The study of Lamb wave propagation law is of great significance for health monitoring and non-destructive testing of panel structures. However, in the panel with stiffeners, the propagation law of the Lamb wave is very complicated, and there are still some inadequacies in the current research, especially for the stiffened panel with multiple high stiffeners. In this paper, the propagation law of Lamb waves in panels with multiple high stiffeners is studied by finite element simulation. The time domain waveforms of received displacements are compared when the number of stiffeners is different, and the energy ratio curves are obtained. The results show that the number of stiffeners has little effect on the wave velocity of the Lamb wave. The Lamb wave decays when it passes through the stiffeners, and the more the number of stiffeners, the more obvious. In the 200-500 kHz band, the Lamb wave energy ratio curve is moderate and small, and the Lamb wave energy pass rate is high and stable in the 100-200 kHz band. This study can provide reference for signal analysis in the structural health monitoring and non-destructive testing of high stiffened panels.
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