Accession Number:

AD0814871

Title:

FORMAT II - SECOND VERSION OF FORTRAN MATRIX ABSTRACTION TECHNIQUE. VOLUME IV. A USER-CODED MATRIX GENERATOR FOR THE DISPLACEMENT METHOD.

Descriptive Note:

Final rept. May 65-Oct 66,

Corporate Author:

DOUGLAS AIRCRAFT CO LONG BEACH CA AIRCRAFT DIV

Personal Author(s):

Report Date:

1967-03-01

Pagination or Media Count:

239.0

Abstract:

A detailed description of the analytical approach, development, and use of a computer program which generates the matrices necessary for the analysis of general aircraft structures for deflections and stresses by the displacement method is presented. The Displacement Method Matrix Generator program is designed for use in conjunction with the FORMAT II system as a user-coded subroutine and, as such, will accommodate matrices of the order 2000 X 2000. Up to six degrees of freedom may be considered at each joint in the structure which is idealized as an assemblage of bar elements capable of resisting axial, bending and torsional forces and triangular and rectangular panel elements capable of resisting membrane forces. Applied loading may be any combination of mechanical loads at the joints, thermal loads resulting from bar element elongation due to temperature change, and initial joint displacements. The report includes details associated with the treatment of oblique reactions, and a complete description of the computer program input considerations, operation, and coding. Author

Subject Categories:

  • Aircraft
  • Computer Programming and Software
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE