Nonlinear simulations of wave-induced motions of a freely floating body using WCSPH method |
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Institution: | 1. Dipartimento di Ingegneria Civile, Università della Calabria, via Bucci, cubo 42B, 87036 Arcavacata di Rende, CS, Italy;2. Facoltà di Ingegneria, Università degli Studi eCampus, via Isimbardi 10, 22060 Novedrate, CO, Italy;1. The State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;2. School of Engineering, Physics and Mathematics, University of Dundee, DD1 4HN, United Kingdom |
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Abstract: | Nonlinear interactions between waves and floating bodies are investigated using the weakly compressible Smoothed Particle Hydrodynamic (WCSPH) method. An improved algorithm based on the dynamic boundary particles (DBPs) is proposed to treat the moving boundary of the floating body. The force exerted on the floating body boundary particle by the particles surrounding it is evaluated using the volume integration of the stress tensors obtained from the momentum equation in its compact support. The improved WCSPH model is validated by the experimental results. The numerical test cases of the vertical oscillation of a rectangular box, the damped rolling oscillation of a floating box and the wave forces on a fixed rectangular box are then carried out to demonstrate the performance of the proposed model. Finally the evolution in time of the dynamic response of the freely floating body under nonlinear waves are discussed and compared with experimental results. |
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Keywords: | SPH Floating body Fluid body interaction Nonlinear wave |
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