摘要
在理论研究基础上,对管阵列的声透射特性进行了实验研究,通过改变实验中管阵列的排数、纵向节距以及环境温度等参数,得到管阵列声压级插入损失与管阵列参数的关系,并与根据平面波展开法的计算结果以及Comsol软件仿真结果进行了对比.结果表明:实验所得声透射带隙波段与理论计算结果相互吻合,并发现了在"阻声带隙"中有时存在"透明带隙"的实验现象.
Based on analysis of phononic crystal theory, experimental studies were conducted to sound transmission across tube arrays with different tube rows and pitch sizes at different environmental tempera- tures, so as to analyze the relationship between sound pressure level （SPL） insertion loss and the structur- al parameters of tube array. Above results were compared with those obtained by plane wave expansion method and Comsol software simulation. Results show that the band gaps of sound transmission obtained in the experiment agree well with those by theorectic calculations, and sometimes, “transparent gaps” may be observed in the “stop gaps”.
出处
《动力工程学报》
CAS
CSCD
北大核心
2015年第3期197-204,共8页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(11274111
11474091)
河北省自然科学基金资助项目(A2015502077)
关键词
管阵列
声子晶体
带隙结构
实验测量
tube array
phononic crystal
band-gap structure
experimental study
