PDF file with Seismic Random Vibration analysis using PSD on a real size skyscraper; 68 pages in which we learn: - how to assign new materials - how to manage only important parts - how to define a Modal analysis and ask for natural frequencies - how to understand and interpret Random Vibration analyses - how to define Random Vibrations analyses on all 3 axes - how to check the strength of parts using Equivalent Stress and Response PSD results etc.