Hi
I tried to apply hydrodynamic water load at pipe as nodal load like below:
*LOAD_NODE_POINT
$# nid dof lcid sf
1 1 1 1.00
2 1 1 2.00
3 1 1 3.00
.............................
9570 1 1 1.00
I have a load curve (lcid) as below:
*DEFINE_CURVE_TITLE
$# lcid sidr
1 0
$# a1 o1
0.000 0.000000
1.000000 1.000000
The sf (scale factor) is basically my load that are applied as pipe nodes (please see image). I am doing implicit analysis and found that if I exclude these load steps (*LOAD_NODE_POINT) and include only hydrostatic load, my model ran completely. However, if I include *LOAD_NODE_POINT steps, then my model is not converging and aborted after just 0.1 sec (total time = 1 sec). Could anyone suggest me what to do. I am stuck at it for a while.
Hi @mmia1,
It seems like your model is getting over constrained. Also, you are trying to expand those nodes outward radially with a force correct? I'm not sure you would get that result even if the model ran because the force would be applied in the global x direction.
I think you want to use *Load_segment_set. You can read more about how it's implemented and the directionality in the manual.
https://ftp.lstc.com/anonymous/outgoing/web/ls-dyna_manuals/DRAFT/DRAFT_Vol_I.pdf
Page 3275.