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۱Wave Pressures on the Crown Deck of Upright Breakwaters
نویسنده(ها): ، ،
اطلاعات انتشار: چهارمین کنفرانس بین المللی سواحل و بنادر و سازه های دریایی، سال
تعداد صفحات: ۱۲
The loadings generated by the collapse of an overtopping discharge onto the horizontal top surface of vertical breakwaters is not well–addressed in the literature. The prediction of these loadings gains greater importance with the trends of reducing the crest freeboard and of using the crown deck for industrial or recreational purposes.Two–dimensional hydraulic model tests were carried out in a wave flume equipped to generate and absorb irregular waves. The experimental programme was designed to explore the effect of the principal geometrical and hydraulic parameters: significant wave height Hsi, peak period Tp, water depth at the toe of the wall d, seabed slope and crest freeboard Rc. The water pressures over the crown deck were measured using six transducers. An additional transducer was placed in the front wall at the still water level. Video records were used to measure the height and the velocity of the overtopping jet, the falling distance, and wave gauges used to measure the transmitted wave behind the structure.From a parametric analysis of the test results, simple design indications are provided for the preliminary analysis of the stability of structures on the breakwater crest.<\div>

۲HYDRAULIC AND NUMERICAL MODELING OF THE PERFORMANCE OF –TYPE FLOATING BREAKWATERS
اطلاعات انتشار: دهمین همایش بین المللی سواحل، بنادر و سازه های دریایی، سال
تعداد صفحات: ۱۲
This paper gives details of the refinement of a two–dimensional numerical model for the computation of the floating breakwater (FB) response, allowed to oscillate only in heave. Thenumerical model results are validated and verified against laboratory tests. The model is based on the hypotheses of inviscid fluid and irrotational flow; linearized boundary conditions are applied at the free surface and at the object boundaries. The equations are solved using theFinite Element Method, allowing detailed description of complicated shapes of the object and bottom boundary. The resulting model is computationally efficient and economic. Validation iscarried out using the results of a small scale experiments on a P type loating Breakwater. Additionally, a comparison between numerical results and a new empirical formula is presented. Despite of the simplifications of the model equations, the numerical results satisfactorily agree with the experimental ones. The model appears suitable for the preliminary design of Floating Breakwaters<\div>
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