A part of sketching is sometimes jut pulling random bits and pieces together. I forget where either of these were inspired from, I think some otherwise unremarkable comic book or website. Both of the images are pretty standard concepts, the first one a somewhat futuristic sensor tower. While the big spherical thing is more common for something like a classic radome, it would also offer protection to a more sensitive radio transceivers.
The second is a smaller secondary assembly bay, something to be seen as part of a larger complex. Built to provide maintenance or construction support, it’s not really envisaged as being a major construction bay. Perhaps part of a machine shop that supports (dis)assembly in addition to repair work.