DVPREL2

Bulk Data Entry

DVPREL2 – Relates Design Variables to Analysis Model Properties via Relationship Defined by User-supplied Equation

Description

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

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
DVPREL2	ID	TYPE	PID	PNAME/FID			EQID
	DESVAR	DVID1	DVID2	DVID3	DVID4	DVID5	DVID6	DVID7
		DVID8	DVID9	etc.
	DTABLE	LABL1	LABL2	LABL3	LABL4	LABL5	LABL6	LABL7
		LABL8	etc.

A rectangular bar of width W and depth D is defined using the PBAR card. The required fields on the PBAR for Area, I1 and I2 are all related to the width and depth, which are the design variables, by the referenced equations.

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
DVPREL2	201	PBAR	1	4			101
	DESVAR	5	6
DVPREL2	203	PBAR	1	5			102
	DESVAR	5	6
DVPREL2	204	PBAR	1	6			103
	DESVAR	5	6

This example is the same as example 1 (above), except that it defines PNAME.

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
DVPREL2	201	PBAR	1	A			101
	DESVAR	5	6
DVPREL2	203	PBAR	1	I1			102
	DESVAR	5	6
DVPREL2	204	PBAR	1	I2			103
	DESVAR	5	6

Associated Cards

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
DESVAR	5	W	6.0	1.0	10.0
DESVAR	6	D	5.0	1.0	20.0
DEQATN	101	AREA(W,D) = W*D
DEQATN	102	I1(W,D) = (WD*3)/12
DEQATN	103	I2(W,D) = (DW*3)/12
PBAR	1	222	0.1	19e-4	1e-3

Field	Contents
ID	Relationship identification number. ID must be unique with respect to other DVPREL1 cards. No default (Integer > 0)
TYPE	Property type to be related (see DVPREL - Types). No default (Character)
PID	Property identification number. When PTYPE is PCOMPG, G# may be used where # is the GPLYID. When PTYPE is PCOMPP, P# may be used where # is the PLY ID. See comment 5. No default (Integer > 0)
PNAME/ FID	Property name, such as "A" or "T" (as in the documentation of the property cards), or field number in property card (see table below). For the PSHELL property 12I/T3, only the filed number (6) is allowed. For PBARL and PBEAML only property names are allowed, as different sections use different fields. No default (Character or Integer > 0)
EQID	Equation ID of DEQATN data. No default (Integer > 0)
DESVAR	Indicates DESVAR ID numbers follow.
DVIDi	DESVAR ID. No default (Integer > 0)
DTABLE	Indicates DTABLE labels follow.
LABLi	Constant label on DTABLE card. No default (Character)

Comments

1.	Type cannot be PSOLID.

2.	When Type is PBARL or PBEAML, users should pay close attention to the variable ranges to avoid invalid dimensions.

3.	PBEAML definitions with more than one section definition may not be referenced by a DVPREL1.

4.	Properties of PBARL/PBEAML have to be controlled through DIMs (cannot be controlled directly), with the exception of NSM.

5.	When TYPE is PCOMPG, either global plies or property specific plies may be selected.

To select property specific plies, the format is similar to that used for other property types where the property identification number of the PCOMPG is entered in the PID field and then either PNAME or FID is used to identify the value to be related. In this scenario, only the property with an ID given in the PID field is affected.

To select global plies, G# is entered in the PID field where # is the GPLYID of a global ply. In this instance, FID is not applicable so T or THETA is used in the PNAME field to relate either the thickness or orientation, respectively. In this scenario, all plies that use the given GPLYID are affected.

When TYPE is PCOMPP, P# is entered in the PID field where # is the ID of a PLY entity. In this instance, FID is not applicable so T or THETA is used in the PNAME field to relate either the thickness or orientation, respectively.

6.	In the PCOMP property, the damping coefficient, GE is a designable value and can be referenced in the PNAME/FID field.

7.	This card is represented as an optimization designvariable in HyperMesh.