Hello Guys, How are you ?
I just graduated, so i started performing some analysis using FEMAP v10.3 besides that i was using SolidWorks Simulation to run my simulations.
Usually i model the part using solidworks and then import it to FEMAP. I am having problems to run this study, always getting the same error : " RUN TERMINATED DUE TO EXCESSIVE PIVOT RATIOS IN MATRIX KLL" i was aware that this error is due to the parts of the model are not connected or your model is not correctly constrained. To fix this you have to:
1- Change your fixtures.
2- Merge nodes.
3- Connect faces.
I tried all of this solutions but i did not get my problem solved. Could someone help me ?
Solved! Go to Solution.
Run Modal analysis. If model is poor constrained then you get modes with near zero values (like 1e-6...1e-3) - they called "rigid body modes". Unconstrained parts of structure move without deformation at these modes. Now you can see what parts need to be fixed.
Where are the curved tubes in your model? Can you explain where/why you are using the curved tube properties versus the tube property.
It will run if you change the property to a beam using the same cross section. To do this use Modify > Element > Type, select all elements and create a new beam property with a circular tube cross section.