Accession Number : AD0830341

Title :   EVALUATION OF EFFECT OF BOW FORM ON MODEL WAVE-INDUCED AND WHIPPING RESPONSES.

Descriptive Note : Final rept.,

Corporate Author : DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD

Personal Author(s) : Andrews, John N. ; Dinsenbacher, Alfred L.

Report Date : FEB 1968

Pagination or Media Count : 24

Abstract : Random wave tests were conducted with a model of an aircraft carrier and with the forward bow sections of the carrier model modified in the form of a V. The models were tested in random waves representing various sea states at speeds of 0 and 13.8 knots (full-scale). Tests were conducted in head seas only. Response amplitude operators (RAOs) for wave-induced midship bending moment and pitch angle were derived from spectral analysis. Comparison of the RAOs showed little difference due to change in bow form. The comparison of whipping response for both models showed little difference at zero speed; however, at 13.8 knots, the whipping response for the carrier model increased greatly from the zero speed test while the V-form model showed little difference. (Author)

Descriptors :   (*AIRCRAFT CARRIERS, OCEAN WAVES), (*SHIP HULLS, HYDRODYNAMIC CONFIGURATIONS), SHIP MODELS, RESPONSE, IMPACT SHOCK, MODEL TESTS, BENDING, MOMENTS, PITCH(MOTION), BEAMS(STRUCTURAL).

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE