Dynamic Load Tabular Function, Form 4
Description: Defines coefficients of a power series used in generating time-dependent dynamic loads.
Format:
Example:
| Field | Definition | Type | Default |
|---|---|---|---|
| TID | Table identification number. | Integer > 0 | Required |
| X1 | Table parameter. | Real | 0.0 |
| X2 | Table parameter. | Real ≠ 0.0 | Required |
| X3 | Table parameter. | Real, X3 < X4 | Required |
| X4 | Table parameter. | Real | Required |
| Ai | Coefficients. | Real | Required |
Remarks:
- At least one continuation entry must be specified.
- The end of the table is indicated by the existence of ENDT in the field following the last entry. Any continuations that follow the entry containing the end-of-table flag ENDT will be ignored.
- TABLED4 uses the algorithm
where x is input to the table, y is returned. Whenever x < X3, X3 is used for x, and whenever x > X4, X4 is used for x. There are N + 1 entries in the table. No warning messages are issued if table data is input incorrectly.
- For frequency dependent loads, xi are measured in cycles per unit time.