首页|Comparative study of the hydrodynamic performance of weir-type caisson breakwaters under regular waves
Comparative study of the hydrodynamic performance of weir-type caisson breakwaters under regular waves
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NETL
NSTL
Elsevier
The caisson breakwater, known for its outstanding hydraulic performance and structural stability, has become an important coastal protection structure. The present work introduces a weir-type caisson breakwater, which features efficient energy dissipation mechanisms that can significantly enhance the utilisation of marine space. Physical model tests were conducted to evaluate and compare the hydraulic performances and wave pressure distribution of two types of weir-type caisson breakwater, impermeable and permeable, under a wide range of regular wave conditions. Notably, the free exchange of seawater between the seaward and landward sides is achieved by the perforated rear wall of the permeable structure, with three typical porosity levels. The results indicate that both types of structures exhibit excellent hydraulic efficiency in wave reflection, transmission and energy dissipation, and the permeable structure with a rear wall porosity of 20% is particularly pronounced. The different processes of wave-structure interaction lead to more improved wave pressure and wave force characteristics on the permeable structure's rear wall. Furthermore, both types of structures can be optimised under the same design parameter (B/L of approximately 0.190) based on wave properties. The findings obtained from this study have the potential to further promote the design and application of novel breakwaters.
Weir-type caisson breakwaterPhysical model testsWave energy dissipationPressure distributionWave forceREFLECTIONFORCES
NETL
NSTL
Elsevier
