Effect of SFD on rubbing-induced vibration characteristics in dual-rotor-blade-casing system

IF 1.9 3区工程技术 Q3 MECHANICS Meccanica Pub Date : 2024-11-08 DOI:10.1007/s11012-024-01903-1

Songtao Zhao, Ming Liu, Hui Ma, Hong Guan, Shan Chang, Xinxing Ma, Bangchun Wen

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Abstract

In a dual-rotor (DR)-blade-casing system, the squeeze film damper (SFD) plays a crucial role in vibration suppression to reduce the vibration level. This paper investigates the impact of SFD on the vibration responses, specifically considering blade-casing rubbing. The Timoshenko beam element is employed to simulate the casing and rotor, while the blade and disk are established using the lumped-mass element. A dynamic model of the DR-blade-casing system with SFD is then developed, incorporating the effects of rubbing. The influence of parameters such as unbalance and blade-casing clearance on the dynamic response is analyzed for systems with and without SFD. The results indicate that SFD effectively reduces the amplitude of the characteristic frequency corresponding to 4-blade rubbing. Additionally, the rubbing fault also induces the combined frequencies between rotating frequencies, integer frequencies, and fractional frequencies. These findings offer valuable insights for fault diagnosis and aero-engine system design.

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SFD对双转子-叶片-机匣系统摩擦激振特性的影响

在双转子-叶片-机匣系统中，挤压膜阻尼器在降低振动水平方面起着至关重要的作用。本文特别考虑了叶片-机匣摩擦对振动响应的影响。采用Timoshenko梁单元模拟机匣和转子，采用集总质量单元建立叶片和盘。在此基础上，建立了考虑摩擦影响的含SFD的dr -叶片-机匣系统动力学模型。分析了不平衡、叶片-机匣间隙等参数对系统动态响应的影响。结果表明，SFD有效地降低了四叶片摩擦对应的特征频率幅值。此外，摩擦故障还诱发了旋转频率、整数频率和分数频率的组合频率。这些发现为故障诊断和航空发动机系统设计提供了有价值的见解。

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来源期刊

Meccanica 物理-力学

CiteScore

4.70

自引率

3.70%

发文量

151

审稿时长

7 months

期刊介绍： Meccanica focuses on the methodological framework shared by mechanical scientists when addressing theoretical or applied problems. Original papers address various aspects of mechanical and mathematical modeling, of solution, as well as of analysis of system behavior. The journal explores fundamental and applications issues in established areas of mechanics research as well as in emerging fields; contemporary research on general mechanics, solid and structural mechanics, fluid mechanics, and mechanics of machines; interdisciplinary fields between mechanics and other mathematical and engineering sciences; interaction of mechanics with dynamical systems, advanced materials, control and computation; electromechanics; biomechanics. Articles include full length papers; topical overviews; brief notes; discussions and comments on published papers; book reviews; and an international calendar of conferences. Meccanica, the official journal of the Italian Association of Theoretical and Applied Mechanics, was established in 1966.