基于多重散射理论的消声瓦吸声机理研究  

Study on the acoustic-absorption mechanism of anechoic tile with multiple-scattering theory

作　　者：商超[1] 魏英杰[1] 张嘉钟[1] 曹伟[1] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001

出　　处：《船舶力学》2013年第5期576-582,共7页Journal of Ship Mechanics

摘　　要：基于多重散射理论研究了含周期球腔消声瓦的吸声机理。分析了球腔大小、位置及组合对消声瓦吸声性能的影响,讨论了消声瓦弯曲振动吸声和径向振动吸声两种吸声机制及其发挥作用时的工况。通过合理搭配球腔的大小和位置,设计了含多层球腔的薄层消声瓦。结果表明,该消声结构在阻尼水平不高的情况下,在全频段上仍具有优良的吸声性能。Using the multiple-scattering riodically distributed ball cavities is inv theory, the acoustic absorption mechanism of anechoic tile with peestigated. The influence of size, location and combination of the ball cavities on the acoustic absorption performance of anechoic tile is analyzed respectively. The bending vibration absorption mechanism and radial vibration absorption mechanism and their working conditions are discussed. A thin layer of anechoic tile with multilayer ball cavities is designed by reasonable collocation of their sizes and locations. The results show that this anechoic tile structure still has excellent anechoic performance in full frequency under the condition of low damping level.

关 键 词：多重散射理论 消声瓦 吸声机理 

分 类 号：TB535.1[理学—物理]