AndreaIng
Guest
hello to all, I hope to receive a useful help and quickly because I am in short strands with my thesis of the three-year mechanical engineering: study of the finished elements of the frame of a bicycle.
the situation is this:
1- I designed the frame in solidworks, I used only surfaces because the study I want to do later is with shell elements
2- I saved in iges format that is the only format that does not give me too many problems (because it gives me ...) of import.
There are some options to check to save in iges format... if you know the configuration of these options allows us the "perfect lift" in iges format using solidworks, tell me perfavore, I would be grateful because I have made countless attempts and cmq errors always gives me (it invents the superfizi that I have never designed...buh )
3- I imported the iges file in ansys 11 (classical interface, workbench is so beautiful and useful for "massive frames" but don't tell him to simulate with surfaces because the results nn get them right and the calculation times are very long )
4- I glued with the preprocessor>modeling>operate>booleans>glue command most "complanar" surfaces and for intersecting ones I used the boolean overlap operation that goes + or not from replacement action to the first in the case of intersecting surfaces. to do all this I have modified many times to attempts the btol/ptol command that allows me to tell how much the hell is the tolerance "+ or less exact" to merge the surfaces.
5- After numerous attempts and very difficult arrival to connect everything except the oblique tube to the steering tube (you can see in the following photo and you realize ) because the glue command does not work well, the overlap command instead gives me various types of error:
- warns me to bring btol/ptol tolerance to a value that is a fraction of the minimum distance of keypoints
- send me to the glue command if I exaggerate too much with tolerances too stingy or too wide
- sometimes it enters an infinite cycle of iterations that should lead to the bonding but, I guarantee it, after half an hour of iterations nn pastes just nothing
6- I entrust myself to this point to the mythical contact pair to create the binding link or without separation. This command, however, despite the ease of use and the mythicality of its existence, gives me a nice non-linear analysis: eek:...which doubles the calculation time in my case (some people have lost the lumen of reason with non-linear analysis and have become avid smokers for stress... I'll keep it.
result: locally the solution sucks and by gross I mean that it has a peak of abnormal tension that I don't like, sharpen the contact surfaces (but I don't stand creating an absorber of cabbage bumps!!!! ) and rest assured that I also deampled the deformed to values 5 times the real one (by 20 default ).
if someone had been passionate about the case as strange and you are competent people with ansys 11.... Please help me find a solution/alternative to create a union or tell me where I might have wrong and why the glue/overlap command only works and feels magnanimous....in the end I managed to paste everything perbene and makes me stop at the end to paste two stinky surfaces. . .
as promised I posted the photo because otherwise you do not understand what I have explained in words.
I thank you in advance whatever your answer will be.
hello to all and thanks
the situation is this:
1- I designed the frame in solidworks, I used only surfaces because the study I want to do later is with shell elements
2- I saved in iges format that is the only format that does not give me too many problems (because it gives me ...) of import.
There are some options to check to save in iges format... if you know the configuration of these options allows us the "perfect lift" in iges format using solidworks, tell me perfavore, I would be grateful because I have made countless attempts and cmq errors always gives me (it invents the superfizi that I have never designed...buh )
3- I imported the iges file in ansys 11 (classical interface, workbench is so beautiful and useful for "massive frames" but don't tell him to simulate with surfaces because the results nn get them right and the calculation times are very long )
4- I glued with the preprocessor>modeling>operate>booleans>glue command most "complanar" surfaces and for intersecting ones I used the boolean overlap operation that goes + or not from replacement action to the first in the case of intersecting surfaces. to do all this I have modified many times to attempts the btol/ptol command that allows me to tell how much the hell is the tolerance "+ or less exact" to merge the surfaces.
5- After numerous attempts and very difficult arrival to connect everything except the oblique tube to the steering tube (you can see in the following photo and you realize ) because the glue command does not work well, the overlap command instead gives me various types of error:
- warns me to bring btol/ptol tolerance to a value that is a fraction of the minimum distance of keypoints
- send me to the glue command if I exaggerate too much with tolerances too stingy or too wide
- sometimes it enters an infinite cycle of iterations that should lead to the bonding but, I guarantee it, after half an hour of iterations nn pastes just nothing
6- I entrust myself to this point to the mythical contact pair to create the binding link or without separation. This command, however, despite the ease of use and the mythicality of its existence, gives me a nice non-linear analysis: eek:...which doubles the calculation time in my case (some people have lost the lumen of reason with non-linear analysis and have become avid smokers for stress... I'll keep it.
result: locally the solution sucks and by gross I mean that it has a peak of abnormal tension that I don't like, sharpen the contact surfaces (but I don't stand creating an absorber of cabbage bumps!!!! ) and rest assured that I also deampled the deformed to values 5 times the real one (by 20 default ).
if someone had been passionate about the case as strange and you are competent people with ansys 11.... Please help me find a solution/alternative to create a union or tell me where I might have wrong and why the glue/overlap command only works and feels magnanimous....in the end I managed to paste everything perbene and makes me stop at the end to paste two stinky surfaces. . .
as promised I posted the photo because otherwise you do not understand what I have explained in words.
I thank you in advance whatever your answer will be.
hello to all and thanks
