mesh doesn't respond correctly to prescribed displacement

[frosti1]

I am applying prescribed displacement to series of nodes at a boundary, but when it runs, only those applied nodes move and other parts of mesh stay unchanged.
does anybody knows whats my problem?
regards

 

[PamCrash]

If its a dynamic analysis then the units of the density could be wrong (e.g. nonconsistent unit system)

 

[frosti1]

pamcrash,
thank you for response.
My model is cavity expansion in abaqus standard. I checked units, it is consistent.