FS2000 has three fundamental dynamic analysis capabilities:

Frequency Analysis  This forms part of the core module of FS2000 and is used to evaluate structural natural frequencies (Vibration modes).

Dynamic Response (Normal Mode Response)  This is an optional module  FSDynamic
Harmonic Response
Transient Response
Spectral Response 
Linear/Nonlinear Time History  This an optional module  FSDyNoFlex
Incremental dynamic solver
Frequency Analysis (FSFrequency)
FSDynamic is the dynamic response module of FS2000. The analysis is based on the normal mode method. The Frequency Analysis module of FS2000, which is included in the core module of FS2000 is used to evaluate the frequencies and mode shapes of linear structural models. The response module is used to evaluate the resulting deflections, forces and stresses due to various forms of excitation.
 Load Case/Mass Case Conversion  Standard Load cases can be converted to Mass Definition Cases by using a mass conversion constant.
 Multiple Mass Cases  Any number of mass definition cases may be used to create the generated load cases.
 Lumped/Consistent Mass Model
 Jacobi or Subspace Iteration Methods
 Graphical Output  Animated mode shape displays
Response Analysis (FSDynamic)
 Harmonic Response
 Constant Amplitude  Forces or moments
 Rotating Unbalance
 Support Motion  Displacement, velocity or acceleration
 Frequency Response  Amplitude spectrum input
 Deflection/Force Response plots or tabulated output at selected nodes or elements
 Full Std Result Case Output  Snapshot Output at Specific time and frequency
 Transient Analysis
 Damping  Critical damping ration for each mode
 Initial Conditions  Nonzero initial displacements and velocities
 Time Dependent Excitation  Forces or moments using a defined curve or a generated curve based on a damped harmonic signal.
 Shock/Impact  Excitation due to undamped shock/impact on an undamped system. Standard pulse curves eg triangle, half sine etc.
 Support Excitation  Base displacement using a defined curve or a generated curve based on a damped harmonic signal.
 Deflection/Force Time history response plots or tabulated output at selected nodes or elements
 Full Std Result Case Output  Snapshot Output at Specific time and frequency
 Response Spectrum Analysis
 Response Spectra Curves  Displacement, velocity or acceleration spectra
 Multiple Mass Cases  Any number of mass definition cases may be used to create the frequency cases. Standard Load cases can be converted to Mass Definition Cases by using a mass conversion constant.
 Directional Loading  Multi directional spectra using direction factors
 Rotational Motion  Rotational base motion in accordance with Eurocode 8.
 Mass Participation  Mass participation evaluated for all included modes.
 Standard Result Cases  The load cases created can be postprocessed like any other load case.