CAJ | 학술논문

利用二维声子晶体缺陷与自准直模式的耦合，设计2种线缺陷结构，实现自准直声波分束，并采用有限元数值模拟软件对其进行仿真。仿真结果表明，改变线缺陷中散射体的半径和线缺陷的大小，就能够改变反射和透射波束的能量比例，从而实现可控分束，将分束装置串联还可以实现多路可控分束。
이용이유성자정체결함여자준직모식적우합，설계2충선결함결구，실현자준직성파분속，병채용유한원수치모의연건대기진행방진。방진결과표명，개변선결함중산사체적반경화선결함적대소，취능구개변반사화투사파속적능량비례，종이실현가공분속，장분속장치천련환가이실현다로가공분속。
Two kinds splitting schemes for self‐collimated acoustic beam are designed based on the cou‐pling between defect modes and self‐collimated modes in sonic crystals .The schemes are verified numeri‐cally by the finite element method .Controllable energy distribution can be achieved in our schemes as the ratio of energy between reflected and transmitted beams can be regulated freely by changing the defect size .By concatenating and expanding the designed structures ,multichannel splitting can also be achieved which can be widely used in the integrated acoustic devices .