Numerical Study of Vibro-Acoustic Performance of Composite and Sandwich Shells with Viscoelastic Core

摘要：

　　In order to effectively evaluate the acoustic vibration characteristics of viscoelastic sandwich composite cylindrical shell, based on FEM and BEM method, the vibration acoustic radiation of the viscoelastic sandwich panel and metal shell are calculated, and the results agree well with the experimental results.The dynamic mechanical parameters of viscoelastic core are obtained by dynamic thermodynamic experiments and the equivalent principle of temperature and frequency.The finite element method is used to simulate the coupling of water and shell.Finally, the indirect boundary method is used to calculate the radiated sound field under point excitation and the results show that the average and peak value of the acoustic power of the viscoelastic sandwich composite shell is 21.2dB and 46.4dB lower than that of the steel shell.In the range of low frequency, the radiation sound power is sensitive to the change of the layer angle, which is opposite in the range of high frequency.In the range of high frequency, the shear loss of the viscoelastic core is relatively obvious, which is opposite in the range of low frequency.

关键词： Viscoelastic material Composite sandwich shell Finite element method Boundary element method Vibro-acoustic

作者: Bo Tong Xi Zhu Yong-qing Li Yan-bing Zhang

作者单位: Dept.of Naval Architecture Engineering, Naval University of Engineering, Wuhan 430033, China

会议类型: 国际会议

会议名称: The 2016 China Functional Materials Technology and Industry Forum (2016中国国际功能材料大会暨第九届中国功能材料及其应用学术会议)

会议地点: 重庆

会议语种:英文

页码: 249-256

在线出版日期: 2016-07-25（万方平台首次上网日期，不代表论文的发表时间）