PHONONIC BAND GAPS WITH COUPLED OSCILLATOR IN ONE-DIMENSIONAL MASS–SPRING STRUCTURES
This research analysed theoretically the wave propagation in 1D mass spring system in an infinite lattice subjected to periodic force loading. Newton’s law and the periodic boundary conditions are employed to generate the equation of motion of the period chains. The introduction of extra springs into conventional spring mass, changes the dynamics of the structures. The proposed modified spring mass structure is able to significantly broaden bandwidth and enhance attenuation at the low frequency region. In addition, the effects of elastic foundation of the mass spring structures is investigated. It was found that a cut off frequency can be generated before propagation of wave occur in the system.
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