The invention relates to the technical field of ship safe harbor-returning power, and discloses a
cruise ship and ro-ro passenger ship safe harbor-returning power
estimation method, which comprises the following steps of: obtaining corresponding sea wave spectrum information in combination with a ship
route and a voyage period; the resistance of the ship is calculated and analyzed, and according to the analysis of resistance components, the resistance borne by the ship can be obtained through the following method: Fasis = fcalm + fwind + fadd + fapped; the
forward speed coefficient of the
propeller is reversely deduced through the load coefficient Ctot of the
propeller, so that the rotating speed of the
propeller is determined, the corresponding thrust of the propeller is obtained through resistance, the load coefficient of the propeller is calculated, the corresponding
forward speed coefficient is obtained through the intersection point of the load coefficient and the
thrust coefficient in the
open water curve, and the corresponding
open water efficiency eta o is obtained. According to the method, the safety harbor-returning power of the ship can be checked and calculated in the initial stage of ship design, the
model selection work of main propulsion equipment such as a main engine is matched, the calculation theory is clear, and the method has good popularization value.