crane.pdf

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Z88 A URORA ® E XAMPLE M ANUAL
Example 13: Creating structures and element parameters
(Truss No. 9, plane, in 2D)
Cross section:
is a registered trademark (Nr. 30 2009 064 238) of Univ. Prof. Dr.-Ing. Frank Rieg
Example Manual
Example 13: Structures and element parameters (Truss No. 9, plane, in 2D)
Z88 Aurora features an integrated editor that helps you to create structural frameworks
made of trusses and beams. You can declare nodes by stating their coordinates, while
the elements can be created directly via the viewport (picking) or within the graphical
user interface. In this example the procedure is shown for a simplified independent
crane. For your convenience the readymade input files are also available.
Input files:
b27_i1.txt
Structural information
b27_i2.txt
Boundary conditions
Use
and
to create a new project folder, in this case “Example_13” , then
confirm by pressing Enter and close the dialog with OK . Now the framework shown in
Figure 1 can be created.
Cross section:
Figure 1: Model of a simplified crane
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Example Manual
The shown node (Arabic numerals) and element numbers (Roman numerals)
have been chosen arbitrarily and may be replaced at will. Mind that in this case
the constraints have to be adjusted as well.
Switch to the preprocessor using
. Select
to create a new finite ele-
ment structural framework and a new menu will appear at the bottom of the window
Figure 2: Creating new nodes
In order to add a node, supply the corresponding x-, y- und z-coordinates and use
. This must be repeated for each node. After selecting a node in the list the val-
ues can be edited with
or removed with
. For the example, as shown in
Figure 1 , the following coordinates must be used:
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Example Manual
Node
x-coordinate
y-coordinate
z-coordinate
1
0
0
0
2
3000
0
0
3
0
5000
0
4
3000
5000
0
5
1500
8000
0
6
8000
11000
0
Now change the menu clicking
to add the element coincidence. Since this is a
model in a plane, choose truss No. 9, plane, in 2D as element type ( Figure 3 ).
Figure 3: Adding the coincidence
Pick two nodes in the viewport pressing
and using the left mouse button and use
, to confirm your choice. Clicking
will add the element to the list.
Corresponding to Figure 1 the following elements have to be added:
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Example Manual
Element
Type
Node 1
Node 2
1
9
1
3
2
9
2
3
3
9
2
4
4
9
3
4
5
9
3
5
6
9
4
5
7
9
4
6
8
9
5
6
The buttons
and
save the newly created structure and close the menu.
To assign a material you can use
to open the material definition tab. Select
the material “ Structural Steel S235JR ” and assign it with
. Save the material defi-
nition with the
button and close the tab using
.
Now go to the section “ Parameters for elements ” and open the parameter menu
( Figure 4 ) with
.
Figure 4: Menu for the declaration of element parameters
Be sure to check the “ all elements ” box, so that your parameters will be applied to the
whole model. You can use “ Edit entry table ” to deactivate all entries not needed for your
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