I would suggest creating the assymmetric pattern in a CAD software like solidworks and then importing it to ABAQUS and adhere it to your cylinder using tie constriant.
This also depends if your parts are seperate in real world or are the same. If in real world the assymmetric part is an extension of the cylinder then I would suggest designing the cylinder with the assymmetric part in the CAD software and importing it to ABAQUS.