Accession Number : ADA182324

Title :   Application of GRASP (General Rotorcraft Aeromechanical Stability Program) to Nonlinear Analysis of a Cantilever Beam,

Corporate Author : NATIONAL AERONUATICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER

Personal Author(s) : Hinnant,Howard E ; Hodges,Dewey H

PDF Url : ADA182324

Report Date : Apr 1987

Pagination or Media Count : 11

Abstract : The General Rotorcraft Aeromechanical Stability Program (GRASP) was developed to analyse the steady-state and linearized dynamic behavior of rotorcraft in hovering and axial flight conditions. Because of the nature of problems GRASP was created to solve, the geometrically nonlinear behavior of beams is one area in which the program must perform well in order to be of any value. Numerical results obtained from GRASP are compared to both static and dynamic experimental data obtained for a cantilever beam undergoing large displacements and rotations caused by deformations. The correlation is excellent in all cases.

Descriptors :   *HOVERING, *CANTILEVER BEAMS, FLIGHT, DEFORMATION, DYNAMICS, LINEARITY, ROTARY WING AIRCRAFT, GEOMETRIC FORMS, NONLINEAR SYSTEMS, DISPLACEMENT, NONLINEAR ANALYSIS, ROTOR BLADES(ROTARY WINGS), DEFLECTION, MASS, STATIC TESTS, DYNAMIC TESTS, ROTATION, DYNAMIC RESPONSE, EXPERIMENTAL DATA, CORRELATION, AERODYNAMIC STABILITY, VERTICAL ORIENTATION

Subject Categories : Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE