摘要
为改善静水压力作用下传统声学覆盖层的吸声性能,提出了将金属孔板插入传统声学覆盖层中的水下声学覆盖层结构。以静力学方法研究了该声学覆盖层结构在不同静水压力下的形变情况。通过建立静水压力作用下的声学有限元方程,分析了该声学结构在不同静水压力下的吸声效果。与传统声学覆盖层相比,在静水压力为0~6 MPa时,该声学结构在中、高频段获得了更好的宽频吸声效果。此外,还讨论孔板厚度、孔板材料及孔板孔隙率对该声学结构吸声性能的影响。研究表明设计含金属孔板声学覆盖层可有效改善静水压力条件下水下声学结构的吸声性能。
An underwater acoustic structure with metal perforated plate inserted into the traditional anechoic coating is proposed to improve the pressure resistance and sound absorption performance of the structure.The deformation of the acoustic structure under different hydrostatic pressure is studied by the static method.By establishing the acoustic finite element equation under the action of hydrostatic pressure,the sound absorption effect of the acoustic structure under different hydrostatic pressure is analyzed.Com⁃pared with the traditional anechoic coating,under the hydrostatic pressure of 0 to 6 MPa,the acoustic structure achieves better broadband sound absorption in the mid-to-high frequency range.In addition,the effects of the thickness,material and porosity of the metal perforated plate on the sound absorption performance of the acoustic structure are discussed.The research shows that the underwater anechoic coating with metal perforated plate is an effective design to improve the pressure resistance and sound absorp⁃tion performance of underwater acoustic structure.
作者
贾薪宇
靳国永
叶天贵
闫燕
JIA Xin-yu;JIN Guo-yong;YE Tian-gui;YAN Yan(College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2024年第7期1211-1220,共10页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(52225109,52241101,52271309)
黑龙江省自然科学基金资助项目(YQ2022E104)
哈尔滨工程大学博士科创基金资助项目(3072023GIP0302)。
关键词
声学覆盖层
金属孔板
静水压力
形变
吸声性能
anechoic coating
metal perforated plate
hydrostatic pressure
deformation
sound absorption performance
