A deterministic combination of numerical and physical model for nonlinear wave propagation

Abstract

By means of the established deterministic combination of numerical and physical model for nonlinear wave propagation, the adaptability of regular and irregular wave propagation are verified under the condition of nonlinear strength and different water depth.In the combined model, a triangular finite element model based on modified Boussinesq equations is applied for wave computation, and a 2D piston-type wavemeker and the associated control system is adopted in physical wave generation. It is shown from various simulation and experiment results of wave propagation that the results at the boundary between numerical and physical model, whether regular or irregular wave, match extremely very well. The combined model is effective for establishing the deterministic combination with numerical and physical model. Furthermore, the conclusion that the nonlinear error of the combined model increases with the increase of relative water depth can be easily drawn, according to the analysis of the simulation error trend.