Study on vibro-acoustic performance of composite laminates under transient impact excitation. (1st March 2023)

• Record Type: Journal Article
• Authors: Wang, Hongfu; Guo, Hanhui; Wang, Yu; Du, Yuan; Cai, Wangqiu
• Is Part Of: Journal of physics. Volume 2458(2023)
• Publication Date: 2023-03-01
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/2458/1/012006
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: With the widespread use of composite structures in ship superstructures, their vibro-acoustic response under transient impact loads is of increasing concern. This paper studies the vibro-acoustic behavior of a carbon fibre reinforced composite laminate under transient impact excitation based on the time-domain hybrid FEM/BEM method. Firstly, the numerical method is verified through the model test of a homogeneous plate. Subsequently, the vibration and sound radiation characteristics of composite laminates are studied. It was found that the impact noise energy mainly concentrated in the low-frequency range of 10~200Hz, and the peak noise spectrum was 9dB lower than that of the steel plate. The variation of lay-up orientations causes differences in the structural properties of the laminates, resulting in differences in their vibro-acoustic radiation performance. In this study, the laminate with the [0°/90°]5s orthogonal lay-up scheme has better acoustic radiation performance under the impact load.