# DVGRID

Bulk Data Entry Defines the relationship between a design variable and a grid point location.

## Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
DVGRID DVID GID CID COEFF X Y Z

## Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
DVGRID 1 1032 0 1.0 1.0 0.0 0.0

## Definitions

Field Contents SI Unit Example
DVID DESVAR identification number.

(Integer > 0)

GID GRID identification number.

(Integer > 0)

CID Coordinate system identification number. A CID of zero or blank references the basic coordinate system.

Default = 0 (Integer ≥ 0)

COEFF Multiplier to the vector defined in fields 6, 7, and 8.
X, Y, Z Components of the vector defining the perturbation of the grid in the coordinate system defined by CID.

${\text{location}}_{\text{new}}={\text{location}}_{\text{GRID}}+{\sum }_{\text{j}} {\text{coef}}_{\text{j}}\left[\begin{array}{c}\text{x}\\ \text{y}\\ \text{z}\end{array}\right]{\text{}}_{\text{j}}{\left[\text{N}\right]}^{\text{T}}{\text{xDV}}_{\text{j}}$
Where, ${\mathrm{DV}}_{j}$ is the value of design variable j and ${\left[\mathrm{N}\right]}^{\mathrm{T}}$ is the coordinate transformation matrix based on the CID and the GRID location.