Experimental Study on Composite Acoustic Liner under Combined Acoustic and Static Loading

SONG Lekun; QU Chao; XI Yu; ZOU Xuefeng; YAN Qun

doi:10.7643/issn.1672-9242.2026.08.003

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Equipment Environmental Engineering ›› 2026, Vol. 23 ›› Issue (8) : 19-26. DOI: 10.7643/issn.1672-9242.2026.08.003

Special Topic——Comprehensive Environmental Strength Analysis and Testing Technology for Equipment

Experimental Study on Composite Acoustic Liner under Combined Acoustic and Static Loading

SONG Lekun, QU Chao, XI Yu, ZOU Xuefeng, YAN Qun

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Abstract

The work aims to investigate the effects of mean stress on the dynamic response and fatigue life of composite acoustic liner specimens under an acoustic environment. Response tests and fatigue tests were conducted on the composite acoustic liner specimens under combined acoustic and static loading. Based on a traveling wave tube test platform, two static loading methods were designed: chamber pressurization loading and loading block loading. The acoustic response characteristics and acoustic fatigue lives of the specimens under different static loading methods were compared and analyzed. The results showed that the dynamic response of the composite acoustic liner specimens under acoustic loading exhibited a linear trend. Both static loading methods increased the root mean square (RMS) value of the dynamic strain of the specimens in the acoustic environment. Among them, the specimens subjected to chamber pressurization loading exhibited the longest acoustic fatigue life, followed by those under noise loading only, while the specimens under loading block loading exhibited the shortest acoustic fatigue life. It is concluded that mean stress has a significant influence on the noise response and fatigue life of composite acoustic liners, and an appropriate static loading method should be designed based on actual load conditions to accurately simulate the real service environment.

Key words

mean stress / composite acoustic liner / combined acoustic and static loading / response characteristic / acoustic fatigue life

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SONG Lekun, QU Chao, XI Yu, ZOU Xuefeng, YAN Qun. Experimental Study on Composite Acoustic Liner under Combined Acoustic and Static Loading[J]. Equipment Environmental Engineering. 2026, 23(8): 19-26 https://doi.org/10.7643/issn.1672-9242.2026.08.003

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