%0 Journal Article
%T Mechanism of broad acoustic band-gap in the three-component composite<br>三元周期结构声禁带形成机理
%A Hua Ji
%A Zhang Shu
%A Cheng Jian-Chun
%A <br>华 佳
%A 张 舒
%A 程建春
%J 物理学报
%D 2005
%I 
%X Mechanism of broad acoustic band_gap in the two_dimensional three_component composite is investigated by calculating acoustic transmission spectra and acoustic fields for different inserted steel rows embedded in epoxy resin matrix with or without rubbers as the coating material. By comparing the acoustic fields inside the two_ and three_component crystal slabs, one can conclude that the broad acoustic band_gap in the three_component crystal slab is formed by the coexistence of the Bragg reflection of a periodic structure and the localized resonance in the soft rubber. The former is evidence in higher frequency and the latter is dominant in lower frequency with the wavelength longer than that of the coating layer.
%K three-component composite
%K acoustic bandgap
%K localized resonance
%K Bragg reflection<br>三元周期结构，
%K 声禁带，
%K 局域共振，
%K Bragg反射
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=E843CD862B481B13&yid=2DD7160C83D0ACED&vid=318E4CC20AED4940&iid=38B194292C032A66&sid=4AECDC3329847C4A&eid=F58A98E9A761BF85&journal_id=1000-3290&journal_name=物理学报&referenced_num=5&reference_num=13