Research Article
Periodic Properties of 1D FE Discrete Models in High Frequency Dynamics
Figure 20
Relative errors of frequency spectra of an isotropic rod of free ends for various dispersions of element length —a numerical model of 736 DOFs according to the elementary theory of rods [36], based on the fifth degree of approximation polynomials and Chebyshev node distribution used for calculations by the TD-FEM (km/s, m).