Maxwell Damping: An Alternative to Rayleigh Damping in Seismic Analysis
Maxwell damping was introduced as a new feature in ITASCA Software Version 9 for FLAC3D, FLAC2D, and 3DEC. It is a more frequency-independent form of damping for time-domain analyses. It eliminates the three major issues associated with Rayleigh damping:
- Offers frequency independence over a much wider range,
- Does not significantly reduce the numerical time step, and
- Avoids the generation of unphysical body forces.
FLAC3D models using Maxwell damping, for example, can be 10-200 times faster, and as accurate, than those models using Rayleigh damping. With Maxwell damping, large, 3D site responses and soil-structure interaction become practical to analyze.
This webinar was presented by Ethan Dawson (US Army Corps of Engineers) and Zhāo Chéng (ITASCA) on September 24, 2024.
🔍 Highlights:
- Maxwell damping formulation, verification, and validation
- Calibration tool (spreadsheet)
- Applications, including site responses and soil-structure interactions
- Merits and drawbacks will also be discussed
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