Validation of FEM predictions of
Vibration Levels to support CVN Design
Mr. Kevin Arden, Northrop
Grumman
Abstract:
Excessive vibration in surface ships is a design concern that affects
equipment and sailors. CVN78 is using lighter more structurally efficient
deck design. The Nimitz class design has proven
through experience that the vibration levels are adequate and establishes a
baseline for CVN78 to meet.
During several ship trials of CVN76 vibration measurements were performed on
the engine rooms, machinery flats, decks, platforms, and hull girder.
These measurements were done to support CVN78 design and finite element model
predictions of vibration levels.
This presentation reviews how these measurements were used to validated FEM predictions of vibration levels on deck
structure. These validated structural response predictions were used to
evaluate CVN designs.
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