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Fatigue analysis based on SSD

This is a simplified bumper model with base acceleration. It shows how to fatigue analysis for sine sweep testing with *FREQUENCY_DOMAIN_SSD_FATIGUE and how to postprocess with *DATABASE_FREQUENCY_BINARY_D3SSD and *DATABASE_FREQUENCY_BINARY_D3FTG. Example 5.5 from LS-Dyna training class NVH, Fatigue and Frequency Domain Analysis with LS-DYNA by Yun Huang.