1. Generalities#

1.1. Presentation#

A parametric study is a standard study (tab ETUDE) in which you want to vary one or more parameters, for example:

  • Material parameters: Young’s modulus, elastic limit,…

  • Geometric parameters: thickness of the shell, section of a beam,…

  • Load parameters: pressure, force orientation,…

*…

If these calculations are carried out as a standard calculation, the number of calculations to be carried out can become very large, several thousand calculations and their implementation becomes very tedious.

The objective of this document is to describe the methodology to be implemented in*Code_Aster* to carry out this type of study with the minimum of intervention.

Overall, a parametric study is the data of a nominal study (command file common to each parameter) and a set of parameters: Code_Aster will break down the nominal study into several studies according to the parameters provided, then will execute each combination taking into account the available machine resources.

_images/Cadre3.gif

Figure 1.1-a: Variations

1.2. Purpose of the tutorial#

The objective of the tutorial is to provide the user with as much information as possible to enable them to implement parametric studies.

This document answers the following questions:

  • How to prepare a parametric study (files, … ),

  • How to launch a parametric study (directories, options, … ),

  • How to generate and review a database,

  • How to use the available calculation resources (distribution of calculations, … ),

  • How to retrieve the results of the parametric study (command file, results directory).

In the last paragraph a detailed example of a parametric study is presented.

In this document, it is assumed that the user is familiar with standard*Code_Aster* calculations. If not, he is invited to consult the following documents [U1.04.00],… and to start by carrying out a classical study.