Transmission loss analysis for composite laminates based on two-dimensional equivalent hybrid FE-SEA method

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (11) : 226-231.

WANG Chen, YAN Qun, ZHOU Hongwei, MU Qinqin

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Abstract

In order to study the transmission loss of composite laminates under turbulent pulsating noise excitation. Firstly, the composite laminates are equivalent to a single-layer isotropic panel based on general laminate theory, and the hybrid FE-SEA method is used to research the transmission loss of composite laminates. At the same time, the transmission loss experiment is carried out, and the results of hybrid FE-SEA method are compared with SEA and experimental results. The results showed that the hybrid FE-SEA results are consistent with the distribution trend of experimental results and the error is relatively small. The error of 3000Hz~10000Hz is within 2dB, but the equivalent of stiffness leads to a relatively large error around 2000Hz. Compared with the SEA method, the hybrid FE-SEA method comprehensively considers the boundary conditions and the detailed geometric features of the composite laminates. It can not only accurately calculate the inherent characteristics of the composite laminates, but also make the results of transmission loss well consistent with the experimental values in the whole frequency band. Therefore, the two-dimensional equivalent FE-SEA hybrid model established in this paper can accurately predict the transmission loss of composite laminates under turbulent pulsating noise excitation.

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turbulent pulsating noise / composite laminates / hybrid FE-SEA method / equivalent stiffness / transmission loss

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WANG Chen, YAN Qun, ZHOU Hongwei, MU Qinqin. Transmission loss analysis for composite laminates based on two-dimensional equivalent hybrid FE-SEA method[J]. Journal of Vibration and Shock, 2020, 39(11): 226-231

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