/DVPREL1

Optimization Keyword

/DVPREL1 – Relates Design Variables to Analysis Model Properties

Description

Linearly relates a design variable to an analysis model property using the equation.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/DVPREL1/dvp_ID
title
prop_typ	prop_ID	prop_fid	C0
DVID1	COEF1
DVID2	COEF2
...	...
DVIDN	COEFN

Field	Contents
dvpl_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 shown below (Comment 1). (Integer > 0) = 1: /PROP/SHELL = 2: /PROP/TRUSS = 3: /PROP/BEAM = 11: /PROP/SH_SANDW
prop_ID	Property identifier (/PROP/…) (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 (Comment 1). (Integer > 0)
C0	Constant in the equation that defines the relationship between the design variable and the property. Default = 0.0 (Real)
DVIDi	Design variable identifier (/DESVAR) that is related to the property. No default (Integer > 0)
COEFi	Coefficient in the equation that defines the relationship between the design variable and the property. Default = 1.0 (Real)

/DVPREL1/1

related design variable

### Related design variable to design variable identifier 1 (defined in /DEVSVAR) is thickness of shell property ID 2000329 (which defined with /PROP/SHELL)

### prop_typ=1: property type is /PROP/SHELL

### prop_ID=2000329 : property identifier is 2000329

### prop_fid=1: Thickness due to prop_typ=1

### DVID1=1: Design variable identifier (/DESVAR) is 1

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

# prop_typ prop_ID prop_fid C0

1 2000329 1 0.0

# DVID1 COEF1

1 1.0

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

1.	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 = Thick

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

2.	This card is represented as an optimization design variable in HyperMesh and HyperCrash.