A numerical study on interaction of focused waves with fixed cylinder by a hybrid model coupling SPH and QALE-FEM

摘要

Cylinder structures are the common types of installations in coastal andoffshore engineering. Thus it is of high importance to study the waveinteraction with moving cylinder structures. In this paper, a 3-D hybridmodel based on the smoothed particle hydrodynamics (SPH) and theQuasi Arbitrary Langangian-Eulerian Finite Element Method (QALEFEM)is used to study the interaction of focused waves with fixed andmoving cylinder. The hybrid model has advantages in simulating thefocused waves and cylinder interactions in terms of accuracy andefficiency by making use of respective advantage of the abovementionedtwo methods. In this hybrid model, the SPH method is usedin the near-field interaction between the focused waves and cylinderand the QALE-FEM method is adopted for the wave generation at theSPH boundaries. In order to understand the true predictive capability ofthe numerical model, the simulation results are validated against with aset of experimental data, including the wavemaker motion, waveelevations near the cylinder and wave pressure on the cylinder.