PROPAGATION OF ACOUSTIC WAVE IN ONE-DIMENSIONAL PHONONIC CRYSTALS WITH MAGNETORHEOLOGICAL FLUIDS

摘要：

In this paper we present a kind of phononic crystals(PCs) with magnetorheological fluids(MRFs) and its band gaps can be tuned by the magnetic field for the reason that modulus of MRFs can be changed by means of the magnetic field.Finite element method and experimental method are applied to study the propagation of acoustic waves in the PC.Firstly,we obtain the variety of the shear storage modulus and the loss modulus of MRFs under different magnetic flux density.Secondly,relationships between the magnetic flux density and band gaps of the PC are achieved.We find that band gaps change in response to the magnetic field at first,but they keep constant when MRFs reach magnetic saturation state.The results demonstrate the feasibility of tuning band gaps by MRFs with changed magnetic field.

关键词： Phononic crystal MRF Band gaps Finite element method

作者: Xiao-lei LI Jian-ke DU Ji WANG

作者单位: School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China

会议类型: 国际会议

会议名称: The 2016 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2016全国压电和声波理论及器件技术研讨会)

会议地点: 西安

会议语种:英文

页码: 235-238

在线出版日期: 2016-10-21（万方平台首次上网日期，不代表论文的发表时间）