2、振动试验对其振动传输特性进行了测试,试验结果同理论分析结果基本吻合。这为声子晶体复杂梁杆结构的带隙特性研究及减振降噪设计提供了新的、简化的思路。关键词:声子晶体振动带隙晶格对称性原胞中图分类号:O321 TH113O48Research ontheBandedge Modes ofVibration Band Gaps of Onedimensional Phononic CrystalsCAILi HAN Xiaoyun WEN Xisen (College of Mechatronics Engineering andAutomation,National University of D
3、efense Technology, Changsha410073)Abstract:Basedon thewaveequation ofonedimensionalphononiccrystals,astudyisperformedforthebandgap characteristics through theanalysis ofthe symmetricalprimitive cellsin phononiccrystals.Ithasbeenfound thebandedgemodesare the sameas thenaturalresonantmodesofthe symme
4、tricalprimitive cells.Therefore the studyon the band gap characteristics can be simplified intothestudyon the symmetricalprimitive cells.Ithasbeen found the vibration modesofthe 1Dphononiccrystalsare the coupling modesofthenaturalmodesofvarious symmetricalprimitive cells.There isuncouplingeffects a