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Frequently Asked Questions (FAQ)
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AnswerIn order to carry out the import in RFEM/RSTAB by using the DSTV interface, the program requires the nodes where the cross-sections can be located.It often happens, that members are only selected in the case of the "Export only selected objects" option (Figure 02). In this case, the nodes are missing in the selection. The model cannot be created.Therefore, you have to select all objects that are necessary for the description of the model by using the "Select" → "Related Objects" option (Figure 03). Then, the import is carried out properly.
AnswerWhen using the COM interface (RF‑COM or RS‑COM), you can create a comment by using the guide object interface IGuideObjects. The following is an example program that creates a comment:Sub test_comment()' get interface from the opened model and lock the licence/programDim iModel As RFEM5.IModel3Set iModel = GetObject(, "RFEM5.Model")iModel.GetApplication.LockLicenseOn Error GoTo eDim iModelData As RFEM5.IModelData2Set iModelData = iModel.GetModelDataDim iGuiObj As RFEM5.IGuideObjectsSet iGuiObj = iModel.GetGuideObjectsDim comm As RFEM5.Comment' set frame typecomm.Frame = CircularFrameType' set reference object typecomm.ObjectType = GeneralObjectTypecomm.ObjectNo = 1' set point if GeneralObjectType is choosencomm.Point.X = 2comm.Point.Y = 4comm.Point.Z = 6' set offset from reference objectcomm.Offset.X = 0.5comm.Offset.Y = 1comm.Offset.Z = 1.5comm.Rotation = 1' set text of commentcomm.Text = "testcomment"' transfer object to programiGuiObj.PrepareModificationiGuiObj.SetComment commiGuiObj.FinishModificatione: If Err.Number <> 0 Then MsgBox Err.description, , Err.SourceSet iModelData = NothingiModel.GetApplication.UnlockLicenseSet iModel = NothingEnd SubThe selection of the reference or the element to which the comment is refferred to is defined by the type (ObjectType) first. Here, it is possible to select, for example, a member, a node or any point in space. Next, the number of the reference object is specified via ObjectNo (for example, Member 1). If you have selected a free point, it is set by Point.Finally, you can specify an offset which results from the reference object.
AnswerIn RFEM and RSTAB, you can define user-defined views and visibilities. The remaining or hidden structure is displayed in the background by default.It is possible to deactivate this option in Project Navigator - Display, so that the selected partial view is only visible and the rest of the structure is hidden completely.
Answer3d objects in the format "3ds" can be easily loaded in the program via Insert → visual objects in the existing model (see image). In the mask "new visual object" the scale, the insertion point and the rotation angle can be adjusted.
AnswerIf you can not grab any of the background film's dots, make sure the object snap settings are correct.If all other points are detected by object snap, the problem already lies with importing the background slide. If 2 lines are not exactly in one plane, even if these planes have only one infitisimal small distance, no node is formed during the import. Thus, this intersection can not be selected. You should solve this problem directly in your DXF file.
AnswerAt the bottom of the user interface of RSTAB and RFEM is the status bar. The center area can be used to influence the user interface. If the options FANG and OFANG are activated, grid points, nodes and objects can be caught (see Figure 1). Then a dimensioning of the system is possible.
AnswerWith a visibility, you can display a partial view of a model or a group of objects (for example, surfaces of a plane, columns of a story).In the Project Navigator - Views, you can manage "User-defined visibilities," which you can define individually. Furthermore, the program creates "Generated Visibilities" automatically.
The automatic detection of integrated objects in a surface does not work.When I try to integrate them manually into the surface, a message appears stating that the lines or openings are not located in the surface
AnswerIn the case of imported structures, for example, or surfaces crooked in the ground, it often happens that the nodes are affected by inaccuracies. By default, RFEM allows for an inaccuracy of 0.5mm. If this inaccuracy is exceeded, the nodes, lines, and openings elements are no longer added automatically.The same imprecision is tolerated even for curved surfaces (quadrangle).However, if you still try to integrate the elements into the surface manually (Edit Surface -> A corresponding warning 929 concerning elements lying outside the surface appears.By increasing the tolerance range with "Tools -> Regenerate model "" Although it is possible to force the detection of integrated elements, this usually results in a distorted FE mesh and thus also points of discontinuity in the FEM calculation.The problem can be solved for plane surfaces by using the function "Edit -> Purge. To do this, you have to select the corresponding elements first. Then they are projected onto the desired plane and can then be recognized automatically.
AnswerYou can control the intensity of the inactive objects in Program Options under the 'Graphics' tab (see figure).
Unfortunately, there is no 'Split surface along selected line' feature. You can either split the surface equally or along all the integrated lines.
In order to split the surface on one integrated line only, it is necessary to temporarily manage the integrated lines manually (see Figure 01). After splitting the surface, you can enable the automatic object detection again (see Figure 02).
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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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