Development of a Myklestad's Rotor Blade Dynamic Analysis Code for Application to JANRAD

Abstract

Blade Dynamics Analysis is a major portion of a helicopter design. The success of the design is strictly related to accuracy of the blade dynamic calculations. The natural frequencies and the mode shapes are not only difficult to calculate but also can be a time consuming procedure. The Myklestad Extension Method gives the designer the opportunity of calculating correct values of the natural frequencies and the mode shapes when centrifugal forces are present. This thesis provides a transfer matrix Myklestad analysis programmed in MATLAB and a Graphical User Interface (GUI) tool built in the MATLAB programming language version 6.1, to implement the Myklestad Extension Method. The generated code and the GUI are designed to be a part of Blade Dynamics Module' of Joint Army/Navy Rotorcraft Analysis Design (JANRAD). For comparison, nonrotating and uniform beam data from Young and Felgar and the actual data of H-3 (S-6 1) helicopter blade are used. Results of the comparison show that the accuracy and robustness of the program are very good, which would make this generated code a valuable part of the helicopter designer's toolbox.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2002
Accession Number
ADA407154

Entities

People

  • Dogan Ozturk

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircraft Equipment
  • Aircraft Industry
  • Aircrafts
  • Airframes
  • Centrifugal Force
  • Computer Programming
  • Dynamic Response
  • Frequency
  • Graphical User Interface
  • Helicopter Rotors
  • Helicopters
  • Resonant Frequency
  • Rotary Wing Aircraft
  • Tilt Rotor Aircraft
  • Unmanned Aerial Vehicles
  • User Interface

Fields of Study

  • Engineering
  • Physics

Readers

  • Aerodynamics.
  • Computational Fluid Dynamics (CFD)
  • Computer Science.