探讨周期性结构障碍物的声传播和透射  

Acoustic propagating and transmission through periodical obstacle

作　　者：邢月[1] 朱哲远 苏为宁[1] 

机构地区：[1]南京大学物理学院,江苏南京210093

出　　处：《大学物理》2015年第4期61-65,共5页College Physics

基　　金：国家基础科学人才培养基金项目(0204G088)资助;南京大学物理本科人才科研训练及科研能力项目(0204131631)资助;江苏高校优势学科建设工程项目资助

摘　　要：构建了具有周期性结构的一维狭缝障碍屏,用Comsol Multiphysics模拟计算,在较长波段内讨论声波的透射现象.并改变障碍屏的参数,对比不同情况下的声透射,在理论上分析声波的传播过程和透射特征,对照和分析通过Comsol Mul-tiphysics计算的透射谱,说明了声波透射峰的起源和异常透射现象.We establish a periodical obstacle with 1D grating as an acoustic model and simulate with Comsol Muhiphysics. The acoustic wave propagating though obstacle during a long period of wavelength is also discussed. We change the parameters of the obstacles and have some comparison with the acoustic field and transmission. A- nalysis of the sound wave propagation and transmission characteristics with theory are performed. We compare and analyze the transmission calculated by Comsol Multiphysics to illustrate the origin of the acoustic transmission peaks and the abnormal phenomenon of transmission.

关 键 词：狭缝 透射 驻波 FP共振 

分 类 号：O422.5[理学—声学]