Accession Number : AD0764366

Title :   FORMAT-FORTRAN Matrix Abstraction Technique. Volume VI. Supplement II. Description of Digital Computer Program Phase 1-Extended.

Descriptive Note : Final rept. 1 May 71-30 Apr 73,

Corporate Author : DOUGLAS AIRCRAFT CO LONG BEACH CALIF

Personal Author(s) : Morris,R. C.

Report Date : APR 1973

Pagination or Media Count : 110

Abstract : AL ANALYSIS, DEGREES OF FREEDOMThe FORMAT System has been augmented with highly efficient and reliable procedures for structural analysis via an alternate solution approach which combines the rigorous generation features of the existing force method with a new equation solving process characteristic of current displacement methods. As a result, a tenfold increase in potential problem size to in excess of 10,000 elastic degrees of freedom is the minimum currently anticipated as attainable on present major digital computers, and linear behavioral characteristics can take immediate advantage of any advance in hardware capabilities. In making these provisions, considerable emphasis was placed on the control of both physical and numerical error throughout the total solution process. To date an extensive range of complex configurations representing actual aerospace structures with up to 6500 degrees of freedom have been successfully processed as single entities on a production basis, that is, within the confines of a production schedule and with maximum reliability at minimum cost. (Author modified abstract)

Descriptors :   (*STRUCTURAL PROPERTIES, *COMPUTER PROGRAMMING), AERODYNAMIC CONFIGURATIONS, DIGITAL COMPUTERS, MATRICES(MATHEMATICS), THERMAL STRESSES, DEFORMATION, ERRORS, AIRFRAMES

Subject Categories : Aircraft
      Computer Programming and Software
      Computer Hardware
      Structural Engineering and Building Technology
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE