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原稿種別: 目次
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鍋島 健治郎, 表 正和, 上野 章, 山本 博敬, 森本 孝, 多田納 久義
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1-6
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朴 眞〓, 大津 皓平
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7-11
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湯室 彰規
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13-16
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上野 道雄, 二村 正, 藤原 敏文, 野中 晃二
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17-22
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正岡 孝治, 清川 渉, Alejandro L. Talavera Campos, 岡田 博雄, 室津 義定
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23-28
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遠山 泰美, 明石 委子
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29-34
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This paper focuses on the method of vibration analysis of a wetted bottom structure of a narrow tank in ships. The natural frequencies of a simply supported bottom panel are analyzed by means of analytical energy method, boundary element and finite element techniques. Comparing the results, the numerical accuracy of the natural frequencies depending on the methods and mesh sizes has been investigated. The vibratory responses of the bottom panel are also analyzed for the case where the tank is enforced to vibrate in vertical direction with given acceleration.
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坪郷 尚, 岡田 博雄
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35-40
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坪郷 尚, 岡田 博雄
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41-46
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大塚 耕司, 田原 裕介, 池田 良穂
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47-52
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村岸 治, 吉川 孝男, 佐野 淳, 高坂 明, 佐岡 俊次郎
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53-58
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An airplane or its engine was possibly supposed to drop on a large floating structure, which is planned to be a marine airport. The structure is mainly constructed with steel and paved with concrete slabs. The damage of the floating structure with and without concrete pavement was investigated by numerical simulation. A non-linear dynamic finite element analysis program with explcit integration, LS-DYNA3D, was utilized tocal culate the behavior of concrete fracturing. By simulation, the colliding phenomena, absorbed energy on the deck, and engine penetration were calculated. By parametric calculations, it was found that the concrete pavement was effective to increase impact energy absorption against an engine collision and the assumed construction of deck was strong enough against airplane collision. A simplified model for parametric calculation was introduced.
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根木 勲, 多田 剛
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p.
59-63
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A new Finite Element by Source method, or FES, has been developed by the authors. FES which has flexible geometrical shape is composed by nodes distributed on the element boundary and sources distributed out of the element boundary. The relation between the intensity of sources and the boundary condition at the nodes is obtained from the combination of the fundamental solution. According to this procedure, we can perform numerical analysis dealing with complex structures such as ships with further less mesh compared with the existing finite element method and we can obtain more accurate results. This paper presents the application of plate element for three-dimensional plate structure and some numerical examples to actual ship structures in order to show its usefulness.
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船木 俊彦, 林 茂弘, 植田 俊司
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p.
65-69
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船木 俊彦, 林 茂弘, 平井 義夫
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71-75
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松本 亙平, 齋藤 年正
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p.
77-79
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濱野 哲也, K.K. Roby, 池田 良穂
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81-86
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片山 徹, 池田 良穂
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p.
87-92
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谷澤 克治, 内藤 林
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p.
93-98
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In this study, a numerical approach is taken for the fully nonlinear analysis of the interaction between an incident wave and low-frequency oscillatory motion of a floating body. Using the fully nonlinear simulation method, three motions of a moored two-dimensional body are simulated in presence of a regular wave field and the hydrodynamic force due to the interaction is extracted from horizontal hydrodynamic force act to the body. Based on this numerical study, added mass and damping coefficient due to the interaction are analyzed and a rational explanation of wave-drift damping is proposed. The relation between this explanation and the conventional explanation based on quasi-steady analysis is discussed.
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平山 次清, 河内 功, 宮川 清, 高山 武彦
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p.
99-104
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鈴木 敏夫, He Moqin
原稿種別: Article
p.
105-109
発行日: 1997/05/23
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A new method was proposed to measure the wave pattern resistance. This method analyzes the projected light distributions around ship models and gets wave amplitude functions of P and Q directly. The wave pattern resistance was calculated by an integration of the wave amplitude functions. Numerical simulations have been made and results shows good agreement with the original input data. Discussion and suggestions are made at last.
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西尾 茂, 奥野 武俊, 平田 奈美
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p.
111-114
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田原 裕介
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p.
