斜向入反射波分离的数值模拟研究

Numerical Simulation Research on Separating the Oblique Incident and Renflected Waves

改进了Ｇｏｄａ分离单向入反射波频谱的方法．给出的新方法可应用于斜向入反射波的分离，且测波仪器对的方向可按任意角度布置。当两测点在入射波方向上的投影距离为入射波半波长的倍数时，该方法会出现奇异问题。建议取两测点在入射波方向上投影距离为峰频波长的０．０５～０．４５倍，这时可得到较好的结果．文中采用数值模拟的方法对模拟波列进行了分离，分离出的波谱与输入的靶谱基本一致，通过分离出的入反射波频谱计算出的各波面过程与输入的各过程线也基本相近，并能较准确地给出结构的反射系数，由此说明该方法是可靠的。

The study presents the modified Mr. Godas method of separating unidirectional irregular incident and reflected waves. The proposed method can be used to separate the oblique incident wave and reflected wave in which the two gauges can be placed in any direction in front of a structure. When the projecting distances of two gauges on the incident wave direction equal half of the incident wave lengths or time it, there will be a singular problem. To avoid the problem, it is suggested that, when the projecting distances of two gauges in the incident wave direction are 0.05 ~0.45 times the lengths of the. peak frequency wave, you will have good results. The paper has separated simulating wave elevations with the numerical and. physical simulating method. The separated frequency spectrum of incident wave quite accords with the target spectrum. So the modified method is reliable.