!SPRING

Definition of spring boundary conditions

Parameters

GRPID = Group ID

** 2nd line and later **

(2nd line) NODE_ID, DOF_id, Value

Variable	Attribute	Description
NODE_ID	I/C	Node number or node group name
DOF_id	I	Constrained degree of freedom
Value	R	Spring constant

Example

!SPRING, GRPID=1
  1, 1, 0.5

Notes

• !SPRING can be used in static analysis and implicit dynamic analysis.
• GRPID is used to activate spring supports for each step by being referenced from !STEP on the LOAD line.