A systematic analysis on all the theoretical or applicableresearch results has been conducted in this field at home and abroad. For the purpose of correctness and practicalness, the Green formula is applied to ship floating calculation as regard to the critical problem as how to calculate the coordinates of the inter section point and all the geometric principles of under-water hull or the immersed compartment. And then the method of floating condition by means of Newton it eration for resolution of the floating equilibrium equations is discussed in detail. The program has been developed accordingly by importing the new technologies in computer science. At last, it can be seen that the new approach is a short -cut method that is very advanced and practicable by the given examples of calculation of ship floating, so it can be offered to the practical use to calculate damage floatation and stability in ship design.%在船舶不沉性理论的基础上,叙述了船体计算坐标系和浮态参数的选取、角坐标变换、破损船舶浮态计算的数学模型和水线下船体要素的定义.在倾斜水线与船体表面求交点时,采用坐标转换方法,并应用Green公式计算船体水线下和淹水舱的有效要素;简化了计算方法,提高了利用Newton迭代法求解浮态平衡方程的收敛性和精确性,同时也方便了计算机软件的编程.通过对实船的设计结果分析,证明了该方法的先进性和工程实用性.
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