In addition to our technical support (e.g. via email, chat), we also offer an extensive range of free online services available 24/7 on our website.
Frequently Asked Questions (FAQ)
Customer Support 24/7
An automatic increase of the reinforcement for the deformation analysis is not possible. As soon as the deformation calculation is based on the determination of the stiffness, it is not expedient to develop an algorithm that B. increases the reinforcement at the point of maximum deformation. Such a procedure would not result in the deformation being reduced.
Therefore, the reinforcement must be increased manually.
AnswerPlease check if the structure tears due to pure load. It is possible that the increase in deformations is mainly caused by creep and shrinkage, which are not active at time 0. In the nonlinear calculation, shrinkage is considered as a strain load, which can cause additional stresses.
Temperature-dependent stress-strain properties of an elastic isotropic material can be defined in a diagram or imported from [Excel]. These properties are considered for member and surface elements subjected to thermal load (changes or differences in temperature).
The Reference temperature defines stiffnesses for the members or surfaces that have no temperature loads. For example, if a reference temperature of 300 °C is set, the reduced elastic modulus of this point of the temperature curve is applied to all members and surfaces.
The Options dialog section allows you to control if the Poisson's ratios that are applied to the complete temperature diagram are identical. Clear the check box to access the Poisson's Ratio table column for individual entries.
You have to select and define the Temperature/Modulus diagram by your own.
In the FAQ downloads you'll find a sample code how to set NURBS surfaces. The knot vector KnotsX, KnotsY determines how the control points affect the NURBS curve. The number of knots is equal to the number of nodes plus order.
In principle, the program always tries to perform a plastic design for cross-section classes 1 and 2. However, if torsion is additionally contained, the design can only be performed elastically. This is due to the interaction conditions according to EN 1993-1-1 clause 6.2.9, which do not include any torsional component.
For this reason, the "Cross-Section Design and Torsion" setting is available in the details of the add-on module. By adjusting the limit shear stress for the cross-section designs, you can also neglect the torsion under your own responsibility.
AnswerWhen exporting the data to the Nemetschek format, the grayed-out options are generally not available. Everything is always exported.You can only select the options when exporting the results to the Glaser format.
AnswerIn addition to the standard functions, all input tables in the program also have the block functions. They allow you to edit marked numbers and number fields in the table in one step.You can access the block functions by right-clicking in the table:1. Add - A value is added to or subtracted from the selected cells with a numerical value.2. Multiply - Cells with a numerical value are multiplied by a factor.3. Divide - Cells with a numerical value are divided by a divisor.4. Set - The value of the first selected cell is set to all cells in the selection.5. Generate - Cells between the first and the last selected row are generated by interpolation of both edge values.The "Set" function allows you to quickly transfer a value to other rows.These functions are an ideal tool for changing the existing node coordinates to a new geometry, for linear extrapolation of unit load entries to any value, for unifying the values, and much more.
The best way is to create the bolt as a single solid and not from several partial solids (within the hole). Then, you can arrange the surface release between the contact surfaces of the solids. In the case of a bolt connection, the setting for the surface release type would have to be defined with a nonlinearity in the uz direction.
As an alternative, you can also enter releases and spring stiffnesses for the other directions.
The corresponding example can be downloaded here.
AnswerYou have probably selected too few mode shapes in the "Natural Vibration Cases" window of RF‑/DYNAM Pro. In this case, it may happen that the defined mode shapes do not vibrate in all directions and thus no mass is excited in these directions.Therefore, you should calculate at least so many mode shapes that the required 90% of the mass is excited in each direction in your calculation.This is also described in more detail in the FAQ under the link below.
AnswerIn this case, the center of gravity is the geometric center of gravity of the considered objects. This can be generated by the program: Select all relevant objects and then right-click one of these objects. In the shortcut menu, select the "Center of Gravity and Info..." feature.
Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.
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.
“Thank you for the valuable information.
I would like to pay a compliment to your support team. I am always impressed how quickly and professionally the questions are answered. I have used a lot of software with a support contract in the field of structural analysis, but your support is by far the best. ”