改善进港航道引起港内波能聚集问题的研究

Research on improvement of convergence of wave energy caused by entrance channel

进港航道在口门引起波能聚集,对港内泊稳条件产生不利影响,采用适当工程措施可使该情况有所改善。文中结合某工程实例探讨了包括增加防波堤、清除浅滩和调整航道轴线的三种工程方案,并通过基于Boussinesq方程的波浪数学模型进行了对比试验,结果表明各方案均能达到缓解波能聚集、改善泊稳条件的目的,但改善效果存在一定差异。最后还对试验中采用单方向和多方向波的结果进行了初步对比探讨,对于航道波能聚集影响港内波况的问题,采用单方向不规则波的试验结果将偏于危险。

Convergence of wave energy at the entrance caused by channel has some negative impact on the wave conditions in a harbor. The advisable engineering method can improve the condition of berth. Three engineering projects including adding additional breakwater, shallow bottomland dredging and changing channel axial line in a certain engineering case are discussed in this paper. Experimental comparison of a wave numerical model based on Boussinesq quation is carried out. The results show that all the methods can decrease the convergence of wave energy and improve the condition of berth. Only some difference exists in the above methods. Finally, comparison between multi - direction irregular wave and single - direction irregular wave is given to discuss the problem of wave energy concentration. According to the comparison, single- direction irregular wave could lead to danger.