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.

Example 1

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

Example 2

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 identity. Each DVPREL2 card must have a unique ID. No default (Integer > 0)
TYPE	Property type to be related (see table below). No default (Character)
PID	Property Identification Number or, when PTYPE is PCOMPG, G# may be used, where # is the GPLYID. 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	DESVAR flag indicating DESVAR ID numbers follow.
DVIDi	DESVAR ID. No default (Integer > 0)
DTABLE	DTABLE flag indicating DTABLE labels follow.
LABLi	Constant label on DTABLE card. No default (Character)

Types

Depending on the TYPE entry, the FID of the appropriate design parameter can be determined from the table below.

Type	Field 1	Field 2	Field 3	Field 4	Field 5	Field 6	Field 7	Field 8	Field 9	Field 10
CONM2					M	X1	X2	X3
FID 11-20		I11	I12	I22	I13	I23	I33

Type	Field 1	Field 2	Field 3	Field 4	Field 5	Field 6	Field 7	Field 8	Field 9	Field 10
PBAR				A	I1	I2	J	NSM
FID 11-20		C1	C2	D1	D2	E1	E2	F1	F2
FID 21-30		K1	K2	I12

Type	Field numbers are not allowed for PBARL.
PBARL	DIMi	NSM

Type	Field 1	Field 2	Field 3	Field 4	Field 5	Field 6	Field 7	Field 8	Field 9	Field 10
PBEAM				A(A)	I1(A)	I2(A)	I12(A)	J(A)	NSM(A)
FID 11-20		C1(A)	C2(A)	D1(A)	D2(A)	E1(A)	E2(A)	F1(A)	F2(A)
FID 21-30
FID 31-40		K1(A)	K2(A)			NSI(A)	NSI(B)
FID 41-50		M1(A)	M2(A)	M1(B)	M2(B)	N1(A)	N2(A)	N1(B)	N2(B)

Type	Field numbers are not allowed for PBEAML.
PBEAML	DIMi	NSM

Type	Field 1	Field 2	Field 3	Field 4	Field 5	Field 6	Field 7	Field 8	Field 9	Field 10
PBUSH				K1	K2	K3	K4	K5	K6

Type	Field 1	Field 2	Field 3	Field 4	Field 5	Field 6	Field 7	Field 8	Field 9	Field 10
PCOMP			Z0	NSM
FID 11-20			T1	THETA1			T2	THETA4
FID 21-30			T3	THETA3			…	…
…			…	…			…	…

Type	Field 1	Field 2	Field 3	Field 4	Field 5	Field 6	Field 7	Field 8	Field 9	Field 10
PCOMPG			Z0	NSM
FID 11-20				T1	THETA1
FID 21-30				T2	THETA2
…				…	…

Type	Field numbers do not apply for PCOMPG when referencing global plies. See comment 5.
PCOMPG	T	THETA

Type	Field 1	Field 2	Field 3	Field 4	Field 5	Field 6	Field 7	Field 8	Field 9	Field 10
PELAS			K1		S1

Type	Field 1	Field 2	Field 3	Field 4	Field 5	Field 6	Field 7	Field 8	Field 9	Field 10
PMASS			M		M		M		M

Type	Field 1	Field 2	Field 3	Field 4	Field 5	Field 6	Field 7	Field 8	Field 9	Field 10
PROD				A			NSM

Type	Field 1	Field 2	Field 3	Field 4	Field 5	Field 6	Field 7	Field 8	Field 9	Field 10
PSHELL				T		12*I/T3		TS/T	NSM
FID 11-20		Z1	Z2

Comments

Type cannot be PSOLID.
When Type is PBARL or PBEAML, users should pay close attention to the variable ranges to avoid invalid dimensions.
PBEAML definitions with more than one section definition may not be referenced by a DVPREL1.
Properties of PBARL/PBEAML have to be controlled through DIMs (i.e., cannot be controlled directly), with the exception of NSM.
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.

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