Calculation method for calculating secondary partial tide experience cotidal chart based on relative admittance
A secondary and empirical technique, applied in the field of calculation of secondary tidal division empirical tidal maps based on relative admittance, can solve problems such as large errors in tidal maps
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[0064] The present invention will be described in detail below in conjunction with specific embodiments.
[0065] The present invention provides a calculation method based on relative admittance to calculate the secondary tidal empirical co-tide diagram, including the following calculation steps:
[0066] Step S1, for a certain main tidal current n, the admittance An is:
[0067]
[0068] in h n and g n are the corrected amplitude, amplitude and delay angle of the main tide, respectively, C n is the coefficient of tidal force (see Chen Zongyong, 1980 [25] ; Fang Guohong et al., 1986 [26] , Huang Zuke, Huang Lei, 2005 [27] );
[0069] Step S2, in the same tidal group, define the relative admittance of the minor tidal m relative to the major tidal n as:
[0070]
[0071] in,
[0072]
[0073] r m / n =g m -g n (4)
[0074] H in formula (3) m / H n is the amplitude ratio in traditional tidal science, g m -g n is the lag angle difference; if the amplitude ...
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