Dynamic and Seismic Analysis Software
Structural FEM Analysis and Design
The structural analysis software RFEM 6 is the basis of a modular program family. The main program RFEM is used to define structures, materials, and loads for planar and spatial structural systems consisting of plates, walls, shells, and members. The program also allows you to create combined structures as well as model solid and contact elements.
Structural Frame & Truss Analysis Software
The structural frame analysis software RSTAB 9 has a similar range of functions as the FEA software RFEM. Due to the special attention to beam, frame, or truss structures, it is very easy to use and for many years, it has been the best choice for structural analysis and design of pure structural member models.
Determination of Natural Frequencies and Mode Shapes
The Modal Analysis add-on for RFEM 6 / RSTAB 9 allows you to determine natural frequencies and mode shapes of member, surface, and solid models.
Seismic Analysis
In the Response Spectrum Analysis add-on for RFEM 6 / RSTAB 9, the seismic analysis is performed using the multi-modal response spectrum analysis. The spectra required for this can be created in compliance with the standards or user-defined. From this, the equivalent static forces are generated.
Forced Vibration Analysis
The RF‑/DYNAM Pro - Forced Vibrations add-on module for RFEM 5 / RSTAB 9 performs the analysis of forced vibrations including the multi-modal response spectrum analysis and the time history analysis.
Nonlinear Time History Analysis
RF-/DYNAM Pro - Nonlinear Time History for RFEM 5 / RSTAB 8 is an extension of the add-on modules RF-/DYNAM Pro - Natural Vibrations and RF-/DYNAM Pro - Forced Vibrations (linear time history analysis).
CADS Footfall Analysis
Footfall Analysis is post-processing software developed by CADS that can be used in conjunction with RFEM 5 and RF-DYNAM Pro - Natural Vibrations provide footfall response analysis calculations.
Interfaces for Data Exchange
The structural analysis software provided by Dlubal Software can be integrated seamlessly into the Building Information Modeling (BIM) process. The large number of interfaces ensures the data exchange of digital building models with RFEM or RSTAB.
The web service (programmable interface) can be used to read or write data from/to RFEM and RSTAB.
Support and Learning
Customer service is a fundamental pillar of the Dlubal Software company philosophy. We provide any necessary support you need to complete your daily work.
Contact Us
Do you have any questions about our products or which are best suited for your design projects? Contact us via phone, email, or chat or find suggested solutions and useful tips on our FAQ page available 24/7.
Further Information
Manual of Dynamic Analysis for RFEM 6 / RSTAB 9


With the RF-DYNAM Pro - Equivalent Loads add-on module, it is possible to generate automatically load distribution in accordance with a mode shape and export it as load case to RFEM.
- What method is applied in the RF‑/DYNAM Pro - Equivalent Loads add-on module?
- How can I display the results of the RF‑/DYNAM Pro add-on module in the printout report?
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I need many mode shapes to achieve a sum of 90% effective modal mass. Can I limit the number of mode shapes for generating equivalent loads?
- Is the German National Annex 2021‑07 to Eurocode 8 available in RFEM 5 / RSTAB 8?
- Can I export a response spectrum from RFEM 6 and use it in RFEM 5, for example?
- How can I neglect masses in my modal analysis in RFEM 6 / RSTAB 9?
- How can I analyze the failure of an object, such as a column, in my modal analysis?
- Where can I adjust the standardization of a mode shape in RFEM 6 / RSTAB 9?
- Why do the results in a modal analysis differ between the initial prestress and the surface load?
- How can I perform an earthquake analysis in RFEM 6 and RSTAB 9?
Associated Products