In-Haeng Song

Design of Highly Skewed Propeller considering the Blade Strength

AbstractA strength problem of propeller blades for large container ship s at astern condition has been occasionally reported due to the application of a highly skewed propeller which can reduce the hull surface fluctuation forces. A finite element analysis code for propeller blade was developed and utilized since 1985. Recently, however, furth er fine mesh modeling for finite element analysis is required to yield higher accuracy in the analysis. The present study shows an application of FE analysis code to the highly sk ewed propeller for large container ships. Results of FE analysis show that the number of FE mesh affects largely on strength, and also the calculated strength with fine mesh gives good agreements to those of other FEM codes. A method to enlarge strength near the trailing edge was introduced considering the strength criterion on the blade. ※Keywords: FE strength analysis(유한요소 강도해석), Highly skewed propeller(고스큐 프로펠러), Strength decrease(강성저하), Fine mesh(정밀 격자), Astern condition(역회전 상태)