CAJ | 학술논문

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.
기우다중산사이론연구료함주기구강소성와적흡성궤리.분석료구강대소、위치급조합대소성와흡성성능적영향,토론료소성와만곡진동흡성화경향진동흡성량충흡성궤제급기발휘작용시적공황.통과합리탑배구강적대소화위치,설계료함다층구강적박층소성와.결과표명,해소성결구재조니수평불고적정황하,재전빈단상잉구유우량적흡성성능.
Using the multiple-scattering theory, the acoustic absorption mechanism of anechoic tile with pe-riodically distributed ball cavities is investigated. The influence of size, location and combination of the ball cavities on the acoustic absorption performance of anechoic tile is analyzed respectively. The bending vi-bration 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 per-formance in full frequency under the condition of low damping level.