Experimental Study on the Performance of Twin Plate Breakwater

• Published in: China ocean engineering Vol. 25; no. 4; pp. 645 - 656
• Main Author: 郭传胜 张宁川 李艳阳 李靖波 房卓 崔成
• Format: Journal Article
• Language: English
• Published: Heidelberg Chinese Ocean Engineering Society 01.12.2011; State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
• Subjects: Breakwalls; Breakwaters; China; Coastal Sciences; Coefficients; Dynamic pressure; Dynamics; Engineering; Fluid- and Aerodynamics; Marine; Marine & Freshwater Sciences; Numerical and Computational Physics; Oceanography; Offshore Engineering; Plates (structural members); Simulation; Transducers; 传输特性; 压力传感器; 实验; 性能; 板宽; 淹没深度; 空间分布; 防波堤; twin plate; vertical wave force; wave pressure; transmission coefficient; relative submergence
• ISSN: 0890-5487; 2191-8945
• DOI: 10.1007/s13344-011-0051-4

The wave transmission characteristics and wave induced pressures on twin plate breakwater are investigated experimentally in regular and random waves. A total of twenty pressure transducers are fixed on four surfaces of twin plate to measure the wave induced dynamic pressures. The spatial distribution of dynamic wave pressure is given along the surface of the twin plate. The uplift wave force obtained by integrating the hydrodynamic pressure along the structure is presented. Discussed are the influence of different incident wave parameters including the relative plate width B/L, relative wave height Hi / a and relative submergence depth s / a on the non-dimensional dynamic wave pressures and total wave forces. From the investigation, it is found that the optimum transmission coefficient, Kt occurs around B/L = 0.41 - 0.43, and the twin plate breakwater is more effective in different water depths. The maximum of pressure ratio decreases from 1.8 to 1.1 when the relative submergence depth of top plate is increased from -0.8 to ＋0.8.