摘要
波群演化有非常特殊的物理现象。模拟这一过程要求模型具有较好的色散性性能同时具有良好的波幅离散性能、非线性性能。采用分层Boussinesq类方程对深水波群得到非线性演化开展数值模拟研究。利用Stansberg(1993)的物理实验验证了分层Boussinesq方程波浪模型在该研究中具有很好的适用性和较高的精度。模型较好地预报了组成波的倍频、和频及差频波浪。越接近造波板,结果吻合的越好。随着长时间的演化,主频部分的组成波的波高数值结果要大于实测结果,高频部分的组成波出现明显差异。
Deep wave evolvement is a very different phenomenon in the nature.Thus,simulating the phenomenon needs the model to have high dispersion and high nonlinear accuracy.Deep wave evolvement is simulated by two-layer,depth-integrated Boussinesq model.The proposed numerical model is examined by comparison with the experimental results which come from Stansberg＇s experiment（1993）.The numerical result shows that the layer,depth-integrated Boussinesq model have good applicability and precision in the simulation of deep wave evolvement.The proposed numerical model predicts well diploid-frequency components,sum-frequency components and difference-frequency components.When it is closer to the wavemaker,the experimental-numerical comparisons become more consistent.With the time developing,wave amplitude in the main frequency is less than those in the physical experiment,the components in the high frequency have obvious differences.
出处
《海洋技术》
北大核心
2010年第4期109-112,共4页
Ocean Technology
基金
海洋公益性行业科研专项(200905002)
