Response analysis of an accelerating unbalanced rotating system with both random and interval variables

Chao Fu, Yuandong Xu, Yongfeng Yang, Kuan Lu, Fengshou Gu, Andrew Ball

Research output: Contribution to journalArticle

Abstract

This paper investigates the accelerating up transient vibrations of a rotor system under both the random and uncertain-but-bounded parameters. The Polynomial Chaos Expansion (PCE) coupled with the Chebyshev Surrogate Method (CSM) is used to analyses the propagations of the two categorizes of uncertainties. The output responses will possess the characteristics of both bounded quantities and statistical moments. As a hybrid non-intrusive uncertainty quantification (UQ) procedure, the deterministic rotor model is taken as a black box and will only be executed at some parameter points. A number of uncertain physical parameters are studied and the corresponding transient responses are presented. The accuracy and efficiency are verified by the Monte Carlo simulations (MCS) in combination with the scanning scheme and also other hybrid analysis framework. It will provide guidance for the accurate transient dynamic analysis of engineering problems with hybrid uncertainties.

Original languageEnglish
Article number115047
Number of pages15
JournalJournal of Sound and Vibration
Volume466
Early online date31 Oct 2019
DOIs
Publication statusE-pub ahead of print - 31 Oct 2019

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random variables
intervals
rotors
Rotors
distribution moments
transient response
Transient analysis
Chaos theory
Dynamic analysis
boxes
chaos
polynomials
Polynomials
engineering
Scanning
moments
vibration
expansion
scanning
propagation

Cite this

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abstract = "This paper investigates the accelerating up transient vibrations of a rotor system under both the random and uncertain-but-bounded parameters. The Polynomial Chaos Expansion (PCE) coupled with the Chebyshev Surrogate Method (CSM) is used to analyses the propagations of the two categorizes of uncertainties. The output responses will possess the characteristics of both bounded quantities and statistical moments. As a hybrid non-intrusive uncertainty quantification (UQ) procedure, the deterministic rotor model is taken as a black box and will only be executed at some parameter points. A number of uncertain physical parameters are studied and the corresponding transient responses are presented. The accuracy and efficiency are verified by the Monte Carlo simulations (MCS) in combination with the scanning scheme and also other hybrid analysis framework. It will provide guidance for the accurate transient dynamic analysis of engineering problems with hybrid uncertainties.",
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Response analysis of an accelerating unbalanced rotating system with both random and interval variables. / Fu, Chao; Xu, Yuandong; Yang, Yongfeng; Lu, Kuan; Gu, Fengshou; Ball, Andrew.

In: Journal of Sound and Vibration, Vol. 466, 115047, 03.02.2020.

Research output: Contribution to journalArticle

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T1 - Response analysis of an accelerating unbalanced rotating system with both random and interval variables

AU - Fu, Chao

AU - Xu, Yuandong

AU - Yang, Yongfeng

AU - Lu, Kuan

AU - Gu, Fengshou

AU - Ball, Andrew

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