Accession Number:

ADA064545

Title:

A Critical Evaluation of Computer Subroutines for Solving Stiff Differential Equations.

Descriptive Note:

Technical rept. 1 Sep 77-15 Oct 78,

Corporate Author:

CINCINNATI UNIV OH DEPT OF ENGINEERING SCIENCE

Personal Author(s):

Report Date:

1978-10-15

Pagination or Media Count:

102.0

Abstract:

A number of commonly available computer subroutines for solving differential equation systems are tested and compared for their ability to solve stiff systems. A stiff system is defined as either a system with widely separated eigenvalues or time constants or a system with diverging exponential terms which have small or zero coefficients due to a particular choice of initial conditions. For example, it is believed that the governing differential equations of large complex mechanical system models such as, human-bodycrash-victim simulation models, finite segment structural models, and large vibrating system models are frequently stiff.

Subject Categories:

  • Numerical Mathematics
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE