The Numerical Simulation Of Nonlinear Wave And Wave Sholing

This paper is based on two dimensions Laplace equation and boundary condition, obtains the integral equation after Green transformation;use 0-1 combined type BEM to establish discrete boundary integral equation with potential function and its normal derivatives as unknown quantity in node;use sub-domain scheme of BEM method to divide the calculate field into certain subfields, then utilize neighboring subfield interface continual condition, establishes gradually solves value relations of each subfield, and then gradually solves linear equations of all of the calculate field. Through circulation iteration with presuppose precision in time step, completes the wave surface tracing computation in time domain, and establishes a strong nonlinear numerical mode to be suitable in the simulation of interaction between wave and the structure.In this paper the model mentioned above is improved on and ameliorated, so the results of simulation on the nonlinear wave are more accurate. And the reflection waves are eliminated by the sponge layer and the radiation codition of Sommerfeld in the numerical tunk. At the same time the wave flowing over a submerged breakwater is simulated with the present model.Finally a study of the breaking of regular waves is carried out on the slope of 1 ) 200. The analysis on the asymmetry of the wave profile about the horizontal axis and the wave crest about vertical axis is carried out basised on the physical test.