Wave Impact Analysis and Results Obtained from a Segmented Model of the High-Speed Sealift Trimaran Model 5594

摘要

Hydrodynamic loads testing was completed on a segmented, high-speed sealift (HSS) trimaran model, number 5594, having a scaled ratio 1:45. The model was comprised of six shell sections connected using a calibrated backspline with instrumentation to measure primary and secondary hull girder loading. This test was an evaluation by the Navy of a notional structural design for a lightweight high-speed hull form in support of the High Speed Sealift Program. Irregular wave experiments have been completed to evaluate primary and secondary structural loads and seakeeping performance. This report documents the secondary structural loads data analysis for the irregular wave test series. Model testing was performed at the NSWC Harold Saunders Maneuvering and Seakeeping (MASK) facility in June 2002 and ended with irregular wave testing in July 2002 on Carriage 2 of the David Taylor Model Basin. Maximum wave impact pressures from eight hull girder shell locations ranged from 13 psi to 64 psi. The foredeck green sea loading events ranged from 42 to 195 psi in Sea State 5 at 45 knots. The utility of these results will be realized through comparisons and validations of analytically based secondary load computations.