CMSPDP

Bulk Data Entry Defines a spring damper element without reference to a property entry for multibody solution sequence.

Format

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

Example

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

Definitions

Field Contents SI Unit Example
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. 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)

  

Comments

  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:
    1. For a translational spring, OptiStruct calculates the length between the two grid points (G1, G2) of the spring damper for the value of L.
    2. For a rotational spring, L is set to 0.0.
  4. This card is represented as a spring element in HyperMesh.