Modeling and Contribution Analysis of Vibration Transfer Paths for a Dual-Rotor Aeroengine
Publication: Journal of Aerospace Engineering
Volume 37, Issue 6
Abstract
In order to study the vibration transfer characteristics of a dual-rotor aeroengine system, an aeroengine system dynamic model containing high- and low-pressure rotors as well as inner and outer casings is established. The Newmark- method is used to solve the developed model and obtain the dynamic characteristics of the system. This paper proposes a dynamic model and operational transfer path analysis (OTPA) method to analyze the vibration transfer path of a dual-rotor aeroengine system. The concept of insertion loss is introduced, and Cramer’s rule is used to improve the computational efficiency of dynamic equations for systems with variable stiffness and damping matrices. The vibration contribution of three vibration transfer paths is calculated separately. A dual-rotor–casing vibration transfer path test bench is built to make experimental research on vibration transfer characteristics and verify the accuracy of simulation results. The results indicated that among the three vibration transfer paths, the first vibration transfer path has the highest contribution to the vibration of the outer casing of the system. Due to the nonlinear superposition of responses, the overall response amplitude of the outer casing shows an increasing trend as the rotational speed ratio increases. The contribution rate of the three paths does not change with the rotational speed, and the vibration contribution of each path at different rotational speed ratios fluctuates slightly near the mean.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This paper is supported by National Natural Science Foundation of China (Grant No. 12172231), Liaoning Revitalization Talents Program (XLYC2203042), and Shenyang Young and Middle Aged Scientific and Technological Innovation Talents Support Plan (Grant No. RC220439). The fundamental research funds for the universities of Liaoning province. The authors would like to thank them.
Author contributions: Jing Tian: Research approach development, Dynamic model development. Cai Wang: Experiment design, Experiment process, Data analysis. Fengling Zhang: Writing–original draft. Yanting Ai: Experiment process, Data collection. Zhi Wang: Data analysis.
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Published In
Journal of Aerospace Engineering
Volume 37 • Issue 6 • November 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Nov 8, 2023
Accepted: May 7, 2024
Published online: Jul 24, 2024
Published in print: Nov 1, 2024
Discussion open until: Dec 24, 2024
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