Application of fuzzy random finite element method on rotor dynamics

作者：Xu, Qi; Zhao, Qian; Yao, Hongliang^*; Wen, Bangchun

来源：Journal of Vibroengineering, 2014, 16(4): 1854-1863.

• fuzzy
• stochastic
• rotor dynamics
• Neumann expansion

Fuzzy and stochastic characteristics of parameters exist widely in rotating machinery. To research the parameters characteristics is of great significance in rotor dynamics. Dynamic characteristics of rotor system are analyzed taking into account uncertain properties of fuzzy and stochastic coexisting. Fuzzy variables are transformed into stochastic variables based on information entropy theory. The Neumann stochastic finite element method based on Neumann expansion combined with Newmark-beta method is used in linear and nonlinear rotor system within the frame work of Monte Carlo simulation. Critical speed and dynamic response of fuzzy stochastic rotor systems are described by the proposed method. The results show that the Neumann stochastic finite element method has good applicability and efficiency in rotor dynamics.

• 出版日期2014-6
• 单位东北大学