/BEAM
Block Format Keyword Describes beam elements. Two properties (/PROP/TYPE3 (BEAM) and /PROP/TYPE18 (INT_BEAM)) are available for beam elements. The properties describing a beam element are all defined in a local beam coordinate system.
Format
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
|---|---|---|---|---|---|---|---|---|---|
| /BEAM/part_ID | |||||||||
| beam_ID | node_ID1 | node_ID2 | node_ID3 | ||||||
Definition
| Field | Contents | SI Units Example |
|---|---|---|
| part_ID | Part identifier of the
block. (Integer, maximum 10 digits) |
|
| beam_ID | Element
identifier. (Integer) |
|
| node_ID1 | Node identifier
1. (Integer) |
|
| node_ID2 | Node identifier
2. (Integer) |
|
| node_ID3 | (Optional) Node identifier
3. (Integer) |
Comments
- The identifier (ID) must be unique in each element family, but it is advised for each element type to have a unique element identifier in the global model.
- More than one beam block may be used to define a part.
- Any number of beams may be defined in one block.
- Local coordinate system of beam:
node_ID1 and node_ID2 define local X-axis.
node_ID1, node_ID2 and node_ID3 define local XY plane at time t =0.
The third node is only used to define initial local frame position.
Z axis is orthogonal to the XY plane.
Figure 1.If node_ID3 is not defined or equal to node_ID1 or node_ID2, the local XY plane is defined using the global Y axis or the global Z axis in cases where node_ID1 and node_ID2 are along global Y axis.