Eventos Anais de eventos
MECSOL 2022
8th International Symposium on Solid Mechanics
Non-conforming Mesh Dynamical Substructuring: Case Study of a Tuned Mass Damper for a CubeSat
Submission Author:
Guilherme Sobral de Albuquerque , SP , Brazil
Co-Authors:
Guilherme Sobral de Albuquerque, Flávio Yukio Watanabe
Presenter: Guilherme Sobral de Albuquerque
doi://10.26678/ABCM.MECSOL2022.MSL22-0064
Abstract
As a means of enabling the study for coupled structures from its subparts, Dynamic Substructuring is a technique which has played a significant role in structural dynamics, and has been developed in order to better combine analytical and experimental models. This work presents a case study of a Tuned Mass Damper design for a pre-existing model of a CubeSat using two different approaches: Making a new system with two bodies, meshing the structure and getting the modal analysis via Finite Element Analysis; and reusing the model of the satellite, making a new one for the damper alone and assembling both via Dynamic Substructuring. While the former approach results in a new model with no loss of accuracy, the latter enables a faster development -- reducing time both by facilitating parallel design for each of the substructures, and by reducing the computational time on the iterations of multiple simpler parts instead of a complex one --, as well as a better understanding of the individual parts of the system, such as the main modes of vibration and respective frequencies, which in this case could used as a starting point for the fine-tuning of the damper design, all while maintaining a high-fidelity model of the full system. The model was analyzed regarding its response in the frequency range of interest, with respect to the deformations of the most fragile areas in the structure. The analysis of the assembled system was then be compared to the full-model simulation (with conformed contact meshing) in order to validate the model, as well as the method. The frequency response functions similar, and the relative error for the resonance frequencies were less than 0.2%, indicating the success of the method in keeping the model’s fidelity.
Keywords
dynamic vibration absorber, Miniaturized Satellite, Finite Element Method, modal analysis, Dynamic substructuring
