Response Predictions of Helicopter Landing Platform for the USS BELKNAP (DLG-26) and USS GARCIA (DE-1040)-Class Destroyers
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD SHIP PERFORMANCE DEPT
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Motion-response predictions of the helicopter landing platform for the USS BELKNAP DLG-26 and USS GARCIA DE-1040-Class destroyers are presented. Predictions have been obtained by a computer-implemented procedure, which calculates response statistics at an arbitrary point on a ship in long- crested, irregular seas. The procedure is based on ship-motion theories in the state of the art. Results are presented for several ship speeds, states of sea, and ship headings--ranging from head to following waves. Existing envelopes of helicopter operations are discussed, and suggestions have been made, based upon the results of this study, for the listed new operational envelopes in higher states of seas responses other than roll, e.g., vertical response at the landing platform, must be considered quartering sea landings may be safer than bow sea landings and to increase safety of operations, BELKNAP should be stabilized in roll.
- Marine Engineering