Analytical Calculation of Helicopter Main Rotor Blade Flight Loads in Hover and Forward Flight

Abstract

An aeroelastic analysis was conducted to calculate flight loads on the OH-58D Kiowa Warrior main rotor blade at hover and forward flight conditions. Centrifugal force and flap and chord bending moments were calculated with the University of Maryland Advanced Rotorcraft Code (UMARC) comprehensive helicopter aeroelastic analysis code. The calculated loads were correlated with available flight data for the Bell model 406LM helicopter (model 406T rotor blade) to validate the analytical model. After the correlation study, UMARC was used to calculate blade loads at the ballistic test section radial stations. These baseline loads were represented during the ballistic tests. This report presents the methods and results of the aeroelastic analysis.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2004
Accession Number
ADA423149

Entities

People

  • Ki C. Kim

Organizations

  • United States Army Research Laboratory

Tags

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aircrafts
  • Airframes
  • Bending Moments
  • Centrifugal Force
  • Dynamic Response
  • Equations
  • Flight Loads
  • Frequency
  • Helicopter Rotors
  • Helicopters
  • Military Research
  • Resonant Frequency
  • Rotary Wing Aircraft
  • Structural Components
  • Test And Evaluation
  • Vehicles

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Aerospace Engineering