DLOAD (Dynamic Load Combination [Superposition])

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

1. 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.
2. Each Li must be unique from any other Li on the same entry.
3. Dynamic load sets must be selected in the Case Control Section with DLOAD = SID.
4. A DLOAD entry may not reference a set identification number defied by another DLOAD entry.
5. TLOAD1 sets may be combined only through the use of the DLOAD entry.
6. SID must be unique for all TLOAD1 entries.