/DVPREL2

Optimization Keyword Relates a design variable to an analysis model property using a relationship defined by a /DEQATN card.

The equation inputs come from the referenced /DESVAR values and the constants defined on the /DTABLE card.

Format

Field	Contents	SI Unit Example
`dvp_ID`	Identification number. (Integer > 0)
`title`	Title. (Character, maximum 100 characters)
`prop_typ`	Property type. The type is specified immediately after the corresponding /PROP, as: 1 = 1 /PROP/TYPE1 (SHELL) = 2 /PROP/TYPE2 (TRUSS) = 3 /PROP/TYPE3 (BEAM) = 11 /PROP/TYPE11 (SH_SANDW) = 13 /PROP/TYPE18 (INT_BEAM) (Integer ≥ 0)
`prop_ID`	Property identifier . (Integer > 0)
`prop_fid`	Property field identifier to be related with design variable. Depending on various property types (`prop_typ`), the available options are different. 1 (Integer > 0)
`EQID`	/DEQATN identifier that defines the response relationship. (Integer > 0 or blank)
`VARTYPE#`	Variable type. =1 DESVAR =2 DTABLE (Integer > 0 or blank)
`ID#`	Identifier variables defined in `VARTYPE#`.. When `VARTYPE` is DESVAR, or DTABLE, this list of IDs reference entities of the defined `VARTYPE`.

The specific property field ID's that are related to the design variables are listed based on the following property types:
prop_type = 1 (/PROP/SHELL):

prop_fid

1

Thickness

prop_type = 2 (/PROP/TRUSS):

prop_fid

1

Area

prop_type = 3 (/PROP/BEAM):

prop_fid

1

Area

2

Iyy

3

Izz

4

Ixx

prop_type = 11 (/PROP/SH_SANDW):

prop_fid

> 0

Ply Thickness

< 0

Ply Orientation Angle

prop_type = 18 (/PROP/INT_BEAM):

prop_fid

1

First size of the predefined section L1

2

Second size of the predefined section L2
This card is represented as an optimization design variable in HyperMesh and HyperCrash.