I have a photo of the area after a torpedo hit somewhere. Gotta search it. Way different than just a hole. A lot of metal gets bend inward.
Bulkheads will fail if close by the point of impact. Either by direct explosive force or by rupturing due to physical forces like bending and tearing.
If the drive shaft gets damaged badly you are in a world of pain. Imagine a giant propeller shaft in a confined space torn free of its bearings...
Vibrations will cause damage. I recall reading that the German cruiser Ad. Hipper had to stop for immediate repairs somewhere between Scandinavia and England due to a faulty shaft bearing.
Water seepage will occur, too. After some time electric cables etc. will draw water like wick. Again, Hipper had to cut a lot of cables to fire control after some compartment down below had taken water to prevent massive shorts.
Cheers!
Chris