How to make this transition mesh in Abaqus

[jingansong]

Hi everyone,

I'm trying to create transition mesh like this in the picture, (please see the picture through the following link)

http://files.engineering.com/getfil...9f-97dc-ae98a2222a0c&file=Transition_mesh.PNG

I have used sweep mesh and transition mesh for the middle region by assigning mesh controls,

http://files.engineering.com/getfil...-1d209fd6c24c&file=Transition_mesh_abaqus.PNG

http://files.engineering.com/getfil...85165d5b&file=Transition_mesh_abaqus_fail.PNG

but I couldn't get what I want.
Can somebody give me some tips? Thank you!