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Estatística
Título: MODEL FOR THE HIGH FREQUENCY RESPONSE OF LAMINATED CYLINDRICAL SHELLS
Autor: CARLOS ENRIQUE RIVAS ARONI
Colaborador(es): ARTHUR MARTINS BARBOSA BRAGA - Orientador
Catalogação: 17/MAR/2003 Língua(s): PORTUGUESE - BRAZIL
Tipo: TEXT Subtipo: THESIS
Notas: [pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio.
[en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio.
Referência(s): [pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=3354&idi=1
[en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=3354&idi=2
DOI: https://doi.org/10.17771/PUCRio.acad.3354
Resumo:
This dissertation addresses the problem of modeling the dynamic response of laminated cylindrical shells in the high frequency range -short wavelength-. In this range of frequency, traditional theories fail to provide an accurate result of the vibratory structural response; So, in order to overcome this shortcoming, we employed a model based on Reddys discrete layer-wise theory. In this method the cylindrical shell is discretized in an arbitrary number of layers in the radial direction, and a three dimensional stress state is assumed in each one. Hence, the application of this method let the representation of complexes displacement elds through the thickness of the shell. This characteristic is representative of displacement elds associated to guided waves in the high frequency range. In the frequency domain,the governing equations were written in a state space form by applying a variational principle. The solution of this state equation was obtained by employing an algorithm based on a discrete version of the Ricatti transformation.To validate the method proposed in this dissertation, comparisons of the present work to the exact wave-dispersion spectra were assessed with excellent results. It indicates that the present method can predict an accurate description of the dynamic response in the high-frequency range. In the low frequency range, the results of the theory of Reddy were compared with the nite element method and, again, a good accuracy was obtained.
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