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*B3GEN
Data format:
An arbitrary number of lines with 13 values each.
NBBEA NEL NELI JO JOI JK JKI JE JEI IPRO IMAT XLTOT
...
Status:
Optional
Purpose:
To define series of trinodal beam elements based on quadratic FE shape
function (with 6 degrees of freedom by nodes).
Restriction:
The total number of elements (all types) may not exceed MAXEL . The nodes JO,
JK, JE and all the other nodes that will be used for the generated elements
must have been previously defined.
Details :
| Parameter | Description |
|---|---|
| NBBEA | Number of beam elements to be generate |
| NEL | Identification number of the first element |
| NELI | Element number increment |
| JO | Origin node of the first element |
| JOI | Increment on the origin node number |
| JK | Intermediate node of the first element |
| JKI | Increment on the intermediate node number |
| JE | End node of the first element |
| JEI | Increment on the end node number |
| IPRO | Index in the table of elementary mechanical and geometrical properties (previously defined by keyword *BEAMPRO) |
| IMAT | Material index (previously defined by keyword *MAT) |
| XLTOT | The length of each generated element is XLO = XLTOT/NBBEA. If XLO=0, the element length is taken from the corresponding properties keyword (referred by IPRO). If XL0 is still null the element length is the initial distance between the nodes composing it. |
Note
The program will generate NBBEA elements with properties IPRO and material IMAT :
- El. NEL connecting nodes JO and JE through JK
- El. NEL+NELI connecting nodes JO+JOI and JE+JEI through J +JKI...
- EL. NEL+(NBBEA-1)*NELI connecting nodes JO+(NBBEA-1)*JOI and JE+(NBBEA-1)*JEI through JK+(NBBEA-1)*JKI
The beam elements are given in an initially unstressed configuration.
Examples :
*B3GEN
2 16 23 16 24 17 24 18 24 2 1
Two beam elements will be generated from element 16 with an increment of 23. Element 16 will start at node 16, pass by node 17 and end at node 18, Element 39 (16+23) will start at node 40 (16+24), pass by node 41 (17+24) and end at node 42 (18+24).
These beam elements will have the mechanical properties previously defined by the index 2 of *BEAMPRO and a material index of 1 previously defined by *MAT.
*B3GEN
15 1 1 1 2 2 2 3 2 1 1
Fifteen beam elements will be generated from element 1, with an increment of one. Element 1 will start at node 1, pass by node 2 and end at node 3. Element 2 will start at node 3 (1+2), pass by node 4 (2+2) and end at node 5 (3+2), Element 3 will start at node 5 (3+2), pass by node 6 (4+2) and end at node 7 (5+2), and so on...
These beam elements will have the mechanical properties previously defined by the index 1 of *BEAMPRO and a material index of 1 previously defined by *MAT.
*B3GEN
2 16 23 16 24 17 24 18 24 2 1
Two beam elements will be generated from element 16 with an increment of 23. Element 16 will start at node 16, pass by node 17 and end at node 18, Element 39 (16+23) will start at node 40 (16+24), pass by node 41 (17+24) and end at node 42 (18+24).
These beam elements will have the mechanical properties previously defined by the index 2 of *BEAMPRO and a material index of 1 previously defined by *MAT.
