长周期波作用下防波堤透浪对港内系泊稳定影响分析

Analysis of influence of long-period transmitted wave through breakwater on mooring stability in the harbor

抛石斜坡堤是港口工程中防波堤最常见的结构型式之一,其由孔隙率较大的堤心石及护面结构组成,波浪遇到防波堤后,部分波能量可能透过防波堤产生透射波浪,进而影响港内泊稳条件,当波周期较长时尤为明显,分析透射波浪对港内系泊稳定条件的影响是设计中必须考虑的关键问题之一。结合境外某工程实例,在充分分析工程区自然条件的基础上,利用系泊数值分析软件,定量分析了透射波浪对港内系泊稳定条件的影响,结果表明透射波浪将在一定程度上影响泊位可作业天数。

The rip-rap breakwater is one of the most common structure types of breakwater in harbor projects,which is composed of core stones and armor blocks with large porosities. When waves work on a rip-rap breakwater,part of wave energy may transmit through the breakwater and generate transmitted waves,which will affect the mooring stability in the harbor. This situation will be particularly significant when the incoming waves have a long period. The analysis of the influence of transmitted waves on the mooring stability in the harbor is one of the key issues that must be considered in design. In this paper,based on a practical project,the natural conditions of the project were analyzed,and the mooring numerical analysis software was used to analyze the influence of the transmitted waves on the mooring stability in the harbor. The result shows that the transmitted waves can affect the number of workable days of berth.