基于统计能量法的铝板隔声量分析  

Sound insulation performance analysis of various aluminum plate based on SEA

作　　者：张波[1,2] 向阳[1,2] 郭宁[1,2] 

机构地区：[1]武汉理工大学能源与动力工程学院,武汉430063 [2]船舶动力系统运用技术交通行业重点实验室,武汉430063

出　　处：《应用力学学报》2017年第4期721-727,共7页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(51079118;51279148);武汉理工大学自主创新研究基金(175205008)

摘　　要：为研究单双层铝板的隔声性能,基于VA-ONE平台建立了单双层铝板隔声计算模型,利用统计能量法对其进行高频段的隔声量仿真计算,并与实测值进行了对比,在125Hz^4000Hz频域内,统计能量法的隔声量计算值与实测数据基本吻合。进一步研究了板厚、材质、空气夹层厚度、吸声材料对单双层铝板隔声性能的影响。研究结果表明:不同厚度单层均质铝板隔声量基本符合均质板的隔声规律;在630Hz^4000Hz频域内,空气夹层厚度每增加50mm,隔声量提高约1dB;等厚度玻璃钢及铝蜂窝板比铝板具有更好的隔声性能;在对能量输入贡献较大的结构中铺设吸声性能较好的材料可以获得更好的隔声效果;玻璃纤维能够增强聚氨酯的吸声性能。实际工程中,需合理配置板厚、空气夹层厚度、隔板材料、吸声材料的关系,方可获得较好的隔声性能和经济性,研究结果对船舶舱室降噪设计提供了参考依据。In order to research the insulation performance of single and double layer aluminum plates, the insulation calculation models are established by VA-ONE. Based on statistical energy method, single and double layer aluminum plate sound insulation are calculated and compared with measured values within high frequency range. Within the frequency range of 125 Hz^4000 Hz, the sound transmission loss of the model forecast is consistent with experimental data. The influences of plate thickness, material type, air layer thickness and sound absorption material on sound insulation performance are further researched. The results show that the sound transmission loss of different thickness of single-layer homogeneous aluminum plates agrees with the acoustic law of homogeneous plate. Within the frequency range of 630 Hz^4000 Hz, the sound transmission loss can be increased by 1 dB as the thickness of the air layer is increased by 50 mm. Fiber reinforced plastic and aluminum honeycomb panel can get better sound insulation performance than homogeneous aluminum plate under the equal thickness. Laying absorption material in the larger power contribution structure can get better sound insulation. Fiber glass can enhance the sound absorption performance of polyurethane. In the practical engineering, allocating the relation of thickness, air layer thickness, clapboard material and absorption material reasonably, good sound insulation effect and better economy can be obtained. The results obtained can be applied to cabin noise reduction design.

关 键 词：铝板 隔声量 统计能量法 空气夹层 吸声材料 

分 类 号：O42[理学—声学] O429[理学—物理]