
Accession Number : AD0812877
Title : FORMAT II  SECOND VERSION OF FORTRAN MATRIX ABSTRACTION TECHNIQUE. VOLUME I. ENGINEERING USER REPORT.
Descriptive Note : Final rept. May 65Oct 66,
Corporate Author : DOUGLAS AIRCRAFT CO LONG BEACH CA AIRCRAFT DIV
Personal Author(s) : Pickard, John
Report Date : JAN 1967
Pagination or Media Count : 294
Abstract : A digital computer program for matrix analysis of complex structures is presented. The basic program provides for abstraction of matrix and pseudo matrix operations on matrices of up to 2000 order. Available operations include all standard operations of matrix algebra and various nonstandard operations useful in structural analysis. The outstanding features of the basic program are: (1) the engineer programs his problem directly in matrix notation using simple Fortranlike statements with mnemonic names for matrices and without concern for the bookkeeping required for storage of data on external devices (e.g., tapes), (2) the program automatically allocates utilization of external storage devices for each job, (3) up to nine usercoded subroutines can be added to temporarily function as integral parts of the program, (4) where profitable and practical, data are stored and processed in compressed mode (zerovalued elements omitted) to take advantage of sparsity in a general and fundamental manner, and (5) the program is written entirely in Fortran IV for maximum universality. Two special usercoded subroutines are included for automatic generation of matrices required for analysis of structures by the Redundant Force Method and the Direct Stiffness Method. The program is documented in four volumes. Volume I is primarily a user's manual, Volume II is a programmer's manual, and Volumes III and IV describe the force and displacement method matrix generators, respectively. (Author)
Descriptors : *COMPUTER PROGRAMS), (*MATRICES(MATHEMATICS), (*AIRFRAMES, STRUCTURAL PROPERTIES), STRUCTURES, INSTRUCTION MANUALS, DIGITAL COMPUTERS, PROGRAMMING LANGUAGES, AERODYNAMIC LOADING, SUBROUTINES, LOADS(FORCES).
Subject Categories : Aircraft
Theoretical Mathematics
Computer Programming and Software
Computer Hardware
Distribution Statement : APPROVED FOR PUBLIC RELEASE