著者
松村 竹実 浦 環
出版者
公益社団法人日本船舶海洋工学会
雑誌
日本造船学会論文集 (ISSN:05148499)
巻号頁・発行日
no.183, pp.91-100, 1998-06
被引用文献数
4 1

This paper proposes an artificial neural network system for regressive estimation of wave making resistance, which is significantly important in preliminary design of high-speed ship. The neural network can explicitly realize nonlinear mapping between hull form and wave making resistance. The system is composed of two kinds of neural networks ; Estimating Net and Descriptive Net. The Estimating Net learns the relation between hull form parameters and wave making resistance coefficients from a number of model-resistance test data. Consequently, when Froude Number, principal particular rations, and area curve parameters of a hull form are given, the Estimating Net of the learned data points in the hull form parameters space. It provides the information about the density of the learned data at the input point in the above parameters' space. In this paper, the test data of 62 models : Series 60, are used for the construction of the system. The leaning is successful and the results of playback calculation show good agreement with the original test data. Some applicable cases for non-learned hull forms are also explained. It is shown that the accuracy of the estimation is in accordance with the output of the Descriptive Net. When other model test data are available, it is easy to modify the constructed system, taking advantage of leaning ability of neural networks.
著者
胡 長洪 福地 信義 中島 徹
出版者
公益社団法人日本船舶海洋工学会
雑誌
日本造船学会論文集 (ISSN:05148499)
巻号頁・発行日
no.189, pp.127-135, 2001-06

In many compartment natural-convection problems associate with functional design of beat transfer for ships and ocean structures, large temperature difference occurs between the surrounding walls. Examples of such heat transfer problems include a cabin of a passenger ship when the neighboring cabin is on fire, and reefer holds of a refrigerating cargo ship. In these situations, heat radiation exchange among the wall surfaces cannot be neglected if the wall emissivities are not very small. In this paper, a numerical study is reported on combined turbulent convection, heat radiation and conduction in a rectangular enclosure with all six surrounding walls having finite emissivity and conductance. The turbulent convection is computed by a large eddy simulation (LES) method. The emphasis of the study is on the effects of wall radiation exchange on turbulent natural convection in a rectangular enclosure. For comparison with the computation, a laboratory experiment is also carried out on a rectangular enclosure with one sidewall heated by electric heaters. The effect of wall radiation on the natural convection is investigated by changing the wall emissivities. Excellent agreement of temperature between numerical predictions and the experimental measurements is obtained.
著者
甲斐 敬二
出版者
公益社団法人日本船舶海洋工学会
雑誌
関西造船協会誌 (ISSN:03899101)
巻号頁・発行日
no.90, pp.1-12, 1958-07-30

The "Argentina Maru" is the second ship built in Japan after the last World War which is originally designed as an emigrant ship. Her length and depth are same as the first ship "Brasil Maru", but many improvements have been made on various items. This paper takes up the most outstanding points out of them, such as, to pay more attention to stability, to adopt the sprinkler system for fire protection, and to adopt constant running system for water supply, etc.
著者
菊地 陽一
出版者
公益社団法人日本船舶海洋工学会
雑誌
造船協会誌 (ISSN:03861597)
巻号頁・発行日
no.398, pp.489-493, 1962-11-25
著者
片岡 克己 安東 潤 中武 一明
出版者
公益社団法人日本船舶海洋工学会
雑誌
西部造船会会報 (ISSN:0389911X)
巻号頁・発行日
no.96, pp.1-8, 1998-09-04

The hydrofoil catamaran model which is built up with the twin Wigley hulls and the tandem fore and aft set of hydrofoils is used for the numerical calculation and the experiments of this model was performed at Kyushu University. In this paper, combining with a Rankine source method, the SQCM (a simple panel method) is applied to the unsymmetrical flow problem around catamarans. And the running attitude of the model is not fixed in both the calculation and the experiments. Comparing with the experiment we show the interaction between hulls and the hydrofoils for the lift and the wave-making resistance in the high speed range.
著者
T.I.
出版者
公益社団法人日本船舶海洋工学会
雑誌
造船協会雑纂 (ISSN:03861597)
巻号頁・発行日
no.144, pp.122-145, 1934-03
著者
Y.T.
出版者
公益社団法人日本船舶海洋工学会
雑誌
造船協会雑纂 (ISSN:03861597)
巻号頁・発行日
no.113, pp.36-40, 1931-08