Abaqus：Inputfile或Python脚本中的参数几何/装配？

Question

i want to do something as a parametric study in Abaqus, where the parameter i am changing is a part of the assembly/geometry. Imagine the following:

A cube is hanging on 8 ropes. Each two of the 8 ropes line up in one corner of a room. the other ends of the ropes merge with the room diagonal of the cube. It's something like a cable-driven parallel robot/rope robot.

Now, i want to calculate the forces in the ropes in different positions of the cube, while only 7 of the 8 ropes are actually used. That means i have 8 simulations for each position of my cube.

I wrote a matlab script to generate the nodes and wires of the cube in different positions and angle of rotations so i can copy them into an input file for Abaqus.

Since I'm new to Abaqus scripting etc, i wonder which is the best way to make this work.

would you guys generate 8 input files for one position of the cube and calculate them manually or is there a way to let abaqus somehow iterate different assemblys?

I guess i should wright a python script, but i don't know how to make the ropes the parameter that is changing.

Any help is appreciated! Thanks, Tobi

Answer 1

In case someon is interested, i was able to do it the following way:

I created a model in abaqus till the point, i could have started the job. Then i took the .jnl file (which is created automaticaly by abaqus) and saved it as a .py file. Then i modified this script by defining every single point as a variable and every wire for the parts as tuples, consisting out of the variables. Than i made for loops and for every 9 cases unique wire definitions, which i called during the loop. During the loop also the constraints were changed and the job were started. I also made a field output request for the endnodes of the ropes (representing motors) for there coordinates and reaction force (the same nodes are the bc pinned)

Then i saved the fieldoutput in a certain simple txt file which i was able to analyse via matlab.

Then i wrote a matlab script which created the points, attached them to the python script, copied it to a unique directory and even started the job.

This way, i was able to do geometric parametric studies in abaqus using matlab and python.

Code will be uploaded soon