RSICC Home Page SAHYB-2

RSICC CODE PACKAGE CCC-820

 

1.         NAME AND TITLE

SAHYB-2Solution of Ordinary Differential Equation with User-Supplied Subroutine.

 

2.         CONTRIBUTOR

            Commission des Communautes Europeennes, CETIS, 21020 – Ispra, Italy through the OECD Nuclear Energy Agency Data Bank, Issy-les-Moulineaux, France.

3.         CODING LANGUAGE AND COMPUTER

            Fortran IV; IBM 360 Series (C00820I036000).

 

4.         NATURE OF PROBLEM SOLVED

SAHYB-2 is a general purpose program for the solution of ordinary differential equations. These are written in a user-supplied subroutine called DER, which uses notations very close to mathematical formulas. Special mathematical functions included in the program are function generation, delay generation, steps, ramps and pulses, as well as a simplified standard output procedure - boundary value problems or parametric optimization may be handled by iterations adding a subroutine called REPEAT.

 

5.         METHOD OF SOLUTION

Integration is carried out by constant step fourth-order Runge-Kutta method, or by a fixed or variable step Adams-Moulton predictor corrector method.

 

6.         RESTRICTIONS OR LIMITATIONS

Maximum 150 differential equations of the first order;

Maximum 30 tables for function generator or delay lines.

 

7.         TYPICAL RUNNING TIME

            Varies greatly with the size of problem - range from few minutes for small systems (less than 10 differential equations) to a half hour for large problems.

 

8.         COMPUTER HARDWARE REQUIREMENTS

IBM 360.

 

9.         COMPUTER SOFTWARE REQUIREMENTS

            IBM 360 OS (Standard FORTRAN monitor.).

 

10.       REFERENCES

a) Included Documentation

                        None listed.

 

b) Background Documentation

H. D Hoop and R. Monterosso, “SAHYB-2 - A Programme for the Solution of Differential Equations Using an Analogue-Oriented Language,” Report EURATOM 3622/E.

 

11.       CONTENTS OF CODE PACKAGE

            The package is distributed on a CD with a compressed zip file including source files, and sample data and output.

 

12.       DATE OF ABSTRACT

            December 2013.

 

KEYWORDS: ORDINARY DIFFERENTIAL EQUATIONS, PROGRAMMING LANGUAGES, SPECIAL FUNCTIONS