Description
The CORD2C entry defines a cylindrical coordinate system with the coordinates of three points.
Format
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| CORD2C | CID | RID | A1 | A2 | A3 | B1 | B2 | B3 | |
| C1 | C2 | C3 |
Example
| CORD2C | 5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | ||
| 1.0 | 1.0 | 0.0 |
| Field | Definition | Type | Default |
|---|---|---|---|
| CID | Coordinate system identification number. | Integer > 0 | Required |
| RID | Identification number of a coordinate system that is defined independently from this coordinate system. | Integer ≥ 0 | 0 |
| Ai, Bi, Ci | Coordinates of three points in coordinate system defined in field 3. | Real | Required |
Figure 1: CORD2C definition
Remarks
- Continuation entry must be present.
- The three points (A1, A2, A3), (B1, B2, B3), (C1, C2, C3) must be unique and non-colinear. The model translator checks for non-colinearity.
- Coordinate system identification numbers on all CORD1C, CORD1R, CORD1S, CORD2C, CORD2R, and CORD2S entries must all be unique.
- The reference coordinate system must be independently defined.
- A RID of zero (or blank) references the basic coordinate system.
- The location of a grid point (P in the sketch) in this coordinate system is given by (R, θ, Z) where θ is measured in degrees.
- The displacement coordinate directions at P are dependent on the location of P as shown above by (ur, uθ, uz).
- Points on the z-axis will not have their displacement directions defined in this coordinate system since a unique value of θ cannot be defined on the z-axis. For the case of points on the z-axis, the basic rectangular system will be used for displacement output.