双层开孔斜挡板透空式防波堤消浪性能研究

针对一种新型双层开孔斜挡板透空式防波堤消浪性能问题,研究挡板开孔率和挡板倾斜角度对防波堤消浪性能的影响。采用物理模型试验方法,得出其反射和透射系数、波能分布和堤后波幅频谱特征结果。结果表明,斜挡板开孔率越大,防波堤透射系数也越大,但在试验范围内,透射系数均小于0. 5;该类型防波堤对波浪有较好的消能性,对较长周期波以反射为主,较短周期波以消浪室消能为主,整体透射系数较短周期波略大;防波堤设计斜挡板比平挡板透射系数小,具有更好的消浪性能,最小透浪仅为后者的39%。

Study on wave dissipation performance of permeable breakwater of double porous inclined baffle

Aiming at the problem of wave dissipation performance of a new type of permeable breakwater of double porous inclined baffle,we study the influence of the baffle opening ratio and the baffle angle on the wave dissipation performance of the breakwater.Through the physical model test,we obtain the results of the reflection and transmittance coefficients,wave energy distribution and spectrum characteristics of wave amplitude behind the breakwater.The results show that the larger the opening rate of the inclined baffle is,the larger the transmittance coefficient of breakwater will be.Within the test range,the transmittance coefficients are all less than 0.5.This type of breakwater has better energy dissipation for waves,it is mainly reflecting for long period wave,it is mainly dissipating by wave-absorbing chambers for short period wave,and the overall transmittance coefficient for short period wave is slightly larger.In addition,the design of the inclined baffle of the breakwater has a smaller transmittance coefficient than the flat baffle,it has better wave dissipation performance,and the minimum transmittance coefficient is only 39% of the latter.