Author(s): Bruno Chilo’; Stefano Corsini; Camillo Missio; Franco Trave
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Keywords: No Keywords
Abstract: The paper presents the results of a theoretical and experimental work, jointly performed by ESTRAMED and TECNOMARE on behalf of CONSORZIO VENEZIA NUOVA, regarding studies for prevention of high water level conditions in the Venice Lagoon. The study concerns a direct comparison between theoretical and experimental results relevant to the hydrodynamic coefficients of radiation of an array of mobile tanks similar to those that will form the defensive barriers. The theoretical values of the radiation coefficients have been calculated by using a boundary elements program based on linear potential flow theory. The experimental tests were performed in a flume reproducing the theoretical conditions adopted for the calculation. Different parameters were measured: angular position, level differences between the front and rear basin and motion frequency; the armonic motion of one of the tanks was generated with a servo controlled actuator and the hydrodynamic moments on all the elements of the reproduced section of the barrier were measured. The results of the study enphasize the good agreement between the two approaches and in general they demonstrate that a dynamic simulation model of the mobile barrier, theoretical or experimental, could provide a good representation of the hydrodynamic phenomena. As general consequence the study demonstrates the possibility to reliably simulate a non-linear behaviour by using a step-by-step evaluation of hydrodynamic forces based on linear potential theory. The coordinated employment of mathematical methodologies and physical modelling allowed to obtain the best results in the development of useful design instruments.
Year: 1991