General Rotorcraft Aeromechanical Stability Program (GRASP) - Theory Manual

Abstract

The Rotorcraft Dynamics Division, Aeroflightdynamics Directorate, U. S. Army Aviation Research and Technology Activity (AVSCOM) has developed the General Rotorcraft Aeromechanical Stability Program (GRASP) to calculate aeroelastic stability for rotorcraft in hovering flight, vertical flight, and ground contact conditions. In this report, GRASP is described in terms of its capabilities and the philosophy behind its modeling. The equations of motion that govern the physical system are described, as well as the analytical approximations used to derive the equations. These equations include the kinematical equation, the element equations, and the constraint equations. In addition, the solution procedures used by GRASP are described.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1990
Accession Number
ADA235144

Entities

People

  • A. S. Hopkins
  • Dewey H. Hodges
  • Donald L. Kunz
  • Howard E. Hinnant

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms
  • Cyber
  • Ground and Sea Platforms
  • Sensors
  • Space

DTIC Thesaurus Topics

  • Aerodynamic Forces
  • Air Masses
  • Airframes
  • Angular Momentum
  • Army Aviation
  • Computational Fluid Dynamics
  • Computational Science
  • Coordinate Systems
  • Differential Equations
  • Equations
  • Equations Of Motion
  • Finite Element Analysis
  • Flow Fields
  • Mechanics
  • Molecular Dynamics
  • Moment Of Inertia
  • Steady State

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
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