Investigation of the Vibration Transmission Characteristics of the Aero-Engine Casing System by Rotating Force Exciter

Jingming Zhao, Xiaolong Hao, Kai Zhang, Yuanyuan Li () and Guanghui Zhang
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Jingming Zhao: China Academy of Launch Vehicle Technology, Beijing 100076, China
Xiaolong Hao: China Academy of Launch Vehicle Technology, Beijing 100076, China
Kai Zhang: China Academy of Launch Vehicle Technology, Beijing 100076, China
Yuanyuan Li: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Guanghui Zhang: State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China

Energies, 2023, vol. 16, issue 4, 1-13

Abstract: This work aims to study the dynamic characteristics of an entire aero-engine casing by experiments using a new type of rotating exciter. New vibration sensor layout rules are proposed according to experimental results and vibration transmission characteristics. The vibration response of the aero-engine casing is carried out, and the vibration response of different casing measuring points is also studied. The finite element model of the engine casing’s structure is established to obtain the natural frequency of the whole aero-engine casing, which agrees well with the experimental measurement. We find that the vibration acceleration transmission value of the radial measuring point of bearing No. 1, but not the fan sensor, is more suitable for detecting the running state of the fan rotor. In addition, the sensor in the intermediate casing can detect the vibration of the high-pressure rotor. Bolt loosening of the flange has little effect on the vibration transmission characteristics of the casing. This work aims to provide experimental data of whole aero-engine vibration characteristics with a new rotating exciter for the vibration test, which can help optimize the location of the vibration transducer for the engine and the assembly technology design for the whole engine structure.

Keywords: vibration transmission; aircraft engine; casing system; rotating force exciter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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