Analysis on high-frequency vibration characteristics of complex blades under ultrasonic excitation

Jia Wei Chen; Wei Zhang; Guang Jie Kou; Jun Ling Xiao; Jin Shu Chen; Zheng Wei Yang

doi:10.1117/12.2673939

6 April 2023 Analysis on high-frequency vibration characteristics of complex blades under ultrasonic excitation

Jia Wei Chen, Wei Zhang, Guang Jie Kou, Jun Ling Xiao, Jin Shu Chen, Zheng Wei Yang

Proceedings Volume 12615, International Conference on Signal Processing and Communication Technology (SPCT 2022); 126150Q (2023) https://doi.org/10.1117/12.2673939
Event: International Conference on Signal Processing and Communication Technology (SPCT 2022), 2022, Harbin, China

Abstract

The high cycle fatigue of aero-engine blades is mainly vibration bending fatigue. To study the high-frequency vibration characteristics of the blade under actual working conditions, the high-frequency vibration characteristics test of the blade under ultrasonic excitation was carried out by using the horn-blade ultrasonic excitation laser vibrometry system and analyzing the blade high-frequency vibration characteristics. The results show that the ultrasonic generator can produce stable 20k Hz ultrasonic vibration, and the laser vibration measurement system can accurately measure the high-frequency vibration. Due to the structure shape of the complex blade, there is energy dissipation, which results in the blade amplitude being much smaller than the excitation source amplitude. Under the same excitation position and ultrasonic excitation conditions, the smaller the blade mass can cause the larger the amplitude, the higher the number of high harmonics, the lower the fundamental frequency, and the more complex the vibration waveform. The research provides a test method for the analysis of the blade high-frequency vibration characteristics and has a certain guiding significance for the research on the blade ultra-high cycle fatigue.

Citation Download Citation

Jia Wei Chen, Wei Zhang, Guang Jie Kou, Jun Ling Xiao, Jin Shu Chen, and Zheng Wei Yang "Analysis on high-frequency vibration characteristics of complex blades under ultrasonic excitation", Proc. SPIE 12615, International Conference on Signal Processing and Communication Technology (SPCT 2022), 126150Q (6 April 2023); https://doi.org/10.1117/12.2673939

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KEYWORDS

Vibration

Material fatigue

Laser ultrasonics

Frequency response

Ultrasonics

Laser frequency

Vibrometry

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