本文对半潜式平台运动的理论预报方法进行了研究。在国内外现有方法的基础上,从势流理论出发,应用切片理论和相当线性粘性阻尼的假定,计及自由表面、水深、粘性和沉体单元体间的干扰影响,导出了半潜式平台运动方程式及水动力和波浪扰动力计算式。对运动方程采用了考虑运动对粘性影响的迭代解法。本方法已编制成电算程序,计算结果与试验值比较,两者吻合程度令人满意。 In this paper, the theoretical prediction methods of semi-submersible platform motion are studied. Based on the existing methods at home and abroad, the hypothesis of slicing theory and considerable linear viscous damping was used to calculate the influence of free surface, water depth, viscosity and the interference between sink units based on the potential flow theory. Platform equations of motion and formulas for calculating hydrodynamic and wave disturbances. Iterative solution to the equation of motion considering the effects of motion on viscosity is used. The method has been compiled into a computer program, the calculated results compared with the experimental value, the degree of agreement between the two is satisfactory.