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DYNAM Addition I 7.xx

Forced Vibration Analysis 
DYNAM Addition I is used to analyze structures for their dynamic behavior due to external excitation. The program analyzes forced vibrations resulting from earthquakes in accordance with the multi-modal response spectrum method. Furthermore, you can take advantage of this module to simulate impacts and crashes or to analyze excitations of machines. 
The excitation functions can be defined by time histories of forces or moments, by accelerations (accelerogram) or by harmonic functions. Alternatively, you can specify the excitation by defining a response spectrum. In the results display, the program shows internal and support forces, deformations, deformation velocities and accelerations either in the form of a time history or as extreme values. To start the analysis, DYNAM Addition I needs the eigenmodes from DYNAM Basic.
Features

  • Definition of up to 200 excitation cases which can be stored in libraries
  • Tabular loads for entering time-dependent forces (single forces and moments)
  • Harmonic forces for defining a force function f(t) and a moment function m(t), specifying amplitude, angular frequency and phase shift
  • Accelerograms for excitations of the structure's support nodes by time-dependent accelerations
  • Response spectra for analyzing the structure affected by seismic support node excitation according to the modal-analytical response spectrum method
  • Consideration of modal damping
  • Consideration of initial deformations and velocities
  • Load factors for different global directions
  • Combination of several independent excitation force functions in one single dynamic load case
  • Export option for all results in user-defined time steps or as decisive enveloping load combination to RSTAB for superposition in further load combinations
  • Option to stress nodes by different excitation types simultaneously
  • Automatic generation of response spectra taking into account viscous damping
  • Damping coefficient for mass and stiffness matrix
  • Rules for superpositioning in the response spectrum analysis following square root of sum of squares (SRSS rule) or complete quadratic combination (CQC rule)
  • Efficient Newmark-Wilson integration for determination of dynamic behavior
  • Graphical representation of the excitation's time history with print option
  • Graphical evaluation of results by means of time represented in diagrams for particular locations of the structure
  • Extendable library with elastic response spectra according to DIN 4149, EC 8 and UBC 97
Simulation of impact
 
Input 

To determine the dynamic behavior of the structure, DYNAM Addition I performs the efficient Newmark-Wilson integration. The equation of motion is previously projected on the subspace which is spanned by the eigenvectors. This method is characterized by high accuracy and a reliable calculation.
Earthquake records Jungingen 1978
 
Calculation 

With DYNAM Addition I, and especially with the response spectrum analysis, you can determine additional actions due to earthquakes more or less independently from the standard. In case some response spectra are not available in the library, you can enter user-defined spectra of any standard in the module.
Calculation
 
Results

Because of the module's integration in RSTAB, it is possible to include the results numerically and graphically in the RSTAB printout report. In addition, you can use all options from RSTAB to display the results in the graphic.
Normal force disribution within time
 
2.2 Eigenvibrations 2.5 Equivalent Mass Factors 2.7 Internal Forces 2.9 Node Deformations

2.2 Eigenvibrations

2.5 Equivalent Mass Factors

2.7 Internal Forces

2.9 Node Deformations
2.10 Node Velocities 2.11 Node Accelerations Graphics with deformations and internal forces Animation of deformations

2.10 Node Velocities

2.11 Node Accelerations

Graphics with deformations and internal forces

Animation of deformations

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Note

You can find more information about DYNAM Addition I. here:

list image Flyer (PDF / 531 kB)
list image Manual (PDF / 1.07 MB)
list image Hotline
list image Training
list image Module DYNAM Basic
list image Extension DYNAM Addition II.

Demo version of RSTAB 7.xx with add-on modules
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Price Information

Net prices in €
1st license
DYNAM Addition I 1,250.00
Additional license
DYNAM Addition I 562.50
Upgrades DYNAM Addition I
5.xx 2000 --> 6.xx 2004 450.00
list image Pricelist
1.1 General Data
1.1 General Data
1.2 Additional Masses
1.2 Additional Masses
1.5 Accelerogram
1.5 Accelerogram
Generation of response spectrum
Generation of response spectrum
Adopt earthquake
Adopt earthquake
1.5 Excitation Cases - Harmonic Loads
1.5 Excitation Cases - Harmonic Loads
2.1 Eigenvalues and Eigenfrequencies
2.1 Eigenvalues and Eigenfrequencies