Learning Forum

[Max4]

Hi,

I wrote the following UDF for a moving valve (6DOF).

 

I want to add a constrained location, but I don´t find how to code this in the UDF.

Thank you.

 

Regards,

Maxime

[Keyur Kanade]

i am not sure exact command for that. can you please elaborate why do you need it. 

i think the udf you have should work as it is. 

[Max4]

I need it, in order to simulate the opening of a valve thanks to pressure forces. I prefer use an UDF as the interface of the 6DOF Properties.

Thank you for your opinion. I just want to add a constrained location, so that the valve doesn´t move to far.

Regards,

Maxime

[Keyur Kanade]

simple workaround may be using if statement like following for position and force output.

 

if (y <= del)

        vel = 2;

      else

        vel = 0

[Max4]

I don´t want to set a velocity for the valve. I just want that it opens when the pressure forces is higher than the spring force.

[Keyur Kanade]

i just gave you an example. 

you can use e.g. valve_movement_y in your udf. 

if (valve_movement_y <= 5)

   net_force = xyz

else 

   net_force = abc 

[Max4]

Ok, I understand it more clearly. Thank you for your help.

Regards,

Maxime

[Max4]

On the interface of the Six DOF Properties, the Location is the distance between the origin of the XY axis and the center of gravity of the object?

[Yagiz Guzelcan]

This is the local location of the the element you are interested in. You do not need to know the distance between the origin and the CG of the part.