An improved analytical model that considers lateral effects of a phononic crystal with a piezoelectric defect for elastic wave energy harvesting

• Lateral movements of a piezoelectric defect are considered. • Three coefficients are newly presented for quantification of the lateral effects. • An improved electromechanically coupled transfer matrix is derived in an explicit manner. • Output results from the analytical model agree well with those from a finite element model. This paper aims to improve the existing electromechanically coupled analytical model that was developed for...