In Door Slam Test What is the Force Reaction Direction?

Ankush W

Hello Team,

I am trying to extract forces at door latch point when it hits to the striker point during door slam event in MotionView.

Reference: https://2021.help.altair.com/2021.2/hwsolvers/ms/topics/solvers/ms/sim_door_close_intro_t.htm#mv-2021-simulating-an-automotive-door-closure-event

We can ask forces using expression in output as show in images below.

(Reference: https://2021.help.altair.com/2021/hwsolvers/ms/topics/solvers/ms/fx.htm?zoom_highlightsub=Fx)

 

As you can see, door slams in Y direction (in image above). When I ask for forces in Y direction using expression as "FY({m_door.idstring},{m_car.idstring},{m_car.idstring})", I am getting max force in FX and not in FY.

Even if I rotate the model and slamming the door in other direction, I get max force in FX only. 

So my Queries are;

1) Does it mean, when we define two points in expression that defines X direction irrespective of other co-ordinate systems?

2) continue to query 1, if so then what are the directions of other two axes?

Please help me on the same.

Thank you!

BR,

Ankush W

Community-Pasted-Attachment-1680587187980.png

AnılBurak

Hi Ankush,

When I applied the method you tried, I got the same result as you. I tried to find the force coming to the door in the y direction by selecting force instead of expression in Output. When I did it this way, I observed the force on the Y axis as the max force. You can find the graphics in the attachment

motion_view.mp4