Description
The TABLED2 entry defines a parametric tabular function for use in generating time-dependent dynamic loads.
Format
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| TABLED2 | TID | X1 | |||||||
| x1 | y1 | x2 | y2 | x3 | -etc.- |
Example
| TABLED2 | 16 | -12.5 | |||||||
| 2.0 | -3.5 | 3.0 | -5.2 | 4.0 | 5.9 | 8.0 | 6.4 | ||
| SKIP | SKIP | 10.0 | 6.7 | ENDT |
| Field | Definition | Type | Default |
|---|---|---|---|
| TID | Table identification number. | Integer > 0 | Required |
| X1 | Table parameter. | Real | 0.0 |
| xi, yi | Tabular values. | Real | Required |
Remarks
- xi must be ascending order.
- Discontinuities may not be specified between any two points.
- At least one continuation entry must be specified.
- Any xi-yi pair may be ignored by placing SKIP in either of the two fields.
- The end of the table is indicated by the existence of ENDT in either of the two fields following the last entry. Any continuations that follow the entry containing the end-of-table flag ENDT will be ignored.
- TABLED2 uses the following algorithm:
y = yT(x-x1)
where x is input to the table and y is returned. The table look-up is performed using linear interpolation within the bounds of the x values of the table. Outside the bounds the function is assumed to be constant. That is, if x is less than x1, then the function evaluates as y1. If x is greater than xN, then the function evaluates as Yn.