Feasibility Investigation of Zero-Torsional-Stiffness Couplings for Suppression of Resonance and Instability in Helicopter Drive Trains

Abstract

An investigation is made of the feasibility of designing a nonlinear shaft coupling, with zero or very low torsional stiffness at predetermined operating conditions, for helicopter drive trains. The purpose of such a coupling is to isolate torsional vibration and eliminate resonances. It is found that a coupling can be designed to have zero torsional stiffness at high rotational speeds by using the centrifugal force field on connecting links from the driving to the driven flange of the coupling. Previous designs of such couplings for low-speed applications have been used successfully in marine diesel drives. Design equations for two types of zero-stiffness couplings suitable for high speed turboshaft-powered helicopters are developed.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1974
Accession Number
AD0783390

Entities

People

  • John M. Vance
  • Mark S. Darlow
  • Roger A. Brown

Organizations

  • University of Florida

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Closed Loop Systems
  • Computational Science
  • Computer Programs
  • Computer Simulations
  • Computers
  • Control Systems
  • Differential Equations
  • Equations
  • Equations Of Motion
  • Frequency Response
  • Mechanical Engineering
  • Mechanics
  • Modulus Of Elasticity
  • Resonant Frequency
  • Shaft Couplings
  • Turbines
  • Two Dimensional

Fields of Study

  • Engineering
  • Physics

Readers

  • Aerospace Engineering
  • Electrical Engineering
  • Structural Dynamics.