Beam Elements, UEL, ABAQUS, Rotation

Hi everyone,

I'm working on UEL and studying wave propagation in beam. I have a special purpose beam element defined in UEL which has four nodes.  When the beam is horizontal and a vertical load is being applied, it's working perfectly:

*Node
      1,           0.,           0.,        0.
      2,         0,           0.25,        0.
      3,           0.,           0.,        0.
      4,         0.,           0.25,        0.

*USER ELEMENT,NODES=4,TYPE=U201,PROPERTIES=15,COORDINATES=3,VARIABLES=100, UNSYMM
1,2,6        
*ELEMENT,TYPE=U201,ELSET=Set-1
  1,   1,   2,   3,   4

*Cload, Amplitude=TB40KR
FR, 2, 1.

But, when the beam has a rotation (let's assume 45 degree wrt horizontal line), and the same load (vertical) is being applied, something is going wrong and I'm getting exactly the same answer with the horizontal one (they shouldn't be the same. It has been tested by using B32 elements from ABAQUS library).

*Node
      1,                           0.,                             0.,        0.
      2,         0.176776695,           0.176776695,        0.
      3,                           0.,                             0.,        0.
      4,         0.176776695,           0.176776695,        0.

*USER ELEMENT,NODES=4,TYPE=U201,PROPERTIES=15,COORDINATES=3,VARIABLES=100, UNSYMM
1,2,6        
*ELEMENT,TYPE=U201,ELSET=Set-1
  1,   1,   2,   3,   4

*Cload, Amplitude=TB40KR
FR, 2, 1.

I'm pretty much sure it will raise lots of questions in your mind about why I'm not using beam elements from ABAQUS library and etc. I should say that, I HAVE TO define and use my own elements. :(

It would be very kind of you to let me know what's wrong here.

Thanks in advance.

Best Regards,