Circular cross-sections 1 Complex algorithms 1 Discrete elements method Dispersion (waves) 1 Dispersion curves 1 Elastic wave propagation 1 Elastic waves 1 Finite difference method Finite element method 1 Guided electromagnetic wave propagation 1 Longitudinal elastic wave 1 Longitudinal waves 1 Method model 1 Model and simulation 1 Numerical methods 1 Steel rod 1 discrete element method 1 dispersion curves 1 finite element method 1 guided waves 1 longitudinal wave 1 numerical modelling 1