Ship speed energy-saving optimization auxiliary method

The invention discloses a ship speed energy-saving optimization auxiliary method. The method comprises the steps of equally dividing whole voyages according to steering points and voyages; obtainingship rotating speed and completion time of each branch navigation segment through an optimization algorithm on the premise of safely completing the voyage number task and the lowest oil consumption; repeating the same equal division on each sub-navigation segment of the previous stage, and calculating the ship rotating speed and the completion time of each sub-navigation segment of the next stageagain; and obtaining the optimized rotating speed of the main engine of each branch navigation segment of the last stage under the current condition until the distance of the equally divided navigation segments is shortened to the voyage within one day. According to the invention, voyage plans, the navigation area wind wave flow condition and the ship navigation performance can be comprehensivelyconsidered; the optimal ener