/SENSOR/RWALL

Block Format Keyword Describes the sensors used to activate or deactivate an object according to rigid wall force.

Format

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)
`T`_delay	Time delay. (Real)	$[s]$
`DIR`	Force direction. = blank Activation at first force =FN Normal Force =FT Tangent Force =X Force in X direction =Y Force in Y direction =Z Force in Z direction (Integer)
`Fmin`	Minimum force. Default = 0 (Real)	$[N]$
`Fmax`	Maximum force. Default = 0 (Real)	$[N]$
`T`_min	Minimum time duration before activation when criteria is reached. (Real)	$[s]$

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 RWALL:
The sensor is activated one cycle after impact on the rigid wall.

A sensor is used for one rigid wall. You can use several type RWALL sensors.

Figure 1.
Sensor is activated when contact on the rigid wall is detected, and the following force criteria is satisfied:
- $F_{R W A L L} < F_{\min}$ or $F_{R W A L L} > F_{\max}$ during T_min
Dir defines Force direction:

FN

Normal Force

FT

Tangent Force

X

Force in X direction

Y

Force in Y direction

Z

Force in Z direction

Sensor is deactivated if the contact is lost
Values for force and moment component limits in the force-based sensors (RWALL) can be positive and negative. Normal, tangent, total force and moment values are always positive.