PRACTICAL EXPERIENCE WITH FINITE ELEMENT ANALYSIS OF PROPELLER BLADES

Finite-element stress analysis is now a well-accepted procedure for assessing the structural integrity of propeller blades. Many approaches reported in the literature are custom made codes for estimating the stress distribution, deflections, natural frequencies and hydroelastic interactions. Input to these codes can involve tedious work to define nodes, connectivity and loads and few parametric evaluations are available. This paper describes an automated procedure for flexible but routine definition of the nodes, connectivity and loads that makes for extremely rapid analysis and presents an assessment of plate and brick elements with several configurations (eg triangular and quadrilateral planforms). For the cases considered, results demonstrate that satisfactory correlation with measured stress distributions, in the steady ahead and astern conditions, and satisfactory correlation with measured natural frequencies are obtained with a variety of elements and element spacings. The blade deflection is sometimes better correlated with data for three-dimensional elements but the correlations are limited to the few data sets available and not consistently achieved. Exploratory estimates are presented to assess the effect of rake and skew (ie blade mid-chord position) on the stress distribution and to offer design guidance.

  • Supplemental Notes:
    • Propellers/Shafting '94 Symposium; 20-21 Sept 1994; Virginia Beach, VA, USA. Sponsored and Publ by SNAME, USA. Pprs. Ppr no 19 [17 p, 29 ref, 19 fig]
  • Authors:
    • Brockett, T
  • Publication Date: 1994

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717750
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM