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Numerical modeling of dispersion phenomena in thick plate
Hora, Petr ; Michálek, J.
Paper report on a technique for analysis of propagating multimode signals. The method involves a 2-D Fourier transformation of the time history of waves recieved at a series of equally spaced positions along the propagation path. Output of the transform being presented using an isometric projection which gives a 3-D view of the wave number dispersion curves. The time history of waves was obtained by the FE code, MARC.
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The elastic wave propagation over the shape transitions of bodies
Morávka, Š. ; Hora, Petr
The work treats the elastic wave propagation in the basic construction elements of structures. The samples with the most common shape transitions are used. Results of analytical computations, numerical simulations and experimental results are verified and compared mutually. The generalized ray theory, the FEM (implemented in software MARC/MENTAT)and the transient piezoceramic transducers are used.
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