To assign a linear spring in one or more degrees of
freedom to a support, use the following procedure.
You may want to change the system of input units to convenient values
for your spring constants before creating a spring support type.
In
STAAD.Pro, linear spring constants are
specified as part of
fixed but
support types.
-
Select the nodes that will have the same support condition.
-
On the
Specifications ribbon tab, select the
Custom tool in the
Supports group.
The
Create Supports dialog opens to the
Fixed But tab.
-
In the
Define Springs group, type the linear spring
constant to use for each translational and rotational spring direction.
-
KFX - translation in the
global x direction
-
KFY - translation in the
global y direction
-
KFZ - translation in the
global z direction
-
KMX - rotation about the
global x axis
-
KMY - rotation about the
global y axis
-
KMZ - rotation about the
global z axis
Note: If a spring
constant is specified in a direction, then the corresponding degree of freedom
cannot be released. A given support type can have a mix of releases and
springs, but only in different degrees of freedom.
For example, a fixed but support could have MX,
MY, and MZ released as in a pinned support and also have spring constants
defined in FX, FY, and FZ.
-
Either:
To… | Do the following… |
---|
add the support type to the
model and assign to the current node selection |
click
Assign. |
add the support to the
model for later assignment |
click
Add. |
The dialog closes.
You can now assign tension-only, compression-only, or multi-linear
springs to these same supported nodes if necessary.