3. Modeling A#
3.1. Characteristics of modeling#
The bar is cut into 2 parts of equal dimensions. Each substructure under consideration is meshed into segments to which « bar » elements are assigned.
The structure is studied using the harmonic substructuration method with interfaces of the type CRAIG - BAMPTON HARMONIQUE.
The modal base used is composed of 4 eigenmodes for the right substructure, 5 eigenmodes for the left substructure to which are added the harmonic constrained modes associated with the interfaces (calculated at \(300\mathrm{Hz}\)). This pulse value has no influence on the result, it is arbitrary [bib3]).
3.2. Characteristics of the mesh#
Number of knots: 5
Number of meshes and types: 5 SEG 2
3.3. Tested sizes and results#
Movement \((m)\) |
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Reference |
Tolerance |
||
Real part |
—7.00 10—11 |
2.10—3 |
|
Imaginary part |
5.07 10—9 |
2.10—3 |
|
Speed \((m/s)\) |
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Real part |
—3.18 10—6 |
2.10—3 |
|
Imaginary part |
—4.40 10—8 |
2.10—3 |
|
Acceleration \((m/{s}^{2})\) |
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Real part |
2.76 10—5 |
2.10—3 |
|
Imaginary part |
—2.00 10—3 |
2.10—3 |
|