Accession Number : AD0768721

Title :   Stiffness Matrix Reduction for Large Structural Systems Using Cholesky Decomposition.

Descriptive Note : Interim rept.,

Corporate Author : ARMY CONSTRUCTION ENGINEERING RESEARCH LAB CHAMPAIGN ILL

Personal Author(s) : Holze,Gordon

Report Date : OCT 1973

Pagination or Media Count : 29

Abstract : Using a method similar to that proposed by Rosen and Rubinstein, a computer program was written to reduce the stiffness matrix of a multi-degree of freedom system down to an equivalent stiffness matrix involving a smaller number of degrees of freedom. Since this method uses Cholesky decomposition instead of the more common matrix inversion, it is useful for substructure problems in which a large number of degrees of freedom are to be condensed and eliminated. The computer program in Appendix B is most efficient when used for a large degree of freedom system with a sparse stiffness matrix. An example problem is explained in Appendix C to demonstrate the use of the program. (Author)

Descriptors :   (*CONTAINERS, STRUCTURAL PROPERTIES), MATRICES(MATHEMATICS), LOADS(FORCES), COMPUTER PROGRAMS

Subject Categories : Computer Programming and Software
      Containers and Packaging
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE