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The effect of input pulse shape on stress wave propagation in a thick plate
Hora, Petr
The effect geometrical dispersion is that the energy in a wave-packet propagates at different speeds depending on its frequency. It is shown that duration of a wave-packet increases linearly with propagation distance and also that the duration of a wave-packet after a given propagation distance depends on the input signal. Some conclusions are made concerning the Lamb wave propagation in a steel plate.
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The effect of geometrical dispersion on stress wave propagation
Hora, Petr
The effect geometrical dispersion is that the energy in a wave-packet propagates at different speeds depending on its frequency. It is shown that duration of a wave-packet increases linearly with propagation distance and also that the duration of a wave-packet after a given propagation distance depends on the input signal. Some conclusions are made concerning the Lamb wave propagation in a steel plate.
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Comparison of the matrix techniques for modeling stress waves in multilayered media
Hora, Petr
This paper describes the development of a general purpose model for wave propagation in Cartesian system. When isotropic materials are used, the model can account for elastic and visco-elastic isotropic materials, single or multi-layered structures, free or leaky systems. Model determines what resonances can exist in order to satisfy the boundary conditions and the bulk wave propagation characteristics in each of the layers.
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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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