In addition to our technical support (e.g. via chat), you’ll find resources on our website that may help you with your design using Dlubal Software.
Frequently Asked Questions (FAQ)
Customer Support 24/7
AnswerBoth RFEM and RSTAB are ideally suited for the application in mechanical engineering and are used by numerous users in daily practice. Due to the modular system, you can only use the add-on modules required for your purposes.
Main Programs RFEM or RSTABThe main programs are used to define structures, materials, and loads.RSTAB provides optimal tools for beam, truss or frame structures.
In addition, RFEM provides you with additional options to calculate the structures with surface or solid elements.
Dynamic AnalysesIn case a seismic analysis or vibration designs are required, the RF‑/DYNAM Pro add-on modules provide special tools for determining natural frequencies and mode shapes, for an analysis of forced vibrations, a generation of equivalent loads, or for a nonlinear time history analysis.If you have any question about the Dlubal Software programs, please do not hesitate to contact the sales department.
Calculation of stresses and comparison with limit stresses
Modeling of pipelines (in RFEM only)
- RF-PIPING Design
Design of Pipelines (only in RFEM)
AnswerYou can change the cross-section, generally adjust the model and its loads, or activate stabilization measures in STEEL EC3.The settings of rotational restraint and shear panel defined in window 1.12 Parameters - Members or 1.13 Parameters - Sets of Members, which are then considered in the module-internal eigenvalue solver to determine the critical load, are particularly suitable for this.
I have designed a DuenQ cross-section resp. general cross-section in STEEL EC3, in an older model of RFEM 4 or RSTAB 7. At that time, a cross-section class 1 or 2 was determined. Now I have opened the model in RFEM 5 and the cross-section is only classified acc. to Class 3 or 4. What is the reason? Was the design more economical at the time?
AnswerThe design of general cross-sections or DuenQ cross-sections is always performed elastically in STEEL EC3, i.e. according to Class 3 or 4. Since the conditions of interaction are restricted to some cross-sections, no plastic design is possible for any cross-section shapes. In RFEM 4 or RSTAB 7, however, it was possible to classify a cross-section as class 1 or 2, even though the subsequent design was carried out elastically.To eliminate this ambiguity and to create consistency, the classification has also been changed to cross-section classes 3 and 4.
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Wind Simulation & Wind Load Generation
With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.
The generated wind loads acting on these objects can be imported to RFEM or RSTAB.
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