my simple static analysis keeps falling at the same hurdle

[strathman]

i am currently trying to do an FEA on a roll bar and have been getting some ridiculous results when trying to optimise it. I think i have traced the fault back to the original static analysis were it successfully completed it however provided a warning in the diagnostics page saying:

"Warning - local reaction data is currently unavailable if one or more constraints are specified in curvilinear or local Cartesian coordinates."

after this I investigated this further in the summary where it presented all of the measures of the analysis and stated the following message:

"warning - the measures marked with an asterisk were evaluated at (or close to) results singularities. the values of these measures may be inaccurate and you must use engineering judgement when interpreting them"

has anyone revived a similar message before and may even be able to shed some light on the matter and possible recommend what can be done to fix the issue?

Cheers,

Nick

 

[jvian]

Yes I see that message fairly frequently depending on the measures and areas of interest. Often they can be ignored. You must isolate the singularities or place measures away from stress singularities or you will never converge on a valid answer and your results will always be GIGO. I have never really done any optimization so I cannot help you there but I will say you should post this question in the Creo Simulate (mechanica) forum. It is more appropriate there than here.

PTC: Creo Simulate (Pro/E Mechanica) Forum

http://www.eng-tips.com/threadminder.cfm?pid=828

(not sure if the link is the general link to the forum)

Also without more details you may not get too much help since we have no idea what you are trying to perform. That being said there are some very intelligent people in these forums so if you post in the above thread you may get some great advice.

Hope that helps and good luck,

- J -

 

[brep]

Agreed with jvian... post over in the Creo Simulate forum and we'll help out.