著者

安川 宏紀 中村 暢昭

出版者

公益社団法人 日本船舶海洋工学会

雑誌

日本船舶海洋工学会論文集 = Journal of the Japan Society of Naval Architects and Ocean Engineers (ISSN:18803717)

巻号頁・発行日

no.6, pp.313-321, 2007-12-01

参考文献数

14

被引用文献数

3 1

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An analysis method is presented to know whether a towed ship is stable or not in the course stability in wind. The method is based on the linearized motion equations newly derived in this paper for the towed ship. The special feature is to take the effect of hull steady condition of the towed ship in wind into account. By means of the analysis method, the wind effects on the course stability of a towed barge were investigated. The course stability recovers in the range from beam to quartering wind even if the towed barge is unstable in no wind case. Namely, the barge is stably towed with keeping the certain heading/drift angle in the beam/quartering wind. On the contrary, the course stability reduces in head and following winds with higher speed even if the towed barge is stable. We found that the course stability of the towed ship is much affected by the hull steady condition in wind. The analysis results agreed well with the simulation results by a nonlinear time domain method. The present analysis method is useful for better understanding of the course stability of the towed ship in wind.

著者

鈴木 勝雄 日比 茂幸

出版者

The Japan Society of Naval Architects and Ocean Engineers

雑誌

日本船舶海洋工学会論文集 = Journal of the Japan Society of Naval Architects and Ocean Engineers (ISSN:18803717)

巻号頁・発行日

no.17, pp.1-8, 2013-06-01

参考文献数

8

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The perturbed complex potentials representing flows around a vertical plate semi-submerged in a uniform stream are derived in analytical forms by the reduction method. They are composed from the regular solution and the weak singular eigen solutions. The linear combinations of them represent some flows such as regular flow, zero-vertical flux flow, flow satisfying Kutta condition and wave-free flow. The wave resistances of the flows are also obtaied in analytical forms. The analytical solution obtained by Bessho-Mizuno(1962) has a possibility that it dose not satisfy the boundary condition on the plate.

著者

稗方 和夫 大和 裕幸 安藤 英幸 榎本 昌一 中澤 崇 ロジャナカモンサン ピルン 尾石 航

出版者

公益社団法人 日本船舶海洋工学会

雑誌

日本船舶海洋工学会論文集 = Journal of the Japan Society of Naval Architects and Ocean Engineers (ISSN:18803717)

巻号頁・発行日

no.4, pp.81-88, 2006-12-01

参考文献数

13

被引用文献数

3

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It's getting more important to transfer knowledge from elder experts to young engineers especially in shipbuilding industry in Japan. We proposed a method to support knowledge transfer and developed a system based on workflow concept. From the case study in our prior report, the method and the system were proved to be useful for knowledge acquisition in design department. At the same moment, several problems are found during the case study. To resolve these problems, a formal process description method using semantic web technology is introduced and developed. The newly proposed method for formal process description and the developed system are evaluated in experimental use for CAD operation.

著者

市来崎 哲雄 山本 郁夫

出版者

公益社団法人日本船舶海洋工学会

雑誌

日本船舶海洋工学会論文集 = Journal of the Japan Society of Naval Architects and Ocean Engineers (ISSN:18803717)

巻号頁・発行日

no.5, pp.9-13, 2007-06-01

被引用文献数

1

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The authors developed a robotic fish that swim with fins that apply flexible oscillating fin technology. The Carp Robot, whose artificial appearance was created through three-dimensional CAD processing of numerical data for the outer shape of living carp sampled through three-dimensional laser digitizing. Although this robotic fish was developed for the amusement field, it is thought to contain key technologies for the development of work robots in the future. For example, "mechatronics" technology involving center-of-gravity shifts, FM radio wave technology for navigation, CCD image data transfer technology for observation, and other technologies were applied to the robotic fish. In this report this robotic fish will be used as examples to explain these development achievements.