Why new battleships suffered vibration and other teething problems

Why did North Carolina and even later American battleships have vibration problems?

A long battleship-building hiatus had eroded practical experience, and wartime production left little time to pause, learn and redesign between classes.

The interwar construction gap matters as much as any single technical mistake. After roughly two decades without building battleships, yards and design organisations had lost practical knowledge that manuals do not fully preserve. North Carolina and later wartime classes then had to work through teething problems while construction schedules were already under pressure. Machinery vibration became part of the wider industrial problem of rebuilding a dormant high-skill production system.