Why we got instability results when simulating elastic waves (Lamb waves) at high frequency using Abaqus?

Hi, I am trying to model Lamb waves propagation in an Aluminum plate using Abaqus. If I choose the frequency of 5-cycle Hanning excitation source is 0.2 MHz (to make sure that only 2 modes S0 and...

19 August 2020 7,167 8 View