Analysis of the MacKenzie Class Mast of HMCS QU'APPELLE.

Abstract

The finite element program VAST, and experimental vibration data are used to analyze a serious vibration problem with the new mast on the Mackenzie class ship, DDE 261, HMCS AU'APPELLE. It has been determined that the mast's natural frequency of vibration falls into the range of excitation frequencies produced by the propeller shaft rotation. It is postulated that the propeller excitation is driving both resonant hull and mast modes together. After analysis of some possible solutions using Vast, it is determined that there is no simple solution that would shift the mast's natural frequency completely out of the range of excitation resulting from the propeller shaft rotation. However, some trial solutions are suggested that may provide sufficient attenuation of the mast vibration for safe and normal operation of the ship. In addition, an analysis approach is suggested which would avoid this type of problem in future designs. Additional keywords: Frequency response; Dynamic tests; VAST(Vibration and Strength Analysis Program). (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1985
Accession Number
ADA159358

Entities

People

  • D. J. Hussey
  • Dallin Smith
  • N. G. Pegg

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Accelerometers
  • Aluminum
  • Composite Materials
  • Elements
  • Engineering
  • Excitation
  • Finite Element Analysis
  • Frequency
  • Frequency Response
  • Propeller Shafts
  • Propellers
  • Resonant Frequency
  • Rotation
  • Standards
  • Test Methods
  • Vibration

Readers

  • Astronomy and Astrophysics.
  • Maritime and Naval Warfare Studies
  • Structural Dynamics.