Analysis of orthogonal wave reflection by a caisson with open front chamber filled with sloping rubble mound |
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| Institution: | 1. Shandong Provincial Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao 266100, China;2. Department of Civil and Environmental Engineering, Computer Science, Constructions and Applied Mathematics (D.I.C.I.E.A.M.A.), University of Messina, C. da di Dio, 98166 S. Agata, Messina, Italy;1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China;2. Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark;1. Depart. of Civil and Environ. Eng., Louisiana State Univ., Baton Rouge, LA, USA;2. Center for Computation and Tech., Louisiana State University, Baton Rouge, LA, USA;3. Depart. of Mathematics, Louisiana State University, Baton Rouge, LA, USA;1. Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea;2. Department of Civil and Environmental Engineering & Integrated Research Institute of Construction and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea |
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| Abstract: | A new combined caisson, including an open window on the front wall and an internal rubble mound with a slope, has been proposed and used in Italy. This study presents a semi-analytical solution to estimate the wave absorbing performance of the new combined caisson with regard to orthogonal wave attack. The internal slope of the rubble mound is assumed to be a series of horizontal steps. Then the matched eigenfunction expansions are used to develop the semi-analytical solution. The square-root singularity of fluid velocity at the upper tip of the front submerged wall is incorporated into the solution to enhance the convergence of calculated results. The new semi-analytical solution is confirmed by an independently developed multi-domain boundary element method solution. Also the predictions of the semi-analytical solution agree reasonably well with experimental data. Based on both the calculations and the experimental data, some useful results are presented for practical engineering. |
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