Magneto-Mechanical Dynamic System Modeling Using Computer Code Chaining and Field Projections

Complex systems involve several physical models such as magnetism, mechanics, and thermal science. Such models are divided into subproblems of different physical natures. Their resolutions require the development of specific computer programs, which is often complex and time consuming. Another approach is the use of dedicated software which are in this study linked together with the help of field projections. This reduces the weight of programming while improving the overall flexibility. This study will focus on magneto-mechanical system modelling in time domain. Starting from a transient analysis we will show that natural frequencies can be recovered with high accuracy. Discussions about the efficiency of time scheme and the coupling process are proposed.

I. Introduction

The aim of our study is to model complex parts of large turbo-generators. The resort to indirect coupling [12], [3] allows the use of numerically adapted meshes for each subproblem. It also avoids to take into account irrelevant parts of some problems (e.g., air domain for mechanical study) while facilitating the remeshing process. Such data transfers allow the replacement of subcodes or subproblems and are the most difficult stage of the method [1], [6].