Coordinate System

 


Coordinate System is to be defined from this tab. Unless specified otherwise, OpenBrIM always uses (0,0,0) as standard origin.

User may define a new coordinate system for practicality.


Example 1

Internally Pressured Cylinder: Surface Forces

 

  • Cylinder divided into 16 different orientations to be represented in FEA.

  • Each of coordinates systems are created according to those new orientations so that Z direction always act as normal direction for corresponding surfaces.

  • Nodes are assigned to corresponding coordinate systems.

  • Surfaces defined are automatically acting upon corresponding node orientations.

  • Surface forces can be seen in figure below.

  • By defining new node orientations, users are freeing themselves from calculating perpendicular orientation one by one for every single surface.


Example 2

Three Span Skewed and Curved Bridge : Bearing Rotations

  • Pier orientations and bridge curvature can be seen from the model above.

  • Some bearings for this structure should restrict movements tangent to the bridge at their location. Hence, bearing elements for the bridge have to be oriented accordingly.

  • For simplicity only a part of the bridge remodeled: