Ensuring the main electric engine operability and pyramidal strength of the propulsion system of ice ships
Nowadays an intensification of interest, and use, of arctic waters for shipping as well as a high demand for ice ships is widely observed. Modern ice ships projects (e.g. double-acting ships) go beyond previous operational and design experience significantly. Therefore, the improvement of calculation methods needs to be developed. Azimuth thruster propellers on DAS have to meet the demanding operating environments. Propeller strength and operability of the propulsion complex mainly influence the operational effectiveness of the modern icebreakers and ice ships. Deep analysis of past investigations devoted to propeller/ice interaction was fulfilled. It gives an opportunity to highlight the main factors determining the efficiency of ice propellers and to develop the advanced methods of propeller strength calculation. Modern operating experience as well as the refined methodologies are used to develop efficient ice propellers with high strength characteristics. The refined methods have been developed to assign and regulate ice loads for propulsion complexes design to calculate and reduce the damage force of the propeller blade and to ensure pyramid strength