Learning Forum

[Tadeáš Salcman]

Hey Guys!

I found myself in kind of difficult situation. The thing is that I am learning Ansys and it has been no smooth ride so far. After I thought I fixed all of the issues I tried to solve the model and it just gets to around 30 % and then it keeps on repeating these steps:

I honestly don´t know where is the mistake. Could you guys help?

Here are some snapshots of the model I´m working on. In a nutshell it is a rig that should hold seats inside a tram and I have to check if it is safe enough. My analysis settings are these:

 

[dlooman]

Check the Solution Information to see what is happening.  In addition to Solver Output, Force Convergence is usually informative.  To see if the model is completely connected perform a modal analysis.  If a part isn't fully connected it will produce a zero frequency mode that will indicate the unconstrained motion.  

[Tadeáš Salcman]

Hello Dave,

I have tried to update the normal stiffness from 1,0 to 0,2 (should help according to some tutorials) but I still did not reach Convergence. Here is how the Force Convergence graph looks like:

I also ran the Modal analysis and I have reached these results:

Does that mean I have unconstrained motion? How can I prevent that? Do you have some tips? Thanks!