Accession Number : AD0764360

Title :   FORMAT-Fortran Matrix Abstraction Technique. Volume II-Supplement IV. Description of Digital Computer Program-Extended.

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

Corporate Author : DOUGLAS AIRCRAFT CO LONG BEACH CALIF

Personal Author(s) : Chahinian,L. ; Miyawaki,S. H.

Report Date : APR 1973

Pagination or Media Count : 105

Abstract : RATION 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. Complete machine independence has been maintained in this latest release of FORMAT and many additions and refinements incorporated which either complement the efficiency afforded by the alternate solution approach or provide increased generality and reliability of the program. (Modified author abstract)

Descriptors :   (*AIRFRAMES, STRUCTURAL PROPERTIES), (*COMPUTER PROGRAMMING, STRUCTURAL PROPERTIES), MATRICES(MATHEMATICS), COMPUTER PROGRAMS, CORRECTIONS, INSTRUCTION MANUALS, DIGITAL COMPUTERS, ALGORITHMS, INPUT OUTPUT DEVICES

Subject Categories : Aircraft
      Computer Programming and Software
      Computer Hardware
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE