28 October 2019
004163
Is it possible to design a "Kármán vortex street" behind an object in the numerical wind tunnel of RWIND Simulation?
Answer
Keywords
Vortex-induced Vibration Chimney Strouhal Shedding frequency
Reference
[1] | DIN 4149: Bauten in deutschen Erdbebengebieten - Lastannahmen, Bemessung und Ausführung üblicher Hochbauten. Beuth Verlag GmbH, Berlin, 04, 2005. |
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Videos
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Knowledge Base Articles
New
In RFEM 5 and RSTAB 8, it is possible to assign nonlinearities to member end releases. In addition to the nonlinearities ‘Fixed if’ and ‘Partial activity’, you can also select ‘Diagram’. If you select the ‘Diagram’ option, you have to specify the according settings for the activity of the member end release. For the individual definition points, it is necessary to specify the abscissa and ordinate values (deformations or rotations and the according internal forces) that define the release.Screenshots
Product Features Articles

Members of triangular and quadrilateral lattice towers are allocated automatically provided that the lattice tower has been generated in the RF-/TOWER Structure and RF-/TOWER Equipment add-on modules.
However, it is also possible to allocate the members manually. In RF-/TOWER Design, you can use the effective lengths of truss members generated in the RF-/TOWER Effective Lengths add-on module. A manual input is also possible.
According to EN 1993-3-1 and EN 50341 standards, you can specify various bracing cases and support types for members of legs and bracing.
Frequently Asked Questions (FAQ)
- How can I create a drilled beam in RFEM?
- How can I additionally model welds for the connection of two surfaces with a contact solid?
- In connection with the calculation according to the large deformation analysis, I get significantly smaller deformations than for the calculation according to the linear static or second-order analysis. How is this possible?
- When entering data in the RF‑/STEEL EC3 add-on module, I get the error message "Incorrect location of the intermediate lateral restraint". Why?
- Which formula is used in the RF‑/TOWER Loading add-on module to calculate the first natural frequency for the determination of the structure coefficient?
- Is it possible to control the beam steering of an antenna in RF‑/TOWER Design?
- When creating a material, there are no nonlinear material models available for surfaces or solids. Why?
- How can I control the wind load distribution on tower sides in the RF‑/TOWER Loading add-on module?
- Is it possible to use Dlubal Software for the calculation and design of 5G transmission masts, antenna masts, or towers?
- Are the Dlubal Software programs applicable for analysis of process manufacturing plants?
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Associated Products
Stand-Alone Program
Stand-alone program for numerical simulations of wind flow around buildings or any other objects. The generated wind loads acting on these objects can be imported into RFEM / RSTAB programs for static and dynamic analysis.
2,690.00 USD