The use of operational modal analysis in the process of modal parameters identification in a rotating machine supported by roller bearings

Autor(es)

Storti, Gustavo ^[1] ; Machado, Tiago ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Mech Engn, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Mechanical Science and Technology; v. 35, n. 2, p. 471-480, FEB 2021.
• Citações Web of Science: 0

Resumo

This paper investigates the use of conventional operational modal analysis (OMA) techniques for modal parameters identification of a rotating system supported by roller bearings. Although largely applied in civil engineering, in-depth studies on different types of systems are still limited in the literature. The novel of the paper is to address such issue by applying conventional OMA methods, such as enhanced frequency domain decomposition (EFDD) and stochastic subspace identification (SSI-data), to identify the modal parameters of a rotating machine, investigating the challenging particularities of these systems due to their inherent operating conditions, especially regarding the presence of harmonic forces, eventually closed-spaced modes, and non-proportional damping due to the bearings. The results presented in the experimental tests showed that, with the use of specific tools, in comparison with traditional experimental modal analysis (EMA), the used OMA methods have managed to successfully identify the modal parameters of a roller bearing supported rotor. (AU)

• Processo FAPESP: 17/07454-8 - Proposta de um modelo teórico-experimental para a interação rotor-mancais-estrutura
• Beneficiário: Tiago Henrique Machado
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/20363-6 - Identificação e controle tolerantes a falhas em sistemas rotativos
• Beneficiário: Katia Lucchesi Cavalca Dedini
• Modalidade de apoio: Auxílio à Pesquisa - Temático