Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
ANALYSIS OF THE DYNAMIC BEHAVIOR OF A COMPOSITE HOLLOWSHAFT CONSIDERING UNCERTAIN AND SENSITIVITY INFORMATION
Submission Author:
Leandro Soares Silva , MG
Co-Authors:
Leandro Soares Silva, Paulo Costa Porto de Figueiredo Barbosa, Aldemir Ap Cavalini Jr, Valder Steffen Jr, Fabian Andres Lara-Molina
Presenter: Leandro Soares Silva
doi://10.26678/ABCM.COBEM2019.COB2019-0699
Abstract
Composite materials have been widely used in engineering applications due to their advantages over conventional materials. Following this trend, researchers on rotordynamics have shown interest in the substitution of metallic shafts by composite shafts, resulting in higher operating speeds, improvements of the efficiency, and weight decreasing, among other potential advantages. In this contribution, the so-called Simplified Homogenized Beam Theory (SHBT) associated with the finite element (FE) method was used to model a rotating machine composed of a composite shaft. The formulated model was used to represent the dynamic behavior of the rotor operating under sub-critical conditions. The definition of several parameters of the composite shaft is required for the corresponding numerical model. Nevertheless, small variations on these parameters can modify the dynamic behavior of the shaft. Thus, interval uncertainty and sensitivity analyses are used to assess the vibration responses of the composite shaft. The effects of the uncertain parameters on the dynamic behavior of the rotor system are evaluated for different rotation speeds.
Keywords
Rotating machine, composite hollow shaft, Uncertainty Analysis., interval approach, Sensitivity analysis
