This example problem is a power spectral density (PSD) analysis of the nuclear island component of a nuclear power plant. The problem shows the analysis methods available to simulate the response of the nuclear island to a seismic event, accounting for motion incoherency and wave-passage effects.
The following features and capabilities are highlighted:
- Modal analysis of a large shell-type structure with high modal density. 
- PSD analysis using enforced displacement. 
- Capturing both motion incoherency and wave-passage effects.