# 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

To relate the Force value on grid 259 to Design Variable 5.
(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)

FORCE
Indicates that the designed load references a FORCE entry.
MOMENT
Indicates that the designed load references a MOMENT entry.

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)

F
N1/N2/N3

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)

${L}_{i}={C}_{0}+\sum \left({C}_{i}^{coef}*D{V}_{i}\right)$
${L}_{i}$
${C}_{0}$
${C}_{i}^{coef}$
$D{V}_{i}$