Accession Number : ADA190291

Title :   Finite-Element Grid Improvement by Minimization of Stiffness Matrix Trace.

Descriptive Note : Technical memo.,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Kittur, Madan G ; Huston, Ronald L ; Oswald, Fred B

PDF Url : ADA190291

Report Date : Dec 1987

Pagination or Media Count : 17

Abstract : A new and simple method of finite element grid improvement is presented. The objective is to improve the accuracy of the analysis. The procedure is based on a minimization of the trace of the stiffness matrix. For a broad class of problems this minimization is seen to be equivalent to minimizing the potential energy. The method is illustrated with the classical tapered bar problem examined earlier by Prager and by Masur. Identical results are obtained. Keywords: Finite element analysis; Mesh; Grid optimization; and Transmissions.

Descriptors :   *FINITE ELEMENT ANALYSIS, *STIFFNESS, ACCURACY, GRIDS, MATRICES(MATHEMATICS), OPTIMIZATION, POTENTIAL ENERGY, TAPER, TRANSMISSIONS(MECHANICAL), DYNAMIC LOADS

Subject Categories : Numerical Mathematics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE