摘要
利用有限元软件ANSYS和边界元软件SYSNOISE对水下弹性壳体在不同阻尼处理下受激振动与声辐射特性作了数值计算分析研究,讨论了粘弹性阻尼厚度及敷设方式对水下弹性壳体振动声辐射特性的影响,研究表明:阻尼处理可以有效的降低结构的辐射声功率,阻尼层的厚度不是越厚越好,要结合激励力的频谱特性和壳体的振动特性来选择合适的厚度,敷设方式内粘自由阻尼层要比外粘减振效果好。
The numerical analysis of sound and vibration from a submerged cylindrical shell coated with different viscoelastic layer have been carried out by using FEM software ANSYS and BEM software SYSNOISE. Numerical results are given that the influence of different viscoelastic layer on the vibro-acoustics behavior of the structure. It is shown that the viscoelastic layer can reduce the sound radiation of the structure. It can obtain better effect on sound radiation reduction of the structure by choosing appropriate thickness of the layer, The vibration reduction with viscoelastic layer coated inside the shell is better than that with viscoelastic layer coated outside the shell.
出处
《噪声与振动控制》
CSCD
北大核心
2006年第3期49-51,54,共4页
Noise and Vibration Control
基金
国家自然科学基金(50375121)
国家自然科学基金(10574105)
西工大种子基金(M016628)资助
关键词
声学
阻尼
振动
声辐射
弹性壳体
acoustics
damp
vibration
acoustic radiation
elastic shell
