Non-probabilistic analysis of a double-disk rotor system with uncertain parameters

Chao Fu, Xingmin Ren, Yongfeng Yang

Research output: Contribution to journalArticle

Abstract

Vibration is a major issue in rotor systems. Due to the presence of material property dispersions, manufacture or assembling errors and time-varying working status, rotor systems are always subject to uncertainties. The uncertainties should be taken into consideration to understand the dynamic characteristics of rotors more thoroughly. In this study, interval analysis is carried out to investigate the non-probabilistic characteristics of a double-disk rotor with uncertain parameters. The uncertainties are modeled as uncertain-but-bounded variables due to insufficient essential information to define their precise probabilistic distributions. The deterministic analysis model is derived by the finite element method (FEM). The accuracy and effectiveness of the proposed method in solving uncertain rotor problems are validated by comparative study with the Monte Carlo simulation (MCS). Several cases where different physical parameters are regarded as uncertain are investigated and the dynamic response bounds are obtained. Simulations suggest that uncertainties have significant influence on the dynamic characteristics of the rotor system. Multi-source uncertainties propagation can cause heavy vibrations in mechanical systems.

Original languageEnglish
Pages (from-to)1311-1321
Number of pages11
JournalJournal of Vibroengineering
Volume20
Issue number3
DOIs
Publication statusPublished - 15 May 2018
Externally publishedYes

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