Simulation Toolbar - Dynamics The Dynamics category provides tools for defining uniform base excitation, selected base excitation, and global damping for the active linear dynamic study. Button Tool Tip Purpose Uniform Base Excitation Defines uniform base excitation for the active linear dynamic study. Selected Base Excitation Defines selected base excitation for the active linear dynamic study. Global Damping Defines global damping for the active linear dynamic study. Parent topicSimulation Toolbar Simulation Toolbar - Main Simulation Toolbar - Fixtures/External Loads Simulation Toolbar - Result Tools Simulation Toolbar - Thermal Loads Simulation Toolbar - List Results Tools Simulation Toolbar - Trend Tracker Simulation Toolbar - Fatigue