Two-dimensional ternary locally resonant phononic crystals with a comblike coating

Yan-Feng Wang, Yue-Sheng Wang, Litian Wang
2013 Journal of Physics D: Applied Physics  
Two-dimensional ternary locally resonant phononic crystals used to consist of cylindrical scatterers with uniform coatings in their exterior. An alternative coating scheme with a comblike profile is proposed and investigated in this letter. The band structures are calculated by using the finite element method. It is found that a complete bandgap at a significantly low frequency can be induced. The mechanism for such a change is suggested by using an equivalent spring-mass model based on
more » ... g the eigen modes at the bandgap edges. Consistent results are obtained from the numerical results and the analysis of the spring-mass model.
doi:10.1088/0022-3727/47/1/015502 fatcat:glzf223ppbdaziqxkatam4l7ga