著者
池平 怜史 木村 元
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 (ISSN:18803717)
巻号頁・発行日
no.9, pp.223-229, 2009-06
被引用文献数
1

This paper presents an automatic design algorithm for pipe arrangement based on equipment arrangement figure and pipe diagram. Firstly, a pipe arrangement design problem is proposed for a space in which pipes and objects co-exist considering branches of the pipes and valve arrangement. This problem includes large-scale numerical optimization and combinatorial optimization problems, as well as peculiar characters of pipe arrangement design. For these reasons, it is difficult to optimize the problem using usual optimization techniques such as Random Search. Therefore, secondarily, a genetic algorithm (GA) suitable for this problem is developed. Lastly, the proposed method for optimizing a pipe arrangement efficiently is demonstrated through computational experiments, and remarks are provided for applying this methodology to a practical pipe arrangement design.
著者
鈴木 和夫 伊岡森 信臣
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.185, pp.9-19, 1999-06
被引用文献数
12 13

In the original Rankine source method suggested by Dawson, free surface panels are arranged by means of the stream line tracing method based on the double model flow. In the present study, however, it is replaced by an elliptical type panel arrangement. In order to satisfy the radiation condition on the free surface, the upstream difference operators are introduced in computational domain corresponding to those panels. By employment of this new type free surface panels, more accurate results can be obtained for a practical hull form, because it becomes very easy to increase the density of panels in near field of the ship. According to this improved Rankin source method, a hull form improvement problem to minimize the wave making resistance is discussed, in which the optimization is carried out, under the prescribed design constraints by means of the nonlinear programming technique. In the optimization process, a weight function is introduced to represent an improved hull surface, which can generate a new smooth hull surface by multiplying it to the offset data of the initial hull surface. Design parameters expressing this weight function can be determined from the optimization process based on the nonlinear programming technique. In this paper, SQP (Sequential Quadratic Programming) is employed as the nonlinear programming. As an example of the hull form improvement, the HTC (Hamburg Test Case) container ship is selected as the initial hull form to be improved.
著者
奥田 克己 村崎 正道 宇野 九十九
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.270, pp.28-42, 1948-05-25

前囘迄の三囘に及ぶ論文に於て, 動荷重を考慮せる齒車の強度計算法に就て詳述したが, 今囘は設計者の便に資するため, 以上の記述を總括して計算の公式を設計の順序に従て排列した, 最後に本計算方法の数値計算例を示し, 三菱重工各場所に於て製作せる各種齒車に對して實施せる強度計算結果を表示し, 安全率を圖示して本論文の結びとした, この結果に依れば大體に於て本法に依て得られた強度の安全率に對し著しき矛盾は認められなかつた。
著者
古川 芳孝 貴島 勝郎 茨木 洋 池田 渉 松永 祐樹
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 (ISSN:18803717)
巻号頁・発行日
no.1, pp.151-158, 2005-06

Navigational safety is highly demanded in order to prevent marine accidents. However the reduction of personnel expenses is enforced recently to reduce total transportation cost and it means that the securement of crew who have an excellent skill becomes difficult. So the increase of sea disaster accident originated with the degradation of skill of sailors is concerned in the future and the introduction of an automatic navigation device is the one of the solution of such a problem. In this paper, the improved algorithm to avoid colliding with a stopping ship is proposed. The effect of parameters on evasion navigation is examined by numerical simulation. Furthermore, model experiments were carried out using Real-time Kinematic GPS (RTK-GPS) at pond to verify the effectiveness of the algorithm for automatic collision avoidance. It is shown that the collision avoidance system functions well both on numerical simulation and model experiments.
著者
斉藤 雅樹 小倉 秀 木本 弘之 山田 吉彦 永水 堅 福士 久人
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 (ISSN:18803717)
巻号頁・発行日
no.2, pp.9-18, 2005-12
被引用文献数
1

Sugi bark sorbent (SBS), which is recycled waste, is comparable to commonly used petroleum products in performance and cost and has lower environmental loads. It has been commercially produced since 2001. For the purpose of reducing total environmental loads in the oil recovery, we investigated biodegradation disposal of SBS after use (after adsorbing oil), instead of incineration disposal. It was confirmed that the oil content was reduced from 14,300±1,600ppm to 1,500±500ppm after 164 days-period (36m^3 site), and reduced from 8,600±900ppm to 1,400±400ppm after 170 days-period (100m^3 site) in a biodegradation experiment using Bunker C in the bark compost (background : 430±140ppm).
著者
T.Z.K.
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.104, pp.8-9, 1930-11
著者
S.O.
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.103, pp.24-31, 1930-10