文章摘要
张荣英,姜根山,王璋奇,吕亚东.声子晶体的研究进展及应用前景[J].声学技术,2006,(1):35~42
声子晶体的研究进展及应用前景
Progress in researches of phononic crystal and the application perspectives
投稿时间:2005-05-13  修订日期:2005-10-12
DOI:
中文关键词: 声子晶体  声子禁带  局域态  声学滤波器  隔振降噪
英文关键词: phononic crystals  phononic band gap  localization state  acoustical filer  vibration controlling and noise reducing
基金项目:中国科学院声学研究所“声场声信息国家重点实验室”开放基金资助课题(2005006);华北电力大学重大项目预研基金资助课题(93410301)
作者单位
张荣英 华北电力大学, 保定, 071003 
姜根山 华北电力大学, 保定, 071003 
王璋奇 华北电力大学, 保定, 071003 
吕亚东 中国科学院声学研究所, 北京, 100080 
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中文摘要:
      声子晶体是近10年来提出的一类概念、声学材料,这种周期性结构所具有的声波带隙特性可以认为具有某种过滤效应,即当多种频率的振动或声波通过此类晶体时,由于布拉格散射,便会分裂为导带和禁带,处于禁带频率范围内的振动或声波将被禁止在晶体中传播,而处于导带频率范围内的振动或声波则能顺利通过声子晶体。通过求解声波在晶体中的波动方程可以设计所需要的声子禁带和导带。文中对声子晶体的概念和基本特征、研究进展、理论方法、潜在应用等方面进行了阐述,并对声子晶体的研究工作进行了展望。
英文摘要:
      Phononic crystals are conception and acoustic materials appeared ten years ago.This kind of periodical structure can be considered as having the function of filtration,i.e.,the crystal breaks into pass-bands and band-gaps due to Prague scatter when vibration or sound with multiple frequencies is transmitted through it.Propagation of vibration and sound in the band-gap is not allowed.On the contrary,other frequency components can pass the crystal freely.Positions of band-gaps and pass-bands can be engineered by evaluating the acoustic wave equations in the crystals.In addition,existence of the band-gaps is closely associated with the Anderson localization of phonons in inhomogeneous media.The concepts,basic features,development,theoretical methods,and potential applications are discussed.
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