The Neutral Axis Reference
- Last UpdatedJan 13, 2023
- 1 minute read
The neutral axis reference identifies a P-line in the Structural Pointset. It is set by the NAREF command. The attribute is usually set to the name of the P-line, but may be set to the P-line’s number in the member list of the Pointset. For example:
|
NAREF /UB-NA |
Sets neutral axis reference to the P-line called /UB-NA |
|
NAREF 3 |
Sets neutral axis reference to the third P-line of the Structural Pointset |
If you do not set NAREF, Model makes an assumption about where the neutral axis is. You are strongly recommended to set the neutral axis reference in the Catalog.
Model uses as the neutral axis the first P-line in the Structural Pointset which has a PKEY value of NA, if any. Failing that, it will choose the first P-line with a PKEY value of NAXI, and failing that, it will choose the first P-line with a PKEY value of ZAXI. If there are no P-lines with a PKEY value of NA or NAXI or ZAXI, Model assumes that the neutral axis of the Component lies at the component origin and has a direction along the positive Y axis.
P-line Axis Definition