It is of critical importance to investigate the dispersion characteristics of flow fields during acoustic resonance mixing, as this provides fundamental insights into the underlying mixing mechanisms and supports the optimization of process parameters. This study establishes a solid-liquid-gas multiphase and multicomponent dynamic model based on the Euler-Euler two-fluid model to simulate the acoustic resonance mixing process of a high-viscosity explosive simulant. The effects of different container shapes and vibration accelerations on mixing efficiency are systematically analyzed. The results show that by 300 s of mixing, the concentration gradient in the spherical-bottom container has essentially disappeared, while that in the flat-bottom container remains, indicating that the spherical-bottom design is more suitable for resonant acoustic mixing under low-frequency and high-acceleration conditions. Based on this conclusion, subsequent studies focus on the spherical-bottom container, the particle phase concentration difference decreases to 4.97% at 300 s (30 g), 4.59% at 200 s (65 g), and 4.28% at 150 s (80 g). This study provides theoretical and simulation support for investigating the internal mechanisms of acoustic resonance mixing.