Same script, different results
Same script, different results
(OP)
Good evening fellow colleagues,
I am using a python script to simulate a buckling problem using ABAQUS static/Riks. The problem is that I am getting different results for every time i run the SAME script. Sometimes I get the result I expect and sometimes I get rubbish. I have already looked into the Riks / Arc-Length formulation and I can`t find a random factor that could be causing this variability. I had the same difficulty using ANSYS APDL and I thought it was a bug, then I turned to ABAQUS. Do you have a clue on what is going on?
Thank you
I am using a python script to simulate a buckling problem using ABAQUS static/Riks. The problem is that I am getting different results for every time i run the SAME script. Sometimes I get the result I expect and sometimes I get rubbish. I have already looked into the Riks / Arc-Length formulation and I can`t find a random factor that could be causing this variability. I had the same difficulty using ANSYS APDL and I thought it was a bug, then I turned to ABAQUS. Do you have a clue on what is going on?
Thank you





RE: Same script, different results
Let me know if this helped. Good Luck.
RE: Same script, different results
RE: Same script, different results
RE: Same script, different results
RE: Same script, different results
RE: Same script, different results
Choose a Type option:
Choose Automatic to allow Abaqus/Standard to choose the size of the arc length increments based on computational efficiency.
Choose Fixed to specify direct user control of the incrementation. Abaqus/Standard uses an arc length increment that you specify as the constant increment size throughout the step. This method is not recommended for a Riks analysis since it prevents Abaqus/Standard from reducing the arc length when a severe nonlinearity is encountered.
Abaqus will "choose" the increment value...I bet there is some for of randomness in this process.
RE: Same script, different results
RE: Same script, different results
Good evening to you