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为了探讨海底地形对旋转潮波系统的影响,本文对不同底形情况下的潮波运动进行了数值试验。根据试验结果绘制了同潮图并作了讨论。其结论是:(1)对无潮点相对于矩形海域中轴线的偏移来说,摩擦的影响和海底地形的影响可能都是重要的。如果是浅水区域,这种偏移主要是由摩擦引起的,但对平均水深较深、海底在横方向上有坡度的水域来说,底形效应是导致无潮点偏移的主要因素;(2)海底摩擦仅能使无潮点偏移到中轴线的左方(如果人们面向湾顶),而底形则可能使无潮点偏移到中轴线的左方或者中轴线的右方,这将取决于海底横向倾斜的方向。
In order to investigate the influence of seafloor topography on the rotational tidal wave system, numerical experiments of tidal wave motion under different bottom shapes are carried out. According to the test results, the same tide chart is drawn and discussed. The conclusions are: (1) For the shift of the tide-free point from the axis of the rectangular sea, the effect of friction and the influence of the seafloor topography may both be important. In the case of shallow water, this offset is mainly caused by friction, but for deep average water depths and sloping seabed in the seabed, the underfloor effect is the main factor leading to no tidal offset; 2) Submarine friction can only shift the tide-free point to the left of the central axis (if one faces the top of the bay), while the bottom shape may shift the tide-free point to the left of the central axis or to the right of the central axis, This will depend on the direction of the horizontal submarine tilt.