DVMBRL1

Bulk Data Entry

DVMBRL1 – Relates Design Variables to Properties of MBD Entities

Description

Linearly relates a design variable to properties of an MBD entity using the equation:

Format

To relate the translational x component of stiffness value (K1) on a CMBUSH whose ID is 22 to Design Variable 5.

To relate the mass of a rigid boy whose ID is 3 to design variable 5.

Field	Contents
ID	Response identity. ID must be unique with respect to other DVMBRL1 and DVMBRL2 cards. No default (Integer > 0)
TYPE	MBD entity type to be related (see table below). No default (Character)
BID/EID	Body ID or Element ID number. When TYPE is PRBODY, this field is the ID number of a rigid body. When TYPE is CMBUSH(M), CMBEAM(M), or CMSPDP(m), this field is the ID number of a corresponding element. No default (Integer > 0)
PNAME	Property name, such as "A" or "L" (as in the documentation of the PRBODY, CMBEAM(M), CMBUSH(M), and CMSPDP(M) cards). No default (Character or Integer > 0)
C0	Constant in relationship equation. Default = 0.0 (Real)
DVIDi	DESVAR ID. No default (Integer > 0)
COEFi	Coefficient in relationship equation. Default = 1.0 (Real)

Comments

1.	MBD entity type information:

TYPE	Available PNAME
PRBODY	IXX
	IYY
	IZZ
	IXY
	IXZ
	IYZ
	X	X component of center of gravity.
	Y	Y component of center of gravity.
	Z	Z component of center of gravity.
CMBEAM / CMBEAMM	L	Undeformed length along the X–axis of the beam.
	A	Area of the beam cross-section.
	I1	Area moment of inertia in plane 1 about the neutral axis.
	I2	Area moment of inertia in plane 1 about the neutral axis.
	J	Torsional constant.
	K1 ~ K2	Area factor for shear.
CMBUSH / CMBUSHM	K1 ~ K3	Translational stiffness.
	K4 ~ K6	Rotational stiffness.
	B1 ~ B3	Translational damping.
	B4 ~ B6	Rotational damping.
	P1 ~ P3	Translational preload.
	P4 ~ P6	Rotational preload.
CMSPDP / CMSPDPM	K	Stiffness
	B	Damping
	L	Unstretched length of spring damper.
	PF	Preload force.

2.	This card is represented as an optimization design variable property relationship in HyperMesh.