Investigation of Vibration Reduction through Structural Optimization.

Abstract

The purpose of this program was to investigate structural optimization techniques for vibration reduction. The results of a practical evaluation of two such techniques, the Vincent circle method and the forced response strain energy method, are discussed. Initial comparison studies of the two methods based on stiffness parameter variations were conducted using an elastic-line NASTRAN model of the AH-1G helicopter. The forced response strain energy method was then applied to a large complex built-up NASTRAN AH-1G model. This application provided useful comparative data identifying the structural elements considered to be the primary contributors to the response. Realistic structural stiffness changes in these elements were assessed to determine their effect on vibration reduction. The Vincent circle method was further evaluated for mass tuning, damping, and dynamic absorber parameters using the elastic-line model. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1980
Accession Number
ADA088917

Entities

People

  • Horace W. Hanson

Organizations

  • Bell Flight

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Airframes
  • Computer Programs
  • Dynamic Response
  • Equations
  • Frequency
  • Frequency Response
  • Fuselages
  • Government Procurement
  • Governments
  • Helicopters
  • Literature Surveys
  • Resonant Frequency
  • Stiffness
  • Test And Evaluation
  • Tuning
  • Vibration

Readers

  • Marine Hydrodynamics
  • Reinforced Composite Materials
  • Systems Analysis and Design