带中介轴承的双转子系统振动耦合作用评估

doi:10.7527/S1000-6893.2020.24065

固体力学与飞行器总体设计

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带中介轴承的双转子系统振动耦合作用评估

王杰¹, 左彦飞¹, 江志农², 冯坤³

1. 北京化工大学发动机健康监控及网络化教育部重点实验室, 北京 100029;
2. 北京化工大学高端机械装备健康监控与自愈化北京市重点实验室, 北京 100029;
3. 中国航发动力所-北京化工大学航空发动机振动健康监控联合实验室, 北京 100029

收稿日期:2020-04-06 修回日期:2020-05-03 出版日期:2021-06-15 发布日期:1900-01-01
通讯作者: 左彦飞 E-mail:zuo_yanfei@163.com
基金资助:
国家自然科学基金青年科学基金（51905025）

Evaluation of vibration coupling effect of dual-rotor system with intershaft bearing

WANG Jie¹, ZUO Yanfei¹, JIANG Zhinong², FENG Kun³

1. Key Lab of Engine Health Monitoring-Control and Networking of Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China;
2. Beijing Key Laboratory of High-end Mechanical Equipment Health Monitoring and Self-Recovery, Beijing University of Chemical Technology, Beijing 100029, China;
3. China Aero Engine Vibration Health Monitoring-Control Joint Lab, AVIC Shenyang Engine Design Institute-Beijing University of Chemical Technology, Beijing 100029, China

Received:2020-04-06 Revised:2020-05-03 Online:2021-06-15 Published:1900-01-01
Supported by:
National Natural Science Foundation of China (51905025)

摘要/Abstract

摘要： 为了评估中介轴承对双转子系统的振动耦合作用，从临界转速位置振型变化、临界转速变化、模态振型与稳态不平衡响应的应变能分布变化、中介轴承受力变化等多角度，阐释双转子耦合振动的表现形式和关联关系，提出了相应的评价指标或评估方法，并以典型燃气涡轮发动机双转子系统为对象，进行了分析评估。结果表明，单转子的模态振型可能在双转子模态振型中表现为3种形式，一一对应出现、重复出现或耦合出现，对应的临界转速及应变能分布也会随之产生相应的变化；中介轴承受力在临界转速位置出现峰值，而应变能分布变化最大的转速位置与系统临界转速位置不一致，同时还受不平衡激励位置影响；各单元应变能占比变化量随转速变化曲线可详细分析特定不平衡激励下系统应变能分布变化情况。所提方法可为双转子-中介轴承系统的设计、故障诊断提供参考。

关键词: 双转子, 中介轴承, 耦合作用, 振型置信因子, 应变能占比变化量

Abstract: To evaluate the vibration coupling effect of the intershaft bearing on the dual-rotor system, this paper illustrates the expressions and relations of the coupling vibration of the two rotors and proposes the corresponding evaluation indexes or methods, from the perspectives of the mode shape change at the critical speed, the critical speed change, the change of the strain energy distribution between the mode shape and the steady-state unbalanced response, and the change of the bearing force of the intermediate shaft. The typical dual-rotor system of gas turbine engines is analyzed and evaluated. The results show that the mode shapes of single rotors may appear in three forms in the dual-rotor mode shapes:one-to-one corresponding, repeated, or coupled. The corresponding critical speed and strain energy distribution will also change accordingly. The peak value of the intermediate shaft bearing force appears at the critical speed position, while the speed position with the largest change of strain energy distribution is not consistent with the critical speed position of the system, and is affected by the unbalanced excitation position. The curve of the strain energy ratio of each element with the change of rotating speed can analyze the change of strain energy distribution of the system under the specific unbalanced excitation. The method can be used as a reference for the design and fault diagnosis of the dual-rotor intershaft bearing system.

Key words: dual-rotor, intershaft bearing, coupling effect, mode assurance criteria, strain energy ratio change

中图分类号:

V231.96

王杰, 左彦飞, 江志农, 冯坤. 带中介轴承的双转子系统振动耦合作用评估[J]. 航空学报, 2021, 42(6): 224065-224065.

WANG Jie, ZUO Yanfei, JIANG Zhinong, FENG Kun. Evaluation of vibration coupling effect of dual-rotor system with intershaft bearing[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(6): 224065-224065.

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带中介轴承的双转子系统振动耦合作用评估

Evaluation of vibration coupling effect of dual-rotor system with intershaft bearing

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