FEATURES OF ENERGY TRANSFER IN ELASTIC WAVEGUIDES
DOI:
https://doi.org/10.15407/dopovidi2025.04.045Keywords:
forced oscillations, efficiency of generation of the wave field, edge resonanceAbstract
Based on a comparison of forced symmetrical oscillations in an elastic waveguide with free side surfaces and a waveguide with a single wave propagation velocity, fundamental differences in the efficiency of excitation of wave field have been established. It is well known that an increase in the “pumpable” energy can be associated both with the approximation of the external load frequency to the system’s natural frequency and with an increase in the degree of coherence of the load and the shape of the oscillations. Both factors are present in the wave field under consideration. The influence of the degree of coherence between the wave field and the load was analyzed based on the efficiency of wave field excitation for different types of loads. When the frequency of the external load approaches the edge resonance frequency (natural frequency), the energy “pumped” into the waveguide exceeds the energy in the low-frequency range by a factor of ten.
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