We provide hints and tips to help you get started with the basic program RFEM.
FAQ 004204 | Is it possible to also define a load as acceleration [m/s²]?
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First Steps with RFEM
Question
Is it possible to also define a load as acceleration [m/s²]?Answer
Yes, it is possible by using the load generator.
In the "Tools" menu, you can find the "From Motion..." command under "Generate Loads."
In the "Generate Loads From Motion" dialog box, you can define the acceleration a in [m/s²], which can be used to determine a load, depending on the mass of the structure.
In RSTAB, it is thus possible to generate a load on a member. In RFEM, on a member, surface, or solid.
Important: The program uses the dead load of the structure. The mass of a specific load case cannot be applied here.
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Dlubal FAQ Load Acceleration Frequently Asked Question FAQ about Dlubal Question and Answer about Dlubal
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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.
New
Increased Calculation Performance by Reducing the Nodal Degrees of Freedom
The number of degrees of freedom in a node is no longer a global calculation parameter in RFEM (6 degrees of freedom for each mesh node in 3D models, 7 degrees of freedom for the warping torsion analysis). Thus, each node is generally considered with a different number of degrees of freedom, which leads to a variable number of equations in the calculation.
This modification speeds up the calculation, especially for models where a significant reduction of the system could be achieved (e.g. trusses and membrane structures).
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