I wonder if I could switch a mesh technique from 'sweep' to 'structured'. Please see a picture below.

I make my model partitioned into several pieces to apply the structured mesh, but it can't do after the two upper edges are rounded. Does anyone give me a tip to resolve this?

I tried to mesh it,

but the mesh generation by 'sweep technique' creates bad meshes shown in the upper red box.

Is there any way to easily fix it in the Abaqus CAE?  

I want to use the hex mesh rather than other type like the tetra mesh. 

** without the round, mesh is good. 

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