TRAMotion - Vehicle Crossing Video #01: CAD-preparation скачать в хорошем качестве

TRAMotion - Vehicle Crossing Video #01: CAD-preparation

TRAMotion – Software for Envelope Curve Calculation Vehicle Crossing – Video No. 1: Preparing Alignments in AutoCAD When a vehicle crossing analysis is required, TRAMotion provides the appropriate features to carry it out with precision. In this video, we guide you step-by-step through the correct preparation of CAD data for such an analysis. Let’s assume we want to perform a vehicle crossing analysis for a specific track alignment. For this tutorial, we focus on two parallel tracks. In the first step, all non-relevant elements are hidden, so that only the two sections intended for analysis remain visible. Upon closer inspection, it becomes clear that these sections consist of multiple individual segments. Since TRAMotion works exclusively with polylines when importing data from AutoCAD, the tracks must be prepared accordingly. First, the initial section is enclosed with a closed polyline. For this purpose, we use the AutoCAD BOUNDARY function. The island detection option is deactivated, and the desired area is selected with a click. AutoCAD then automatically creates a continuous polyline. Since only a part of this line is relevant for TRAMotion's calculation, the unnecessary segments are removed. The same process is then repeated for the second track section. Next, the newly created polylines are assigned to the appropriate layers. It’s important to follow TRAMotion's naming conventions: the track centerline must be placed in the TRAM_AXIS layer. As TRAMotion requires imported track sections to be continuous, we apply a simple method: for the first calculation, only one section is moved into the active TRAM_AXIS layer — while the second remains temporarily hidden in a layer that is invisible to TRAMotion. Before saving the data, the sections must be properly aligned. The polyline under analysis should run horizontally and start as close to the origin as possible – ideally from left to right along the X-axis. However, this condition is somewhat flexible, so an exact zero point is not mandatory. This also means the second track section can remain unchanged, preserving the relative positioning between the two alignments. After completing all preparations, the file is saved in DXF format. This concludes the CAD-based preparation for the envelope curve calculation of the first section. The analysis in TRAMotion can now begin. Once the first section is processed, the layers are switched to allow calculation of the second track section. The results of both calculations are displayed in the MULTI RESULTS COMPARISON tab, where the distance between the two envelope curves is clearly visible. For further analysis and details, please refer to the next video: Vehicle Crossing No. 2.