Cancel
Showing results for 
Search instead for 
Did you mean: 

How to define an non-constant line load

Gears Phenom Gears Phenom
Gears Phenom

Hello experts, short question:

 

I use Simcenter NX 10 for NASTRAN (SOL101 and others ):

 

How can I define a line load (as force in N/mm or moment in Nmm/mm) on geometry edges when the line load isn't constant but increasing like triangular or trapezoidal.

 

For constant distribution I've found

 

Force-load-on-an-Edge

 

There it's illustrated by @JimB that using RBE3 yields in the correct distribution with specific lengths of element edges are taken into account.

 

Additionally I could see that in definition dialogue for "Force"  there is the type "Edge-Face". But it deals also only with summarized constant forces.

 

But what's the way for

 

q(x)= (q.e - q.s)/(x.e - x.s)*(x - x.s) +q.s

(with .e= end; .a=start)

 

or others like

q(x) = a * sin(b*x + c) or

q(x) = a* x² + b*x +  c

 

If i define a function to distribute that force per length I can't take either the element length into account or the type of Grid point (corner node or mid-side node)

 

Can someone help me? - Every suggestion is welcome. Best wishes, Michael

| Production: NX10; Development: VB, TCL/TK, FORTRAN; Testing: NX11 | engelke engineering art GmbH, Germany
| Kudos for good posts! And if my post answers your question, please mark it as an "Accepted Solution".

To the Rescue Great Thinker Well Liked Front Line