Tuning characteristics of bandgap in a stub phononic crystal plate with slit and slider structure

Abstract

In the work, the adjustable characteristics of bandgaps in a stub phononic crystal plate with slit and slider structure are studied. Using the finite element method, we calculated the dispersion relations and the power transmission spectra and the displacement fields of the eigenmodes. The influence of the position and material of sliders on bandgaps is investigated. Numerical results show that the position and width of bandgaps can be adjusted by altering the position and material of sliders. The bandgap frequency between third and fourth bands is not sensitive to the synchronously variation of position for four sliders, and the bandgap frequency between fifth and six bands first increase and then decrease as the synchronously variation of position for four sliders. In addition, the material of slider has a great influence on the relative bandwidth between fifth and six bands.