Hello everyone, I am modelling on tubular structure in Abaqus, as shown in the figure. When I am running this model by using implicit analysis , it is taking so much time because very little time increases. So I tried to refine my mess, and it was noticed that one of the reasons for less time increase is the free edges in the model. I identified the free edges, but I am not able to delete them from the model . so please guide me on what should do and how to delete those free edges from the model. 

Thanks