Find Evaluation Positions
The main objective of this function is to find the evaluation locations or positions for each of the 1D weld elements. The evaluation positions vary for each weld type.
Evaluation positions are determined based on the evaluation distance calculation
specified by the weld regulations.
Note: In the classification area, if the evaluation
distance method is set to manual, then the
Evaldist value is used
to find the evaluation positions.The following inputs are required to determine the evaluation positions:
- Evaluation distance
- Weld width factor
- Shell thickness
- Direction vectors for the 1D elements
The calculations to arrive at the evaluations positions for the different types of welds are shown below.
For T and L Welds
- Evaluation Distance
Evaldist= Standard distance from the specification- Weld Width
Weldwidth = Weld Width Factor * Shell Thickness- Evaluation Position from Weld Element Centroid
(Thickness / 2.0) + Evaldist + Weldwidth
For B and O Welds
- Evaluation Distance
Evaldist= Standard distance from the specification- Weld Width
Weldwidth = Weld Width Factor * Shell Thickness- Evaluation Position from Weld Element Centroid
Evaldist + Weldwidth
Using this relative evaluation distance and the centroid data of the 1D element, the absolute coordinates of the evaluation positions are determined.
For each of these evaluation positions, the nearest shell element and the closest node of the shell element are determined. These entities will be used to get the stress results.