Description
The DLOAD entry defines time-varying boundary conditions for transient response problems. The boundary conditions can be either force boundary conditions or kinematic boundary conditions. The DLOAD entry defines a linear combination of time-varying boundary conditions defined via TLOAD1 entries.
Format
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| DLOAD | SID | S | S1 | L1 | S2 | L2 | S3 | L3 | |
| S4 | L4 | - etc. - |
Example
| DLOAD | 20 | 1.5 | 2.2 | 6 | -3.6 | 7 | 6.0 | 10 | |
| -4.5 | 12 |
| Field | Definition | Type | Default |
|---|---|---|---|
| SID | Load set identification number. | Integer > 0 | Required |
| S | Scale factor. This scale factor applies to all sets, Si, named on the DLOAD entry. | Real | Required |
| Si | Scale factors. The scale factor Si is applied only to the set Li. | Real | Required |
| Li | Set identification numbers for force boundary conditions or kinematic boundary conditions. | Integer > 0; SID ≠ Li | Required |
Remarks
- The scale for set Li listed on the DLOAD entry is S*Si. The scale factor S is a “global” scale factor for the DLOAD entry. The scale factor S is applied to all sets Li.
- Each Li must be unique from any other Li on the same entry.
- Dynamic load sets must be selected in the Case Control Section with DLOAD = SID.
- A DLOAD entry may not reference a set identification number defied by another DLOAD entry.
- TLOAD1 sets may be combined only through the use of the DLOAD entry.
- SID must be unique for all TLOAD1 entries.