Three Dimensional Model of Snake-Type Wavemakers using Linear Wave Theory

摘要

This study takes up a topic in wave generation. In a wave tank of hidrodynamic laboratory well known two types of wavemakers, i.e. flap-type and piston type, are used to generate waves. In addition to these two types of wavemakers, there is another type of wavemaker which is the snake-type. Snake-type wavemakers consists of many parts which can move like flaps or pistons. Here, we investigate the propagation of waves generated by the snake-type wavemakers, which is flap type, based on the wave propagation governing equation (Laplace equation). Based on the linear theory we derived a ratio between the stroke maximum of wavemakers (S) and the amplitude (A) of generated waves. It is found that the ratio of S and A does not only depend on frequency of generated wave but also depend on water depth. The formulation for the wavemaker control will also be analyzed and simulated.