Estudo das características modais de um modelo de aeronave em alumínio
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Data
2016-12-02
Autores
Oliveira Junior, Adelmo Fernandes de [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
A análise modal experimental é uma das técnicas mais importantes na caracterização dinâmica de estruturas. No setor aeroespacial a analise modal experimental é conhecida como Ground Vibration Test (GVT). Na Força Aérea Brasileira, o órgão responsável para executar o GVT é o Laboratório de Ensaios de Vibração (LEVI) da Divisão de Integração e Ensaio (AIE) do Instituto de Aeronáutica e Espaço (IAE). Esta pesquisa foi realizada neste laboratório que possui as facilidades para a execução de GVT. O objetivo principal deste estudo foi aprimorar a metodologia de ensaio de análise modal aplicada a um modelo de aeronave em alumínio do tipo GARTEUR SM-AG-19. O estudo desenvolvido possibilita que em ensaios futuros os resultados sejam replicados, no intuito de avaliar a integridade do sistema de medição, levando em consideração aspectos da influência do torque na junta aparafusada entre a asa e a fuselagem. Para validar a metodologia os resultados obtidos neste estudo foram comparados com os resultados de dois estudos desenvolvidos no Brasil. A contribuição principal desta pesquisa é relacionada ao estudo do efeito da variação do torque na junta aparafusada entre a asa e a fuselagem sobre os parâmetros modais da estrutura.
The experimental modal analysis is one of the most important techniques in the dynamic characterization of structures. In the aerospace industry, the experimental modal analysis is known as Ground Vibration Test (GVT). In the Brazilian Air Force, the institution responsible for executing the GVT is the Laboratory of Vibration Testing (LEVI) of the Integration and Testing Division (AIE) of the Institute of Aeronautics and Space (IAE). This research was carried out on this laboratory that has the facilities to perform the GVT. The main objective of this study was to improve the modal analysis test methodology applied to an aluminium aircraft model named GARTEUR SM-AG-19. This study allows the results to be replicated in future tests in order to evaluate the integrity of the measurement system, taking into account aspects of the influence of the torque on the bolted joint between wing and fuselage. In order to validate the methodology the results obtained in this study were compared to the results of two studies developed in Brazil. The main contribution of this research is the study of the torque variation effect on the bolted joint between wing and fuselage on the modal parameters of the structure.
The experimental modal analysis is one of the most important techniques in the dynamic characterization of structures. In the aerospace industry, the experimental modal analysis is known as Ground Vibration Test (GVT). In the Brazilian Air Force, the institution responsible for executing the GVT is the Laboratory of Vibration Testing (LEVI) of the Integration and Testing Division (AIE) of the Institute of Aeronautics and Space (IAE). This research was carried out on this laboratory that has the facilities to perform the GVT. The main objective of this study was to improve the modal analysis test methodology applied to an aluminium aircraft model named GARTEUR SM-AG-19. This study allows the results to be replicated in future tests in order to evaluate the integrity of the measurement system, taking into account aspects of the influence of the torque on the bolted joint between wing and fuselage. In order to validate the methodology the results obtained in this study were compared to the results of two studies developed in Brazil. The main contribution of this research is the study of the torque variation effect on the bolted joint between wing and fuselage on the modal parameters of the structure.
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Palavras-chave
Análise modal experimental, Ground vibration test, Modelo de aeronave em alumínio, GARTEUR SM-AG-19, Modal analysis, Aluminum aircraft model