CMSPDP

Bulk Data Entry

CMSPDP – Multi-body Spring Damper Element

Description

Defines a spring damper element without reference to a property entry for multi-body solution sequence.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
CMSPDP	EID	K	G1	G2	B	L	PF	TYPE

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
CMSPDP	3	34.5	223	324	0.0	1.0		TRANS

Field	Contents
EID	Unique element identification number. (Integer > 0)
K	Stiffness value. Default = 0.0 (Real or blank)
G1, G2	Grid point identification number. (Integer > 0)
B	Damping value. Default = 0.0 (Real or blank)
L	Unstretched length/angle of spring damper (Comment 3). Default = 0 (Real > 0.0 or blank)
PF	Preload force. Default = 0 (Real or blank)
TYPE	Type (TRANS or ROT; if blank, default: TRANS)

1.	The spring damper force is along the line segment connecting the grids G1 and G2.

2.	The positive preload force is a stretching force.

3.	If the unstretched length/angle of spring damper field (L) is blank:

(a) For a translational spring, OptiStruct calculates the length between the two grid points (G1, G2) of the spring damper for the value of L.

(b) For a rotational spring, L is set to 0.0.

4.	This card is represented as a spring element in HyperMesh.