We have recently switch from XP to win7. Basically 32 to 64 bit. The simulation results in the 32bit vertion of inventor has always been second to none. But the new (new to us) 64 bit vertion has yeiled some false results. more worriingly the results indicate that the model is in fact good enough to do the job. I have attached a document outlining my findings.
I have contacted my software supplier and they reported it to autodesk. Autodesk has in turn said that the problem is noted but the case has been closed. I have no problem accepting a minor deviation, even 5% but the results can have an error of 0% to 80%.
If anyone knows a cure or has had this type of trouble, please let me know.
Solved! Go to Solution.
Thank you for posting your analysis. The results are very disturbing. We will have to exercise extreme caution when using the simulation module.
I have conducted more comparison simulations on inventor 2014 64 bit and inventor 2012 32 bit. here are some screenshots of my simulations.
Inventor 2012 von mis:
Inventor 2014 von mis:
The expected stress at this location is 37 Ksi. This stress value was calculated via the traditional method. This means that the new inventor is wrong by 36%!!! The simulations are identical. it is the same model, same material and the same forces and constrains. It is bizzare that I am the first to report this problem. if you are have a simmilar issure please post it on this thread. I will be adding some more examples later on.
Even small analysis are yeilding false results!!! This one is 3x3 square tubing with some plates on it.
and now Inventor 2014:
From 30.44 Ksi to 17.43 for the exact same analysis, almost half. anyone else has this problem!?
If there were any doubts this one will clear them up! This is the worst one to date.
The 2012 vertion gave us a max of 88.77ksi. The 2014 vertion gave us 0.12ksi...... with the EXACT same model. I simply ran the simulation in 2012 and then re-ran it in 2014. Thats an error of 99.8%. Please autosesk... make a patch for the analysis enviroment. The worst part is that Inventor used to school Solid Works in the analysis department.
It would be useful to have the actual part files that these results are taken from.