大连大窑湾港湾振荡数值模拟研究

采用Boussinesq数值波浪模型,模拟得到大窑湾不同水域的固有频率。模拟了不规则波入射时全湾水面响应状况,结果表明:谱峰周期较小的不规则波入射大窑湾港内,经过一定长的时间,波能会在局部地区发生高频到低频的传递,从而诱发局部低频波动。外海波浪入射不会导致全湾水域整体振荡,但湾底及南岸小港池易发生局部水体振荡。采用减小边界反射系数的措施,可有效降低局部水域的波动幅度。

Numerical simulation on harbor resonance in Dayaowan harbor of Dalian

The natural frequencies of different areas in Dayaowan harbor are obtained by the Boussinesq numerical wave model.Simulating the surface responses of the whole water to incident irregular waves,we get the results that a small spectrum peak period of irregular wave can induce local low frequency fluctuations after a certain time by wave energy transfers from high frequency to the lower in the local areas of Dayaowan harbor.The incident of the waves can only stimulate the local water resonances such as in the bottom of the harbor and in the small harbor in the south bank,but not in the whole harbor.It is effective to reduce fluctuations in local waters with the measure for decreasing the reflection coefficient of the borders.