Blade Stress Analysis of Highly Skewed Propeller

Abstract

Blades stress conditions of Highly Skewed Propellers (HSP) become severe with the increase of skew, so in designing HSP it is necessary to estimate the blade stress exactly. The authors carried out the finite element analyses of HSP blades using three-dimensional elements, and l)confirmed that numerical results agreed well with experimental ones by strain gauges, and that finite element method was very valuable, and 2)developed SPROSAS (Screw Propeller Blade Stress Analysis System) for the purpose of efficient analysis of HSP blade, and 3)confirmed through calculations of blade series with different skews that maximum stresses and deformations of the blades increased remarkably with the increase of skew.