115-120
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田中 佳行, 鈴木 勝雄
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p.
121-126
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塚田 吉昭, 日夏 宗彦, 長谷川 純
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p.
127-132
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北村 哲也, 田原 裕介, 姫野 洋司
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p.
133-138
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成田 秀明, 笠原 良和, 廣田 和義, 代田 國彦
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p.
139-144
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笠原 良和, 成田 秀明, 増田 聖始, 廣田 和義, 代田 國彦
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p.
145-149
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増田 聖始, 笠原 良和
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p.
151-156
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高橋 孝仁, 角川 明, 川島 英幹, 児玉 良明
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p.
157-161
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内藤 林, 高岸 憲璽
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p.
163-168
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辻本 勝, 内藤 林
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p.
169-174
発行日: 1997/05/23
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In this paper, a new theoretical method to estimate the ship speed in actual seas using probabilistic method is proposed. The speed loss is classified into the following five factors : (1) aging effect, (2) fouling effect, (3) wave effect, (4) wind effect and (5) ocean current effect. These effects are described with probability density functions. As all factorsa are independent of each other, the convolution integral is available for obtaining the joint probability density function of them. A container liner is selected for the calculation and her service route is Pacific South-West Coast route (PSW). A long term prediction for 10 years is conducted using wind and wave statistics of the route.
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増山 豊, 高山 将光, 塚本 能人, 箱崎 善彦, 植村 公彦, 伊藤 通洋
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p.
175-179
発行日: 1997/05/23
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The solar boat project at the Kanazawa Institute of Technology (KIT) was started in 1991 as a student research theme. From 1995, a fully submerged hydrofoil system has been installed for the solar boat in order to reduce wave making resistance of the hull. The performance of the solar boat was affected by factors such as the performance of the propellers, drive system, and the hull resistance. Several tests and experiments were performed understand these factors clearly. Two-bladed propellers were designed. A testing apparatus for the propeller was constructed and measured the propeller performance on the sea. Hull resistance with the hydrofoil wa s measured in a towing test on the sea. Boat speed was estimated by using the data of propeller performance and the hull resistance. The estimated values were showed as a good comparison to the characteristics of the actual solar boat. The results of these tests were used for designing an optimum solar boat.
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赤木 新介, 多田 浩之, 中畠 章央, 藤田 喜久雄
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p.
181-186
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重廣 律男, 上田 耕平, 有井 俊彦, 中山 博
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p.
187-190
発行日: 1997/05/23
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The high-speed-towed fish preserve is a new type vessel about 15.6m long with a fish preserve capacity of 200m^3.The ship is supposed to be towed efficiently with a lighter draft(about 0.8m)at a maximum speed of about 10 knots(Fn=0.42).The lateral area ratio between a supper structure and a hull is about 5.3 in a lighter draft.The course stability of the ship might be affected by the wind forces and wave forces.Especially the wind forces are stronger than wave forces in a lighter draft.In this paper, we present the course stability characteristics of the towed fish preserve with wind effects in high-speed range.We conducted the model experiment tests in wind tunnel and in a circular tank.Also we performed the simulation studies to investigate the course stability for our models.The results of our experiments and simulation studies are described and discussed.
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長谷川 和彦, 滝本 忠教, 早川 勇
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p.
191-196
発行日: 1997/05/23
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It has passed 10 years since the first author and others have engaged in the research of automatic navigation system. It was started from automatic collision avoidance system(ACAS)treating with only but various two-ships encounters. Soon after it was expanded to an expert system called SAFES(Ship Auto-navigation Fuzzy Expert System), in which any situation with multiple ships can be solved. At the same time, simulation programme called SMARTS(each-Ship-with-captain Marine Traffic Simulation)was developed for the purpose of the system verification and evaluation. Apart from its primary purpose, it was found to be used as a realistic marine traffic generator and rather utilised for various applications such as 1) automatic background traffic generator in ship handling simulator(intelligent ship handling simulator)and 2) evaluation of specified waterways for safety assessment or waterway design(so-called micro simulation). Both systems was reconfigured and rewritten by real-time simulation language G2.
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