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利用建立的一种新的半隐半显三维数值格式，将渤海、黄海、东海作为一个整体，采用球面坐标系下的三维潮波方程组，考虑了引潮力的作用，数值模拟了渤海、黄海、东海的Ｍ２分潮的潮汐与潮流，结果较好地体现了渤海、黄海、东海Ｍ２分潮的特征．通过比较６５个验潮站的实测值与计算值，所得计算结果的振幅差平均为６．４ｃｍ，相角差为６．１°，计算与实测符合良好．本文给出的问潮图与Ｆａｎｇ于１９８６年给出的实测占数值综合结果基本一致．对选取的４７个测流站，比较了各层潮流调和常数Ｕｃｏｓζ、Ｕｓｉｎζ、Ｖｃｏｓζ、Ｖｓｉｎη的计算值与实测值的偏差，偏差绝对值的平均在２．６～４．９ｃｍ／ｓ之间．并比较分析了潮流的垂直结构，所得结果与实测符合较好．首次揭示出回流点的水平位置不随深度变化这一特性．最后给出了Ｍ２分潮的潮能消耗．
By using a new semi-implicit semi-explicit three-dimensional numerical scheme, taking the Bohai Sea, the Yellow Sea and the East China Sea as a whole, the three-dimensional tidal wave equations in the spherical coordinate system are taken into account. The tidal force is taken into account. , Tide and tidal current of M2 tide in the East China Sea. The results better reflect the characteristics of M2 tide in the Bohai Sea, the Yellow Sea and the East China Sea. By comparing the measured values and calculated values of 65 tide gauge stations, the calculated amplitude difference is 6.4 cm and the phase difference is 6.1 °, which is in good agreement with the measured data. The results of this paper are basically the same as those obtained by Fang in 1986. The 47 flow measurement stations were selected to compare the deviation between the calculated and the measured values of the harmonic constants Ucosζ, Usinζ, Vcosζ and Vsinη. The absolute values of the deviations were between 2.6 and 4.9 cm / s. The vertical structure of the tidal current is comparatively analyzed, and the result is in good agreement with the measured data. For the first time revealed the return point of the horizontal position does not change with the depth of this feature. Finally, the tide energy consumption of M2 tide is given.