Accession Number : AD0840136

Title :   STRESS WAVES IN LAYERED ARBITRARY MEDIA SLAM CODE FREE-FIELD STUDY. VOLUME II. COMPUTER PROGRAM DESCRIPTION OF NONLINEAR SLAM CODE.

Descriptive Note : Final rept. 17 Aug 66-23 Feb 68,

Corporate Author : IIT RESEARCH INST CHICAGO IL

Personal Author(s) : Costantino, C. J.

Report Date : JUL 1968

Pagination or Media Count : 419

Abstract : The nonlinear SLAM code, described herein, was initially developed to operate on the IBM 7094 computer system. The present detailed discussion applies to the original version running on the IBM 7094 machine, although this is by no means the most efficient (i.e., fastest running) version of the code. The program is written in FORTRAN IV (Version 13) and utilizes extensively the features of the IBSYS operating system, particularly the overlay capability of the IBJOB Loader. The SLAM code described herein can handle up to 1000 node points (2000 degrees of freedom), although this can be rather easily extended if desired. The capability for treating large problems has been achieved by a technique of automatic renumbering of node points (or minimizing band widths of tables) which enables the sequential processing of element and node point data. This technique, is used to properly partition the system matrices and ensures that the proper data are in machine core at the appropriate times during the time history computation.

Descriptors :   *COMPUTER PROGRAMS), (*SEISMIC WAVES, STRESSES), (*SHOCK WAVES, NUCLEAR EXPLOSIONS, VISCOELASTICITY, STRAIN(MECHANICS), ELASTIC PROPERTIES, PLASTIC PROPERTIES, EQUATIONS OF MOTION, NONLINEAR SYSTEMS, LOADS(FORCES), ACCELERATION, VELOCITY, PRESSURE, MATRICES(MATHEMATICS), NUMERICAL ANALYSIS, BLAST, NETWORKS, PROPAGATION, CREEP, MATHEMATICAL PREDICTION, HARDENING, MECHANICAL PROPERTIES, SOILS, SITE SELECTION, ROCK, YIELD POINT, CRATERING, DIGITAL COMPUTERS, STRATIGRAPHY, DIFFERENTIAL EQUATIONS, INTERFACES, COMPUTER PROGRAMMING, SUBROUTINES.

Subject Categories : Seismology
      Computer Programming and Software
      Computer Hardware
      Computer Systems
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE