Tyre is modeled with tread pattern (hexa, penta, pyra and tetra elements used) and after running static analysis I performed SST and than import it in explicit. In this latter I can see soon that something is wrong just checking kinetic energy in .sta file during analysis.

I can see big oscillation of kinetic energy that should not be showed since explicit analysis start from SST conditions and I expect to get constant kinetic energy.

Strange thing is that if I run explicit analysis starting form static one and so accelerate tyre up to target velocity, once this target is acheived and keep constant I have no oscillation anymore.

Someone have some experience to suggest me how solve problem?

Thanks a lot

Abaqus ​​​​​​​