分段式造波机生成波浪内外部结构的一致性分析

用60个波高仪组成2m×2m的方阵,同步测量波面过程,用Doppler声学流速仪获得了二维正向和斜向规则波、二维正向和斜向随机波以及三维随机波浪场中不同水深处的同步Euler水质点速度各方向分量的高精度的时间过程资料.以此为出发点,讨论了分段式造波机生成波浪的周期分布特征,发现三维随机波浪周期分布的μ值与二维随机波浪比较有明显增大的趋势.分别从速度合矢量方向与波向的吻合程度(对二维波浪)、"多点波面"组合与"波面-水质点速度"组合两种方式得到方向谱的吻合程度(对三维随机波浪)等不同角度,论证了分段式造波机产生的波浪的内外部结构的一致性.

Consistency analysis of inner and outer wave structures in 3-D random waves

By using an arra y of 6 0 wave transmitters, systematic examinat i ons are made of the distribution of the period of the waves generated by a secti on al wave generator.By means of an Acousti c Doppler Velocimeter(ADV), the time history of v e locity of water partcles at different po sitions is measured simultaneously w ith the wave elevation in the Eular coor dinate s ystem for two dimensional regular and ir regular waves with different incident an gles, and three dimensional random waves . The directional wave spectra are obtaine d by the self combination of wave elevat i ons, and the cross combination of wave e l evation and velocity of water particles r espectively. Based on the experimental r e sults, for inclined incident waves and 3 - D random waves, it is found that the con s istency exists between the inner and out er wave structures.This finding removes the long term doubt of some scholars abo ut the non-consistency between the inner and outer structures of inclined waves generated by sectional wave makers.