Spring

To create Spring (Elastic boundary) for an Analysis model.

Elastic boundary (spring) element is mainly used to avoid instability of elements lacking in degrees of freedom (such as truss element), connected to each other or to consider the stiffness of adjacent structures or ground at the boundaries of a model.

Elastic boundary (spring) element retains 2 translational degrees of freedom and 1 rotational degree of freedom per each node in the global coordinate system. The translational elastic component is expressed in terms of force per unit length, and the rotational elastic component is expressed in terms of moment per unit angle in radian.

In general cases, displacement boundary conditions are assigned to the boundaries of an Analysis model but in special cases such as Structural Analysis or Dynamic Analysis, springs are used to assign elastic boundary conditions.

Applicable Modules:

From the Main Menu, select Model > Element > Spring

From the Command Line, type 'SpringElement' or 'CES'

Mesh Set

Enter the name of the mesh set. Click  to Add, Modify or Delete mesh sets.

Structural Property

Enter the Structural Properties of the Spring element. Click to Add, Modify or Delete Structural Properties.

Select Node(s)

Multiple nodes may be selected for the same spring.

The dialog box will be initialized.  

After creating the pile elements, the dialog box will close upon clicking.

Click   or press the ESC key to close the dialog box.  

creating the spring, the work process will switch to the state of Select Node upon clicking.