Study on harbor berthing based on numerical simulation of Boussinesq wave

摘要

Nearshore wave model was established based on the enhanced Boussinesq equations, which were dispersed into orthogonal grids on spatial distribution and solved using alternating direction implicit (ADI) algorithm. There are three kind of boundary conditions which are absorbing boundary, reflecting boundary and wave-generating boundary in the model, while the wave on open boundary was driven by the varying flux along the wave-generating line. Specifically, L=100m, Hs=3m, T=8s, Depth=12m. The main effects of the porosity were introduced by additional laminar and turbulent friction terms for describing losses due to the flow through a porous structure. The sponge (or absorbing) layers have been used as the efficient numerical wave absorbers in the wave simulations. These can be set up along the model boundaries to provide radiation boundary conditions, which absorbed the wave energy propagating out of the model area. This model can generate the regular wave and multi-directional random wave. The JONSWAP wave frequency spectrum and direction distribution frequency independent were employed, and the wave distribution through the breakwater gap has been simulated. Based on the good comparison between the numerical results and the ones in specification Code of Hydrology for Sea Harbor, the berthing conditions of harbor have been simulated well.