SEA TESTS ON A SWING-MOORED AIRCRAFT CARRIER Y-R009-03-001 Type C Final Report

摘要

Sea tests involving motions and forces were conducted on the CVU-91, a deactivated Casablanca-class aircraft carrier. The ship, which has a displacement of about 9600 long tons, was swing-moored by a 2-1/2-inch die-lock chain in about 372 feet of water in the Pacific off Southern Califormia.Water-level variations, ship rotations and accelerations, mooring force, and wind velocity and direction were measured in sea states of 5 and 6.Two records, of 34 minutes each, were analyzed, using time-series techniques to relate the motions and forces to the water-level variations. Apparent amplitude response operators were obtained for all the ship motions and the mooring force.The averages of the highest one-third of the wave-induced amplitudes in sea state 6 were 0. 85 feet in surge, 3.20 feet in sway, and 7.07 feet in heave;4.60 degrees of roll, 2.63 degrees of pitch, and 0.31 degrees of yaw;and 17.5 kips in the mooring chain. Some of the highest-recorded wave-induced amplitudes were 3.4 degrees of pitch, 12.0 degrees or roll, and 84.6 kips in the mooring chain;this latter force, added to the initial chain ( nsion of 38.3 kips, resulted in a total of 122.9 kips. The most dominant motion, of 15-rninute period and 45-degree amplitude was fishtailing.