Vibration Analysis of Flexible Rotating Rings Using a Spectral Element Formulation

Autor(es)

Beli, Danilo ^[1] ; Silva, Priscilla Brandao ^[1] ; de Franca Arruda, Jose R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Computat Mech, Fac Mech Engn, BR-13083860 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME; v. 137, n. 4 AUG 2015.
• Citações Web of Science: 7

Resumo

In this work, the forced response of rotating rings exhibiting nonperiodic and periodic variations in material properties and geometry is assessed by means of the spectral element method (SEM). Based on the Euler-Bernoulli beam theory, a spectral element for a planar rotating ring is derived. This spectral element allows the investigation of the effects of structural damping, internal pressure and elastic foundations in the harmonic response of rotating rings. The dynamic response of rotating rings including periodic imperfections that lead to band gap effects is addressed. The spectral element formulation provides exact solutions within the range of validity of the applied theory using a reduced number of degrees-of-freedom. Thus, it contributes to reducing the computational time. It also provides a straightforward way to solve structural dynamics problems including arbitrary boundary conditions and discontinuities. The proposed formulation is validated by comparison with analytical solutions, which are available only for uniform homogenous rings. (AU)

• Processo FAPESP: 10/17317-9 - Estudo da propagação de ondas elásticas em estruturas periódicas
• Beneficiário: Priscilla Brandão Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 14/19054-6 - Modelagem de estruturas periódicas com aplicações a cristais fonônicos e metamateriais acústicos
• Beneficiário: Danilo Beli
• Modalidade de apoio: Bolsas no Brasil - Doutorado