Dynamic characteristics of mistuned bladed disk system under rub-impact force
In order to study the rubbing of the mistuned bladed disk system with variable thickness blades, an elastically supported shaft-variable thickness blades coupled finite element model is established in this paper. A new rubbing force model is proposed considering the variable thickness section charac...
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2020-11-01
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Series: | Advances in Mechanical Engineering |
Online Access: | https://doi.org/10.1177/1687814020973064 |
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doaj-c90c7ee2eb864c5c839afe6d8402c4f52020-11-25T04:02:08ZengSAGE PublishingAdvances in Mechanical Engineering1687-81402020-11-011210.1177/1687814020973064Dynamic characteristics of mistuned bladed disk system under rub-impact forceHui Zhang0Tianyu Zhao1Hongyuan Zhang2Honggang Pan3Huiqun Yuan4School of Science, Northeastern University, Shenyang, ChinaKey Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang, ChinaSchool of Automobile and Traffic, Shenyang Ligong University, Shenyang, ChinaCollege of Energy and Power, Shenyang Institute of Engineering, Shenyang, ChinaSchool of Science, Northeastern University, Shenyang, ChinaIn order to study the rubbing of the mistuned bladed disk system with variable thickness blades, an elastically supported shaft-variable thickness blades coupled finite element model is established in this paper. A new rubbing force model is proposed considering the variable thickness section characteristics and rotation effect of the variable thickness blade. A method of mistuned parameter identification is introduced which consists of static frequency testing of blades, dichotomy, and finite element analysis. Based on the finite element method, the mistuned bladed disk system is made dynamic analysis in full rubbing by applying the judgment load method. The dynamic response of the mistuned bladed disk system is discussed under different conditions. The results show that increasing the amount of mistuning will increase the system vibration. At high speeds, the impact force will be partially offset by centrifugal force. And the rubbing gap affects the form of rubbing. With the gap decreases, the system will change from intermittent rubbing to continuous rubbing. In addition, when the system is rubbed, due to energy dissipation and blade damping, the stress is transferred from the blade tip to the blade root and attenuated. In general, rubbing is a random complex nonlinear vibration process.https://doi.org/10.1177/1687814020973064 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hui Zhang Tianyu Zhao Hongyuan Zhang Honggang Pan Huiqun Yuan |
spellingShingle |
Hui Zhang Tianyu Zhao Hongyuan Zhang Honggang Pan Huiqun Yuan Dynamic characteristics of mistuned bladed disk system under rub-impact force Advances in Mechanical Engineering |
author_facet |
Hui Zhang Tianyu Zhao Hongyuan Zhang Honggang Pan Huiqun Yuan |
author_sort |
Hui Zhang |
title |
Dynamic characteristics of mistuned bladed disk system under rub-impact force |
title_short |
Dynamic characteristics of mistuned bladed disk system under rub-impact force |
title_full |
Dynamic characteristics of mistuned bladed disk system under rub-impact force |
title_fullStr |
Dynamic characteristics of mistuned bladed disk system under rub-impact force |
title_full_unstemmed |
Dynamic characteristics of mistuned bladed disk system under rub-impact force |
title_sort |
dynamic characteristics of mistuned bladed disk system under rub-impact force |
publisher |
SAGE Publishing |
series |
Advances in Mechanical Engineering |
issn |
1687-8140 |
publishDate |
2020-11-01 |
description |
In order to study the rubbing of the mistuned bladed disk system with variable thickness blades, an elastically supported shaft-variable thickness blades coupled finite element model is established in this paper. A new rubbing force model is proposed considering the variable thickness section characteristics and rotation effect of the variable thickness blade. A method of mistuned parameter identification is introduced which consists of static frequency testing of blades, dichotomy, and finite element analysis. Based on the finite element method, the mistuned bladed disk system is made dynamic analysis in full rubbing by applying the judgment load method. The dynamic response of the mistuned bladed disk system is discussed under different conditions. The results show that increasing the amount of mistuning will increase the system vibration. At high speeds, the impact force will be partially offset by centrifugal force. And the rubbing gap affects the form of rubbing. With the gap decreases, the system will change from intermittent rubbing to continuous rubbing. In addition, when the system is rubbed, due to energy dissipation and blade damping, the stress is transferred from the blade tip to the blade root and attenuated. In general, rubbing is a random complex nonlinear vibration process. |
url |
https://doi.org/10.1177/1687814020973064 |
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