I need to replicate a soft plastic roof that gets pulled over tunels as well as wrope that pulls the palstic tight.  I have attached an image of the actual tunels and my model... I cant wrap my head around how to replicate this in solidworks? 

PS the wrope gets tied off to the hooks on the legs (just underneath the U that the roof hoops slide onto).

PPS obviously the ripples in the plastic dont have to be replicated.  Just the appreance of having the plastic roof tied down with the rope.

Thanks!