N波诱发的瞬变港湾振荡的数值研究

发布时间：2018-03-24 20:29

本文选题：海岸工程　切入点：港湾振荡　出处：《哈尔滨工程大学学报》2017年08期

【摘要】：为了研究海啸波诱发的瞬变港湾振荡问题,本文采用一组完全非线性Boussinesq模型,模拟了由波峰在前和波谷在前的两种类型的等边N波入射诱发的狭长矩形港内的瞬变港湾振荡现象。基于正交模态分解法,定量分离了港内不同共振模态的响应幅值,并系统研究了入射N波类型和入射波波幅对港内相对波能分布的影响。研究表明:在本文所研究的特定港口和入射波波幅范围内,当入射波波幅较小时,以上两种类型N波诱发的港内相对波能分布几乎完全相同,并且波能几乎都集中在最低的几个共振模态上。随着入射波波幅的增大,分布于更高模态上的波能的比重增加,港内波能的分布趋于均匀,并且占有最大波能的共振模态逐渐由较低的模态向较高的模态转移。相比于波峰在前的等边N波,波谷在前的等边N波诱发的港内波能分布得更加均匀。
[Abstract]:In order to study the transient harbour oscillation induced by tsunami wave, a set of completely nonlinear Boussinesq models are used in this paper. The transient harbour oscillation in a long and narrow rectangular port induced by two types of equilateral N waves with peak in front and front of trough is simulated. Based on the orthogonal mode decomposition method, the response amplitudes of different resonant modes in the harbour are quantitatively separated. The influence of the type of incident N wave and the amplitude of incident wave on the distribution of relative wave energy in port is studied systematically. The results show that in the specific port and the range of incident wave amplitude studied in this paper, when the incident wave amplitude is small, The distribution of the relative wave energy in the harbour induced by the above two types of N waves is almost identical, and the wave energy is almost concentrated in the lowest resonance modes. With the increase of the amplitude of the incident wave, the proportion of the wave energy distributed in the higher modes increases. The distribution of wave energy in the port tends to be uniform, and the resonance mode which occupies the maximum wave energy gradually shifts from the lower mode to the higher mode, compared with the equilateral N wave in front of the wave peak, The distribution of wave energy in port induced by N wave in front equilateral is more uniform.
【作者单位】：江苏科技大学船舶与海洋工程学院;江苏科技大学江苏省船舶先进设计制造技术重点实验室;大连理工大学船舶工程学院;
【基金】：国家自然科学基金项目(51609108) 江苏科技大学江苏省船舶先进设计制造技术重点实验室开放研究基金项目(CJ1504)
【分类号】：U652.3

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