Linear Dynamic Analysis
Eigenvalue Analysis
• Natural Frequencies, Mode Shapes
• Modal Stresses & Strain Energy
• Multiple Eigenvalue Extraction Algorithms
• Extraction of Zero Frequencies (Rigid Body Modes) & Coincident Frequencies
Modal Dynamic Analysis
• Viscous, Structural, Proportional & Material Damping
• Capabilities to Handle Rigid Body Modes
Transient Dynamic Analysis
• Time Dependent Ground Excitations, Nodal Forces & Pressure Loading
• Nonzero Initial Displacements
• Time History & Snapshot Output for Results
• Generation of Floor Response Spectra
Frequency Response Analysis
• Frequency Dependent Harmonic Ground Excitation, Nodal Force & Pressure
Loading
• Point-to-point Transfer Function Calculation
Random Vibration Analysis
• Stationary & Non-stationary Input
• Auto PSD & Complex Cross PSD Input
• Numerical or Exact Integration of the PSDs to Compute the Covariance Matrices
• PSD & RMS Response Output
Shock (Response) Spectrum Analysis (Seismic)
• Multi-directional Displacement, Velocity or Acceleration Spectra Input
• Modal Combination Rules
• Absolute Sum
• Square Root of Sum of Square or RMS Sum
• Peak RMS or NRL Sum
• Complete Quadratic Combination (CQC) Sum
• Automated Mode Selection & Spectra Computation by U.S. Navy DDAM Method
• Missing Mass Correction