Termination Sensors

Andy@LamteqSolutions
Andy@LamteqSolutions Altair Community Member
edited October 2020 in Community Q&A

Hi all,

 

Hopefully a really simple one to solve.

I have a simple model, working as a demonstrator.

2 Components, one locked in place whilst the other is driven into it. I have a contact between the two.

 

I need the simulation to terminate when the contact force reaches 100kN. I believe the strategy is /STOP/LSENSOR. Sensor = /Sensor/INTER... TYPE 6.

However, I cannot get the simulation to kill at 100kN.

 

Here is the sensor (Fmin = -1, Fmax = 100).

 

## Sensors
##--------------------------------------------------------------------------------------------------
/SENSOR/INTER/1
SENSOR                                                                                             
                   
         1                          -1.0               100.0                 0.0

 

 

The issue seems to be when the simulation starts, the sensor activates. I've run the model without the sensor and it ranges from 0 to 200kN. I have tried varying the numbers but that does not alter the outcome, every attempt begins with sensor being activated.

 

HELP!!!!

 

Many thanks in advance.

Andy

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2017

    Hi Andy,

    As a workaround, select the direction as Normal Force and provide only Fmax. 

    If you still face issues, please share the model (starter and engine files) files.

     

  • Andy@LamteqSolutions
    Andy@LamteqSolutions Altair Community Member
    edited January 2017

    Many thanks George,

     

    I managed to get it working. Here's what worked in the end....

     

    #---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
    /SENSOR/INTER/1
    SENSOR
    #         Tdelay
                       0
    #   Interf       DIR                Fmin                Fmax                Tmin
             1        NF               -50000              3200                    0.000

  • akasht
    akasht Altair Community Member
    edited June 2020
    Altair Forum User said:

    Many thanks George,

     

    I managed to get it working. Here's what worked in the end....

     

    #---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
    /SENSOR/INTER/1
    SENSOR
    #         Tdelay
                       0
    #   Interf       DIR                Fmin                Fmax                Tmin
             1        NF               -50000              3200                    0.000

    how did you work out in this method as you need to stop at 100 kn but in this setup you used -50000 and 3200 .we also have the same issue but couldn't able to find out the solution ,please guide us .thanks in advance .

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