A Comparison of Various Techniques for the Prediction of Mass-Loaded Mode Shapes and Natural Frequencies.

Abstract

The purpose of this investigation was to compare the results obtained from three modal prediction techniques. The first technique was an algorithm developed by Whaley for lightly damped structures (Method 1). Results using this algorithm were extracted from a thesis by Glenesk. The second method was the finite element method using NASTRAN (Method 2). The final method was the recovery of unloaded mass and stiffness matrices from the general matrix-vector differential equation of modal analysis using modal data obtained from an unloaded test item (Method 3).

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1981
Accession Number
ADA100820

Entities

People

  • Frank Broderick Atkinson

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Algorithms
  • Computer Programs
  • Data Analysis
  • Data Reduction
  • Differential Equations
  • Eigenvalues
  • Engineering
  • Engineers
  • Finite Element Analysis
  • Frequency Shift
  • Modal Analysis
  • Plastic Explosives
  • Resonant Frequency
  • Structural Components
  • Test Methods

Readers

  • Computer Vision.
  • Linear Algebra
  • Structural Dynamics.