半排水量型高速艇の波浪縦曲げモーメントに関する模型実験と推定計算

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To the design of large-size high-speed craft, consideration on longitudinal strength of hull becomes of fundamental importance as her service area is extended in rough sea far off the coast. Therefore, it is necessary to establish the prediction method of wave bending moment acting on large-size high-speed craft for the base of hull strength design. Most important characteristics of wave bending moment of high-speed craft is the non-linearity that sagging moment is far larger than hogging one, which must come from large amplitude motion and high speed running. Computer simulation program was developed, therefore, based on non-linear strip theory to predict the bending moment, and comparison was made with the results of experiment obtained by use of a backbone model of semi-displacement type high-speed craft. Basic formulation of equation of motion was depended on the Salvesen-Tuck-Faltinsen's strip theory, but hydrodynamic coefficients were treated as a function cf time at the instantaneous draft of each section, and further, non-linear impact force called momentum slamming was introduced. Two-dimensional hydrodynamic force acting on section was calculated by the singulality distribution method. Computer simulation showed good agreement with model experiment, in comparison of time histories, longitudinal distribution, effect of wave height, effect of wave length and effect of advance speed on the wave bending moment.
社団法人日本船舶海洋工学会の論文
1986-03-01

半排水量型高速艇の波浪縦曲げモーメントに関する模型実験と推定計算

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