Hi to all,

I try again to explain my problem since I have not had answers.

I made a tire model with tread pattern and, after 3d simulation and SST, imported the latter in abaqus explicit to simulate rolling of tire in free rolling condition (I need to have tire rolling and is not enough SST that why xpl).

This is not my first time I perform an explicit analysis with tread pattern but only with this model I have big oscillation in VR2 (rotational velocity around axes of tire).

I tried to remove tread pattern doing simply symmetric model generation revolve and I have no problem in explicit. 

So I tried to create tread pattern grooved (let me say fake tread pattern like the previous one that worked) but periodic using the same material and the rest of geometry of previous model. 

The result is that still big oscillation in VR2 and changing in kinetic energy occurs.

There is anyone experienced with this?

Thanks in advance

Available for more details

Dario