/IMPDISP/FGEO
Block Format Keyword Describes the final position of a set of N nodes, input by coordinates.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/IMPDISP/FGEO/impdisp_ID/unit_ID | |||||||||
impdisp_title | |||||||||
fct_ID | part_ID | sens_ID | |||||||
Ascale | Tstart | Tstop | |||||||
node_ID1 | X1 | Y1 | Z1 | ||||||
etc | |||||||||
node_IDN | XN | YN | ZN |
Definition
Field | Contents | SI Unit Example |
---|---|---|
impdisp_ID | Imposed displacement block
identifier. (Integer, maximum 10 digits) |
|
unit_ID | Unit Identifier. (Integer, maximum 10 digits) |
|
impdisp_title | Final geometry block
title. (Character, maximum 100 characters) |
|
fct_ID | Time function
identifier. (Integer) |
|
part_ID | Spring part identifier. 5 (Integer) |
|
sens_ID | Sensor
identifier. (Integer) |
|
Ascale | Abscissa scale factor for
fct_ID. Default = 1.0 (Real) |
|
Tstart | Start
time. (Real) |
|
Tstop | Stop time. Default = 1030 (Real) |
|
node_IDi | Node
identifier. (Integer) |
|
XN | X
coordinate. (Real) |
|
YN | Y
coordinate. (Real) |
|
ZN | Z
coordinate. (Real) |
Comments
- A displacement is imposed to node_IDN from its initial position provided in /NODE, to its final position (XN, YN, and ZN).
- fct_ID is a scale factor on the imposed displacement, it should vary between 0 and 1.
- Abscissa scale factor,
Ascale is used to transform the function of time,
as:
(1) Where, is the function of fct_IDT.
- After Tstop, the nodes move freely.
- Initial node position N1 and final node position N2 can be defined as a spring N1N2 with zero stiffness. The spring part_ID is optional and can be used to simplify the input since a pre-processor can easily generate springs between an initial position and a final one.