Research Article

Periodic Properties of 1D FE Discrete Models in High Frequency Dynamics

Figure 17

A frequency spectrum of an isotropic rod of free ends for B-spline cubic approximation polynomials—a numerical model of 1502 DOFs according to the two-mode Mindlin-Herrmann theory of rods [36], based on equidistant node distribution used for calculations by the FEM (km/s, m).