DVLREL1
Bulk Data Entry Linearly relates a design variable to an analysis model element.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
DVLREL1 | ID | TYPE | SID | LNAME | C0 | ||||
ATT1 | ATT2 | ||||||||
DVID1 | COEF1 | DVID2 | COEF2 | etc. |
Example
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
DVLREL1 | 88 | FORCE | 1 | F | 0.0 | ||||
259 | 1 | ||||||||
5 | 1 | ||||||||
DESVAR | 5 | 5.00 | 1.50 | 9.90 |
Definitions
Field | Contents | SI Unit Example |
---|---|---|
ID | Relationship
identification number. ID must be unique with respect to other
DVLREL1 cards. No default (Integer > 0) |
|
TYPE | Loading type.
No default |
|
SID | Identification number of a
FORCE or MOMENT Bulk Data
Entry. This selection depends on the value of the
TYPE field. No default (Integer > 0) |
|
LNAME | Load identifier.
No default |
|
C0 | Constant in the design
variable and load relationship equation. Default = 0.0 (Real) |
|
ATT1 | Identifies the grid point
at which the designed load is applied. No default (Integer > 0) |
|
ATT2 | Identifies the coordinate
system for the designed load reference. No default (Integer > 0) |
|
DVIDi | DESVAR
identification number. No default (Integer > 0) |
|
COEFi | Coefficient in design
variable and load relationship equation. Default = 1.0 (Real) |
Comments
- The relationship between analysis model loading and
design variable is:
(1) Where,- The designed load
- The constant
- The coefficient
- The design variable
- Multiple loads with the same set of SID, G, and, ATT2 reference are not allowed. OptiStruct will error out in such cases.
- DVLREL1 and DVLREL2 entries are supported for Optimization based on Static Analysis only.