General Rotorcraft Aeromechanical Stability Program (GRASP) Version 1.03 (User's Manual.

Abstract

The Rotorcraft Dynamics Division, Aeroflightdynamics Directorate, U.S. Army Aviation Research and Technology Activity has developed the General Rotorcraft Aeromechanical Stability Program (GRASP) to perform calculations that will assess the stability of rotorcraft in hovering flight and ground contact conditions. This computer program is designed to be a state-of-the-art, hybrid, finite-element/multibody code that can be applied to all existing and future helicopter configurations. While GRASP was specifically designed to solve rotorcraft stability problems, its innovative structure and formulation allow for applications to a wide range of structures. This manual describes the preparation of the input file required by Version 1.03 of GRASP, the procedures used to invoke GRASP on the NASA Ames Research Center Cray X-MP 48 computer, and the interpretation of the output produced by GRASP. The parameters used by the input file are defined, and summaries of the input file and the job control language are included. Keywords: Aeroelasticity; Rotary wings.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1988
Accession Number
ADA194157

Entities

People

  • A. S. Hopkins
  • Donald L. Kunz

Organizations

  • Ames Research Center

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Aerodynamic Forces
  • Air Flow
  • Air Masses
  • Army Aviation
  • Computer Programs
  • Computers
  • Data Sets
  • Eigenvalues
  • Eigenvectors
  • Flow
  • Gaussian Quadrature
  • Linear Systems
  • Mass Storage
  • Moment Of Inertia
  • Operating Systems
  • Steady State
  • Stiffness

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Aviation Science / Aeronautics.
  • Computer Science.