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Tipo: | Trabalho de Conclusão de Curso |
Título: | Remarks on the sommerfeld effect characterization in the wavelet domain |
Autor(es): | Silva, Anderson Langone |
Primeiro Orientador: | Santos, Rodrigo Borges |
Abstract: | In many applications in engineering, a mechanical system operates in the nonstationary regime, either partially of fully, creating the possibility to generate nonlinearities in them. Great efforts have been made to better understand and characterize these phenomena. One of several methods that are being used for the processing of signals of a nonsta- tionary nature, as well as for the characterization of nonlinearities in mechanical systems, is the wavelet transform. A particular phenomenon that is seen in systems operating in the nonstationary regime is the Sommerfeld effect, which occurs due to the nonlinear interaction between a nonideal energy source and a mechanical system. This phenomenon can lead to high amplitudes of vibration for the system that in turn can cause damage in it. Therefore, this work presents an application of the continuous wavelet transform and the wavelet packet transform for the characterization of the Sommerfeld effect in mechanical systems where only the time response is at hand. Experimental procedures were performed where a nonideal energy source (an unbalanced DC motor) was used to excite (a) a portal frame and (b) a three-story shear-building. The results showed the effectiveness and the potential of the methods proposed. |
Palavras-chave: | Ondaleta Wavelet (Mathematics) Dinâmica não linear Nonlinear dynamics |
CNPq: | CNPQ::ENGENHARIAS::ENGENHARIA MECANICA |
Idioma: | eng |
País: | Brasil |
Editor: | Universidade Federal da Grande Dourados |
Sigla da Instituição: | UFGD |
metadata.dc.publisher.department: | Faculdade de Engenharia |
Citação: | SILVA, Anderson Langone. Remarks on the sommerfeld effect characterization in the wavelet domain. 2018. Trabalho de Conclusão de Curso (Bacharelado em Engenharia Mecânica) – Faculdade de Engenharia, Universidade Federal da Grande Dourados, Dourados, MS, 2018. |
Tipo de Acesso: | Acesso Restrito |
URI: | http://repositorio.ufgd.edu.br/jspui/handle/prefix/4361 |
Data do documento: | 2018 |
Aparece nas coleções: | Engenharia Mecânica |
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