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Spring Connection Boundary

To have the effective connection between the two spring connection boundaries, pairing and the spring constant must be set.

To pair the spring connection boundaries, proceed as follows.

It is assumed that the spring connection boundary conditions SPR1 and SPR2 are set to the different topologies.

How to Set the Spring Connection Boundary Pair (from Menu)

On the [Model] tab, go to

and click [Boundary Pair] .
- It is selectable only when a project is open.

[Boundary Pair] dialog box will show up.

How to Change the Spring Connection Boundary Pair (from Project Tree)

Select [Project] tab on the Project Tree, and double click [Pairing Setting (Contact/Joint Load/Spring)] in the [Boundary Condition].

[Boundary Pair] dialog box will show up.

The Boundary Pair Dialog Box Setup

Setting Item

Notes

List of Boundary Conditions

From the boundary conditions registered in the database,

the list of those for the boundary pair will appear.

Double click one. The [Edit Boundary Condition] dialog box will show up.

To remove it from the list, press the [Delete] button.

List of Pairs

The registered pairs will be listed here. Double click one.

The [Edit Boundary Pair] dialog box will show up and you can edit the data.

(For the spring connection, the type of spring constant and its value can be edited.)

To remove it from the list, press the [Delete] button.

Add

Selects the boundary conditions to pair up in the list.

The [Edit Boundary Pair] dialog box will show up. Press the OK button to complete the pairing.

Delete

Deletes the boundary conditions from each list.

Edit

Sets the spring constant type and component.

Setting Item

Notes

Spring Constant Type and Component

Selects either longitudinal component or XYZ components.

Longitudinal Component

The spring force in the longitudinal direction is generated.

Set the spring constant of the longitudinal component.

The spring force can be calculated by multiplying the spring constant

by the displacement in the extending direction of the spring topology ends to which the spring connection boundary is set.

In the nonlinear analysis, the direction of the spring force changes

in relation to the position of the pair.

XYZ Components

The spring forces occur in the X, Y, and Z directions.

Set the XYZ components of the spring constant.

The spring force can be calculated by multiplying the spring constant

by the relative displacement of the spring topology ends to which the spring connection boundary is set.

Time Dependency and Weight Function

Selectable in the static-step analysis and the transient analysis.

The time dependency of the spring constant is set.