Satellite equipment vibroacoustic analyzes are essential to the success of a mission. These analyzes are often simplified or ignored when the equipment is oversized and undergoes the qualification process by experimental testing. The problem with this approach is that it is difficult to optimize structures for lack of information during design. In addition, it is very expensive to perform optimization by iteration through vibroacoustic tests. The objective of this study is to establish a numerical analysis method to simulate the effect of vibroacoustic waves on a satellite solar panel substrate.
The thesis has been divided into two main sections. The first section presents the experimental tests used to validate computational models, and the second section with numerical analyzes performed using software tools and mathematical models. In each section, the assembly of the solar panel substrate is divided into two parts : the panel itself as well as the fixation support system. It is by individually checking these subsets that the validation of the model is performed to obtain a representative analysis.
The experimental part focuses on the extraction of the modal properties of the panel assembly and the fixation support system. For the fixation support, characterization of its rigidity is the main objective. Using an iterative correlation method, a simplified model of spring and damper is obtained. This step made it possible to identify the properties of the boundary conditions in order to eliminate certain sources of errors on the global simulation model. For the panel, a linear regression method is used to characterize its modal properties. For the numerical analyzes, two methods were used : the finite element method (FEM) and the boundary element method (BEM). The Siemens NX tool as well as ESI VA-One are used for these purposes. To validate the numerical models, a correlation of the modal properties of the tests and numerical models were carried out. The results showed that the models developed are valid since they represent relatively well the assembly of the solar panel substrate as manufactured and tested.
| Date | 20 Nov 2018 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Simon Joncas (Supervisor) & Annie Ross (Co-supervisor) |
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Letarte, A. (Author),
Joncas (Supervisor) & Ross (Co-supervisor),
20 Nov 2018Student thesis: Master's thesis › Master in Engineering: Mechanical Engineering