Define Attackpoint for Force/ Simple Question?

Hello everyone,

 

i do a FEM Project with HyperMesh and now im at a point where i need some help (First time with HyperMesh)

 

I have to do a FEM analysis where various forces attack a beam. The Problem is that the Beam is not symmetrical but i have to define a Force in direction to the Z-axis. (Picture 2) The Force should attack at the center of gravity  otherwise the beam will be twisted. 

 

My Question is:

 

Where/ how can i define that  point (cog) or force where the beam only bends down and dont twist?

 

previous attempts:

 

• Pic 3. --> But it twisted. It is logical because of the lever arm 
• Singe Force on the Top of the beam near the CoG but also twisted
•  

My Solver is Optistruct. 

 

Pic1. 

<?xml version="1.0" encoding="UTF-8"?>

 

Maybe someone can help me /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' />

Thanks

 

Pic.2  (Force F has to been define )

<?xml version="1.0" encoding="UTF-8"?>

Pic 3

<?xml version="1.0" encoding="UTF-8"?>