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Date of Publication:2017-01-01

Journal:噪声与振动控制

Issue:4

Page Number:34-39,68

ISSN No.:1006-1355

Abstract:The acoustic performance of a honeycomb sandwich panel is studied by numerical simulation. Based on the acoustic indirect boundary element theory, a 3D model is established and then modal analysis is conducted with the help of finite element software Patran. To obtain the sound pressure distribution, sound pressure level difference and transmission loss of the panel, the acoustic software Virtual. Lab Acoustics is used in the process of the acoustic performance calculation. On this basis, the influences of the face thickness and density, the thickness of the core, the thickness and the length of the honeycomb wall on the sound transmission loss are analyzed systematically. The results indicate that the face thickness and the core thickness play a significant role in the acoustic performance of the honeycomb sandwich panel in low frequency range, especially in the stiffness control area.

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