dynamic nonlinear simulation

[nicolapastena]

boys are doing a simulation, a rubber membrane inserted in an aluminum cylinder with pressure cycle that varies over time, the analysis I did is not linear dynamic, and I gave tt the constraints including non-conpenetrations between membrane and cylinder the problem is that the analysis seems infinite (even if hours pass), the progress indicator always indicates an abnormal 1.$% I attach the photo. if someone has advice thanks.

 

[nicolapastena]

boys I made 10 hours simulation and it's still like this....there's number making hours 476

 

[nicolapastena]

I found this tutorial on the internet but I can't figure out where I'm wrong to do the same things he does.http://www.youtube.com/watch?v=uxuhtqbuv0o

 

[cacciatorino]

How many knots? initially try with a much bigger mesh, and check if you still have the problem. then, by the hand, you step into the mesh.

Unfortunately, non-linear analysis requires great computing power, so it's better to try to "help" the software by uploading it as little as possible.

For example, since your piece is asymmetrical, you could only shape half or a quarter, imposing the correct bond conditions.

 

[Swarzy]

Hello nicola,

I don't understand why the problem you need to analyze is that you're performing a dynamic analysis.

not having any body that has kinetic or potential energy, but you have to evaluate the behavior of the transmission of pressures between bodies (or wrong?), you have to perform a non-binding static analysis.

then:

set the study with a static nonlinear analysis and since you use the 2011 version begins with a 2d simplification of the problem :wink:http://help.solidworks.com/2011/italian/solidworks/cworks/allcontent/solidworks/noncore/swsimulation/2d_simplification/c_workflow.htm?id=659afd5681964a989258cb1376ff08f9#pg0ciao, brewers

 

[nicolapastena]

boys maybe I solved the resolution time I gave in the analysis property was too low now I increased it to 1 second and it seems to go ahead with the percentage now no more 1.$%.
However the analysis is dynamic because the pressure varies with time (in a short time and much) and static analysis, it is assumed that any force or pressure is gradually etched.
I expect the results of the analysis.. .

 

[ruggine]

Exactly.

go to execute and set properties, there you will find the running time of each calculation step.

you should use fixed time, (you impose it as high as possible) and start to lower it until you see that calculation times are acceptable.