Vibration Characteristics of a Dual-Rotor System with Non-Concentricity

A finite element model of an aero-engine dual-rotor system with intermediate bearing supported by six bearings is set up. Three modes of non-concentricity caused by the assembly process are defined, namely parallel non-concentricity, front deflection angle non-concentricity and rear deflection angle...

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Autores principales:	Shengliang Hou, Lei Hou, Shiwei Dun, Yufeng Cai, Yang Yang, Yushu Chen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	dual-rotor system non-concentricity in the assembly process finite element model vibration characteristics Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/f08ec11b5e7c40d9b1f5b7337c47c41a
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id	oai:doaj.org-article:f08ec11b5e7c40d9b1f5b7337c47c41a
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spelling	oai:doaj.org-article:f08ec11b5e7c40d9b1f5b7337c47c41a2021-11-25T18:12:01ZVibration Characteristics of a Dual-Rotor System with Non-Concentricity10.3390/machines91102512075-1702https://doaj.org/article/f08ec11b5e7c40d9b1f5b7337c47c41a2021-10-01T00:00:00Zhttps://www.mdpi.com/2075-1702/9/11/251https://doaj.org/toc/2075-1702A finite element model of an aero-engine dual-rotor system with intermediate bearing supported by six bearings is set up. Three modes of non-concentricity caused by the assembly process are defined, namely parallel non-concentricity, front deflection angle non-concentricity and rear deflection angle non-concentricity. The influence of the non-concentricity on the vibration characteristics of the dual-rotor system is investigated in detail. The results show that the parallel non-concentricity and the front deflection angle non-concentricity have a significant influence on the bending vibration modals of the high-pressure rotor and the low-pressure rotor, but have little influence on the local vibration modals of the rotors. With the increase in the magnitude of the non-concentricity, the natural frequencies of the bending modals decrease continuously, and the mode shapes of bending modals and that of local modals may be interchanged, leading to the emergence of bending modals in advance. Therefore, the key parameters to be controlled in the assembly process are the parallel non-concentricity and the front deflection angle non-concentricity. In order to prevent the bending modal of the dual-rotor system from appearing in advance, it is necessary to control the parallel non-concentricity within 2 mm and the front deflection angle non-concentricity amount within 0.18°.Shengliang HouLei HouShiwei DunYufeng CaiYang YangYushu ChenMDPI AGarticledual-rotor systemnon-concentricity in the assembly processfinite element modelvibration characteristicsMechanical engineering and machineryTJ1-1570ENMachines, Vol 9, Iss 251, p 251 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dual-rotor system non-concentricity in the assembly process finite element model vibration characteristics Mechanical engineering and machinery TJ1-1570
spellingShingle	dual-rotor system non-concentricity in the assembly process finite element model vibration characteristics Mechanical engineering and machinery TJ1-1570 Shengliang Hou Lei Hou Shiwei Dun Yufeng Cai Yang Yang Yushu Chen Vibration Characteristics of a Dual-Rotor System with Non-Concentricity
description	A finite element model of an aero-engine dual-rotor system with intermediate bearing supported by six bearings is set up. Three modes of non-concentricity caused by the assembly process are defined, namely parallel non-concentricity, front deflection angle non-concentricity and rear deflection angle non-concentricity. The influence of the non-concentricity on the vibration characteristics of the dual-rotor system is investigated in detail. The results show that the parallel non-concentricity and the front deflection angle non-concentricity have a significant influence on the bending vibration modals of the high-pressure rotor and the low-pressure rotor, but have little influence on the local vibration modals of the rotors. With the increase in the magnitude of the non-concentricity, the natural frequencies of the bending modals decrease continuously, and the mode shapes of bending modals and that of local modals may be interchanged, leading to the emergence of bending modals in advance. Therefore, the key parameters to be controlled in the assembly process are the parallel non-concentricity and the front deflection angle non-concentricity. In order to prevent the bending modal of the dual-rotor system from appearing in advance, it is necessary to control the parallel non-concentricity within 2 mm and the front deflection angle non-concentricity amount within 0.18°.
format	article
author	Shengliang Hou Lei Hou Shiwei Dun Yufeng Cai Yang Yang Yushu Chen
author_facet	Shengliang Hou Lei Hou Shiwei Dun Yufeng Cai Yang Yang Yushu Chen
author_sort	Shengliang Hou
title	Vibration Characteristics of a Dual-Rotor System with Non-Concentricity
title_short	Vibration Characteristics of a Dual-Rotor System with Non-Concentricity
title_full	Vibration Characteristics of a Dual-Rotor System with Non-Concentricity
title_fullStr	Vibration Characteristics of a Dual-Rotor System with Non-Concentricity
title_full_unstemmed	Vibration Characteristics of a Dual-Rotor System with Non-Concentricity
title_sort	vibration characteristics of a dual-rotor system with non-concentricity
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f08ec11b5e7c40d9b1f5b7337c47c41a
work_keys_str_mv	AT shenglianghou vibrationcharacteristicsofadualrotorsystemwithnonconcentricity AT leihou vibrationcharacteristicsofadualrotorsystemwithnonconcentricity AT shiweidun vibrationcharacteristicsofadualrotorsystemwithnonconcentricity AT yufengcai vibrationcharacteristicsofadualrotorsystemwithnonconcentricity AT yangyang vibrationcharacteristicsofadualrotorsystemwithnonconcentricity AT yushuchen vibrationcharacteristicsofadualrotorsystemwithnonconcentricity
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Vibration Characteristics of a Dual-Rotor System with Non-Concentricity

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