Explicit dynamic analysis of a bearing
Explicit dynamic analysis of a bearing
(OP)
Hi everybody,
i've a problem with an explicit analysis, dealing with a 2D cylindrical roller bearing working as track roller.
The model is "simple": the inner ring is fixed in its own position, and the rigid surface is pushed against the outer ring.
My problem is that i've set the force applyed to the reference point of the rigid surface to vary linearly along time, but stress dristibution looks like if it follow a sort of sin or cos.
I've done several standard analysis, but it's my first explicit one, so i really can't understand.
Here's a link to the video:
http://vimeo.com/31391947
Thx
Fabi0
i've a problem with an explicit analysis, dealing with a 2D cylindrical roller bearing working as track roller.
The model is "simple": the inner ring is fixed in its own position, and the rigid surface is pushed against the outer ring.
My problem is that i've set the force applyed to the reference point of the rigid surface to vary linearly along time, but stress dristibution looks like if it follow a sort of sin or cos.
I've done several standard analysis, but it's my first explicit one, so i really can't understand.
Here's a link to the video:
http://vimeo.com/31391947
Thx
Fabi0





RE: Explicit dynamic analysis of a bearing
Rob Stupplebeen
https://sites.google.com/site/robertkstupplebeen/
RE: Explicit dynamic analysis of a bearing
I've three steps, the radial load is applyed on the rigid surface in the first step, in the second i changed load modulus and in the third i've tryed a tabular amplitude like you can see here:
=============
=** LOADS
=**
=** Name: Laminazione Type: Concentrated force
=*Cload, amplitude=Tabular2
=_PickedSet256, 2, -8315.
=*Amplitude, name=Tabular2
= 0., 1., 1., 1.
=
=============
But even if it's a different aplitude, it gave the same problems as you can see in the video.
RE: Explicit dynamic analysis of a bearing
that way it ramps from 0 to 1 across the entire step
Rob Stupplebeen
https://sites.google.com/site/robertkstupplebeen/
RE: Explicit dynamic analysis of a bearing
RE: Explicit dynamic analysis of a bearing
A more detailed picture, description or CAE file really does help a lot in speeding up help on forums.
I hope this helps
Rob Stupplebeen
https://sites.google.com/site/robertkstupplebeen/
RE: Explicit dynamic analysis of a bearing
RE: Explicit dynamic analysis of a bearing
In the first step the load is set to instantaneous. I believe that is your problem. Ramp over the first step instead.
I hope this helps.
Rob Stupplebeen
https://sites.google.com/site/robertkstupplebeen/
RE: Explicit dynamic analysis of a bearing
Yes i've got a lot of elements, i'll try to reduce it, even if it's not a main problem (lot of computational power here...i like to "play" with pc network ;) ).
Instead, what do you mean with "the slower you load it the longer it takes"? Should i use 0.5 second for the first two step i.e.?
I've just "ramped" all the loads, hope it helps and i'll let you know!
Thx again and congratulation for your curriculum vitae!!
Fabi0
RE: Explicit dynamic analysis of a bearing