Study on the Breakwater Caisson as Oscillating Water Column Facility

• Published in: Journal of Ocean University of China Vol. 9; no. 3; pp. 244 - 250
• Main Authors: Huang, Yan, Shi, Hongda, Liu, Defu, Liu, Zhen
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science Press 01.09.2010; Springer Nature B.V; Disaster Prevention Research Institute,Ocean University of China,Qingdao 266003,P.R. China; Department of Ocean Engineering,College of Engineering,Ocean University of China,Qingdao 266100,P.R. China; Key Laboratory of Ocean Engineering of Shandong Province,Qingdao 266100,P.R. China%Department of Ocean Engineering,College of Engineering,Ocean University of China,Qingdao 266100,P.R. China
• Subjects: Breakwaters; Earth and Environmental Science; Earth Sciences; Geotechnology; Marine; Meteorology; Ocean engineering; Oceanography; Potential flow; Water column; Wave energy; Wave power; 几何结构; 开孔沉箱; 振荡水柱; 结构可靠性分析; 能量转换器; 计算结果; 防波堤; OWC; horizontal wave force; perforated caisson breakwater; reliability analysis; wave energy; ISP method
• ISSN: 1672-5182; 1993-5021; 1672-5174
• DOI: 10.1007/s11802-010-1720-2

The Oscillating Water Column （OWC） wave energy convertor with the advantage of its simple geometrical construction and excellent stability is widely employed. Recently, perforated breakwaters have been often used as they can effectively reduce the wave reflection from and wave forces acting on the structures. Considering the similarity between the compartment of perforated caisson and the air chamber of OWC wave energy convertor, a new perforated Caisson of breakwater is designed in this paper. The ordinary caisson is modified by installing facilities similar to the air chamber of OWC converter, but here they are utilized to dissipate the wave energy inside the caisson. Such an arrangement improves the stability of the caisson and reduces the construction cost by using the compartment of perforated caisson like using an air chamber. This innovation has both academic significance and important engineering value. For a new type of caisson, reliability analysis of the structure is necessary. Linear potential flow theory is applied to calculate the horizontal wave force acting on the caisson. The calculated results are compared with experimental data, showing the feasibility of the method. The Importance Sampling Procedure （ISP） is used to analyse the reliability of this caisson breakwater.