: Automatically increasing density can increase the stable time increment, making your simulation finish significantly faster.
Best for smooth, long-duration seismic events where nonlinear material behavior (like steel yielding or concrete cracking) is present. abaqus earthquake analysis
Rayleigh damping can over-damp high frequencies in Explicit analyses. Use stiffness-proportional damping sparingly. : Automatically increasing density can increase the stable
| Pitfall | Solution | |---------|----------| | High-frequency noise in acceleration | Use *FILTER in Abaqus/Explicit (e.g., BUTTERWORTH) | | Spurious wave reflections | Add infinite elements ( *ELEMENT, TYPE=CIN3D8 ) or dashpots | | Long runtime in implicit | Enable parallelization ( *PROCESSORS ), reduce time steps near nonlinear events | | Mass scaling distortion | Limit scaling factor < 100, check kinetic energy < 5% of internal energy | check kinetic energy <