Vibration signatures of a rotor-coupling-bearing system under angular misalignment

Autor(es)

da Silva Tuckmantel, Felipe Wenzel ^[1] ; Cavalca, Katia Lucchesi ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Lab Rotating Machinery, Fac Mech Engn, 200 Rua Mendeleyev, BR-13083860 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MECHANISM AND MACHINE THEORY; v. 133, p. 559-583, MAR 2019.
• Citações Web of Science: 3

Resumo

Forces and moments arise in flexible couplings while accommodating misalignments. These efforts are exerted on the coupled shafts, influencing the rotor dynamics and giving rise to vibration patterns, which are of interest for investigations focusing on malfunction signatures and, consequently, on fault identification and diagnosis. This work proposes the comparison between two approaches for modeling the forces and moments generated by a metallic disc coupling under angular misalignment. The first is a well-established model based on the linear bending flexure of the disc packs, and assuming the misalignment efforts are the sum of the first four harmonic components. In the second approach, a structural analysis of the coupling is conducted through finite element method, where the cyclic nature of coupling efforts is captured by the application of consecutive shaft spin angles. Steady state responses are simulated and then both orbit shapes and displacements spectrum are analyzed in order to highlight harmonic components rising due to misalignment. Finally, test rig measurements are compared to predicted results by the theoretical approach presented in this work. (C) 2018 Elsevier Ltd. All rights reserved. (AU)

• 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