/SENSOR/DIST
Block Format Keyword Describes a sensor which is used to activate or deactivate an object according to distance.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/SENSOR/DIST/sens_ID/unit_ID | |||||||||
sens_title | |||||||||
Tdelay | |||||||||
node_ID1 | node_ID2 | Dmin | Dmax | Tmin | Dflag |
Definition
Field | Contents | SI Unit Example |
---|---|---|
sens_ID | Sensor
identifier. (Integer, maximum 10 digits) |
|
unit_ID | Optional unit
identifier. (Integer, maximum 10 digits) |
|
sens_title | Sensor
title. (Character, maximum 100 characters) |
|
Tdelay | Time
delay. (Real) |
|
node_ID1 | Node identifier
1. (Integer) |
|
node_ID2 | Node identifier
2. (Integer) |
|
Dmin | Distance
minimum. Default = -1E30 (Real) |
|
Dmax | Distance
maximum. Default = 1E30 (Real) |
|
Tmin | Minimum time duration
to satisfy criterion. (Real) |
|
Dflag | (Optional)
Deactivation flag. (Integer) |
Comments
- Sensors can be used to activate airbags, imposed forces, pressures, and fixed velocities.
- Sensors can be used to activate or deactivate these elements: brick, quad, shell, truss, beam, spring or 3N Shell with /ACTIV.
- For Sensor type
DIST, nodal distance N1N2 between node_ID1 and node_ID2 is defined as:
Activation criterion is reached if or and sensor timer is set (Tcrit). The criterion must be satisfied for the duration of time interval Tmin, otherwise the sensor time counter Tcrit is reset once again. Then the sensor is activated after an additional time delay.
- If deactivation flag Dflag = 1, the sensor may be deactivated once again when the nodal distance falls again between the values . Further reactivations and deactivations become possible depending on the same criteria.