AE
A. Esser
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2 records found
1
Master thesis
(2026)
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A. Esser, P.P. Sundaramoorthy, Kees Honselaar, Henk Cruijssen, I. Uriol Balbin, V. Yaghoubi Nasrabadi
Semi-flexible solar arrays offer lightweight alternatives to rigid spacecraft structures but are susceptible to dynamic out-of-plane launch deformations. This research evaluates how accurately a finite element (FE) model predicts the dynamic behavior of a scaled prototype. Experimental Modal Analysis (EMA) using a shaker and Scanning Laser Doppler Vibrometer was compared against an Abaqus FE model employing element birth-and-death manufacturing simulations.
For the unpopulated structure, the FE model predicted the first three membrane modes within a 9% error and frame modes within 14%. For the populated prototype, utilizing a simplified distributed-mass approach (incorporating 40% of the photovoltaic mass to neglect local stiffness), frequency errors remained below 5% and 13% for membrane and frame modes, respectively.
The results demonstrate strong numerical and experimental correlation, validating that this FE framework successfully captures global dynamic characteristics for practical structural analysis.
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For the unpopulated structure, the FE model predicted the first three membrane modes within a 9% error and frame modes within 14%. For the populated prototype, utilizing a simplified distributed-mass approach (incorporating 40% of the photovoltaic mass to neglect local stiffness), frequency errors remained below 5% and 13% for membrane and frame modes, respectively.
The results demonstrate strong numerical and experimental correlation, validating that this FE framework successfully captures global dynamic characteristics for practical structural analysis.
...
Semi-flexible solar arrays offer lightweight alternatives to rigid spacecraft structures but are susceptible to dynamic out-of-plane launch deformations. This research evaluates how accurately a finite element (FE) model predicts the dynamic behavior of a scaled prototype. Experimental Modal Analysis (EMA) using a shaker and Scanning Laser Doppler Vibrometer was compared against an Abaqus FE model employing element birth-and-death manufacturing simulations.
For the unpopulated structure, the FE model predicted the first three membrane modes within a 9% error and frame modes within 14%. For the populated prototype, utilizing a simplified distributed-mass approach (incorporating 40% of the photovoltaic mass to neglect local stiffness), frequency errors remained below 5% and 13% for membrane and frame modes, respectively.
The results demonstrate strong numerical and experimental correlation, validating that this FE framework successfully captures global dynamic characteristics for practical structural analysis.
For the unpopulated structure, the FE model predicted the first three membrane modes within a 9% error and frame modes within 14%. For the populated prototype, utilizing a simplified distributed-mass approach (incorporating 40% of the photovoltaic mass to neglect local stiffness), frequency errors remained below 5% and 13% for membrane and frame modes, respectively.
The results demonstrate strong numerical and experimental correlation, validating that this FE framework successfully captures global dynamic characteristics for practical structural analysis.