The corrective smoothed particle hydrodynamics(CSPH)method,based on Taylor series expansion,and the Riemann solver have been employed to improve the smoothed particle hydrodynamics(SPH)method.This enhanced method was used to simulate the interaction between waves and a top plate perforated caisson with a double wave-absorbing chamber.The accuracy and applicability of the numerical method were validated by comparing it with experimental data.The study analyzed the impact of the top plate height s,chamber width B,and perforated ratio μ on the wave surface η and horizontal wave pressure p near the caisson.The results indicated that,under the given wave conditions,the top plate height s and perforated ratio μ are the primary factors affecting the peak value of the wave surface around the caisson,while the chamber width B has a minor effect on the wave surface peak.Additionally,with an increase in the top plate height s,the wave pressure peak at the front perforated plate and the rear solid wall at the still water level gradually decreases,while the wave pressure peak at the rear perforated plate first decreases and then increases.Moreover,the improved SPH method can also be used to study the pressure and velocity fields of water particles,track the instantaneous velocity of water particles at different positions and times,and describe the motion state of water particles.This provides an effective means for studying the interaction between waves and perforated caissons.
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