SolidWorks surface-based error

[MatthewTM]

Hi, all. Recently i have started to do simulations in Solidworks 2011. At work i must simulate pressure/force momentum.. on one of our products. I am new at this, thus i came here for help.

Am i doing right? what is the procedure for this type of simulation. (look under project tree on video)

Problem is described in my video ( i am not promoting anything/anyone or so, by providing this link):

http://www.youtube.com/watch?v=9dQkJ-wGPAc&feature=channel_video_title

P.S.: i may need to get some more help in the recent future but for now, this is my main obstacle. I am stuck.

please help its a bit urgent and thank you

 

[inventing]

I'm not an expert at simulation but my best guess would be that your fixed geometry is not creating a stable analysis. That warning sounds to me like there is an unconstrained force and the assembly is either rotating or sliding.

 

[Eltron]

Try asking over in the Simulation Forum.


Dan

http://www.eltronresearch.com

Dan's Blog

 

[MatthewTM]

hey, thank you for advices. I have found that, when i manualy set: under "connections" (contact set) with no penetration it give me that error. Probably because i have not defined it properly. What i did is, deleted all that manual connections (on my video at 3 seconds left on the "tree structure") and used only: component contact / global contact (with no penetration) it comes by default. My PC took about 45 min to calculate it, but hey, it worked!

http://www.youtube.com/watch?v=krMPUkaTzkA&feature=channel_video_title

All i need to do is now, define for each contact friction. (hard when its used only global contact)

will ask in simulation section. Did not even know about that section

anyway ill ask here for one more advice.

in this video the image will be clearer of what i am about to ask:

http://www.youtube.com/watch?v=3hrZv5DixKU&feature=channel_video_title

Here you can see the springs. One is bigger, and there are two simetrical smaller springs. All are under stress and under elastic deformation. forces, pressure...

I dont know how to simulate them. Must i leave them in this position and define preapplyed Internal Tension, or leave them in original position and somehow put them under pressure/force. I dont know how to express it, sorry. Hope its understandable.

What i mean, how would you began to study/simulate those springs? big one got only horizontal force applyed, the small ones got momentum force applyed.

THX, M.