Error - Bisection may be activated 1

[shan13]

Hi
I am trying to simulate a moving load for a bridge model. What I did is:
I am running a do-loop to move my axle loads over the nodes and in each step in the do loop i remove the load from the previous step ; solve the structure for the new load position and trying to get the results.

I am doing a linear static analysis using a SPARSE solver as I have MPC184 element in my model.

But only after one iteration of the do-loop the program issues an error msg which states:
"Bisection may be activated if it is a nonlinear analysis."

I am pretty much new to ANSYS and do not know how to tackle this problem.

Can anyone please help me !!

by the way I'm using ANSYS 8

Thank you

 

[pja]

do a modal analysis to make sure you are properly constraining your model. If you are then I've also seen an error of this type occur when you run out of disk space and for some reason(probably somethng to do with the element matrices not being properly written) this error is tripped. However I'm willing to bet you haven't properly constrained your model.

Peter

 

[shan13]

Thanks for the reply Peter. But i already got rid of the problem. But I'm not sure what was exactly the error; could be because of disk space as u mentioned.
The model ran perfectly for a static load. In the moving load analysis I was using 5 substeps in each load step and I had about 150 of such load steps. Later I reduced it to 3 substeps and went through alright.
However thanks again for your reply

shan