results show that as the water depth decreases, the wave crests become more and more sharp, the wave trough becomes more and more flat, and the corresponding energy spectrum also increases greatly in the high-order harmonic part. However, The population is less and less obvious as the water depth increases, and the corresponding spectrum shows that there is reverse energy transfer in this area. In addition, there is an increase in the free-wave energy near the main wave frequency in the anti-shallow region, indicating that the kurtosis of the frequency also decreases.