Yes, I already gave the dimensions. I want to somehow lock the sketch to body. I have cylindrical body and this sketch creates a solid inside that body like the picture below,

I want to lock this beacuse I perform buckling analysis to this cylindrical body when it is predeformed (with a bent bow like shape) and I have to move this sketch everytime I move the cylindrical body to a bent shape. You can see that in the picture below,

I am condusting a parametric study for this and I parametrized the movement in x-direction. So, if I can let this sketch move along with the cyclindrical body then I can conduct a better parametric study.

If anyone could help me with this, I would be very grateful!!