Foremast Vibrations on HMAS Parramatta.

Abstract

As part of a refit programme, a new lattice has been fitted to HMAS Parramatta. The mast is constructed, generally, from aluminum alloy tubing an carries radar, radio, and other navigation equipment. Aeronautical Research Laboratories had been requested to measure the resonant frequencies and mode shapes of the mast in the frequency range 0 to 20 hertz. Figures 1 and 2 show the general construction of the mast and provide the major dimensions. At this time, A.R.L. had taken delivery of the PAFEC computer programme for use in dynamic structural analysis. PAFEC stands for Programme for Automatic Finite Element Calculations and was developed by PAFEC Ltd. of Nottingham, U.K. It was decided to use this programme to model the mast and compare the results with those measured on the physical mast.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1982
Accession Number
ADA122978

Entities

People

  • A. Goldman
  • Petra M. Cox

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Accelerometers
  • Air Force
  • Aircrafts
  • Aluminum
  • Aluminum Alloys
  • Computer Programs
  • Computers
  • Department Of Defense
  • Elements
  • Engineering
  • Frequency
  • Masts
  • Mathematical Models
  • Measurement
  • Propeller Shafts
  • Propellers
  • Resonant Frequency

Readers

  • Academic Conference Management
  • Naval Architecture and Marine Engineering.
  • Structural Dynamics.