Proposals for Design Methodologies for Ice Class Propellers

This paper describes proposals for design methodologies for ice class propellers. The design rationale for these proposals uses limit state analysis. To date, the methods are tentative as they form proposals for standards. The proposals include both steady and unsteady loading components arising from ice and hydrodynamic loads and the structural response in the form of direct stresses, fatigue loadings and existing residual stresses. Exceptional loads arising from impact loads of ice on stopped blades are also considered as a separate limit state.