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Mitsuo FUKUTANI
Pages
1
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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1. Chair seats rooms have some problems about view, taking on/off chair seats and isolation of passages.
2. For example, in the case a wheel house is arranged before a chair seats room , we cannot get view by means of front faced chairs.
3. Planning views, we must draw estimated view lines and if necessary consider sides faced chairs.
4. View is not only supply enviroment but also mental safety. So, we must recognize space location.
5. Last, we display improved chair seats room cabin arrangement.(centre line passage + transversely branched passage +)
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Tetuya Yao, Eiichiro Imayasu, Yoshitaka Maeno, Yasunari Fujii
Pages
2
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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The ultimate longitudinal strength of a hull girder is, in usual, analysed for the cross-section where the maximum longitudinal bending moment occurs. In this case, the effect of shear stress is not considered. There may exist,however, a cross-section having a similar magnitude of bending moment together with large shear force for example in case of an alternate loading condition of bulk carriers. The progressive collapse analysis by the Smith's method was carried out to estimate the ultimate longitudinal strength of a hull girder cross-section taking the effect of shear force into consideration.
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Eiichi Kobayashi, Syunichi Koshimura, Masayoshi Kubo
Pages
3
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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Tsunami attack generates not only the raise of sea surface but strong horizontal current in the bay It is very important for marine disaster prevention to grasp the drifting motion of the vessel caused by the tsunami curent. According to the ship drifting simulation by tsunami at the bay of Owase, Mie Prefecture, we found a possibility that a vessel collides with a berth, and also a possibility of ship grounding by the tsunami current. Such results suggest that still more detailed examination is required in the future
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Hajime Kihara
Pages
4
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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The water entry problems of a wedge with constant vertical velocity are studied by using a boundary element method. The computational models about jet flow are proposed and these are applicable to the problems for wedges with various dead rise angles. In addition, it turned out that the singularities at a bottom vertex were apt to lose the precision of local pressure values. Accordingly we introduce the analytical description of the flow in a local domain around the vertex. These solutions can be determined by solving integral equations with the solutions in the other domain.
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pingjian liu, Eiichi Kobayashi
Pages
5
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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The transportation of noxious liquid substance often poses a serious threat to the environment. Accidents are easy to take place from the pipe in the port area. This paper mainly deals with the Carbon tetrachloride spill in a port of Shanghai. After introduction of the history environment data, the diffuse model has been given out. Through analysis and simulation, the authors give concentration and dose analysis of supposed accident, and some risk assessment, such as cancer risk, the lethal rate etc. In the end, the authors give some suggestions to less the harm to people nearby.
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A Case of A Comparative Evaluation Between SWATH and Pod-Shaped Hullforms.
Shinsuke Akagi, Mitsue Morishita, Fumio Nakahata
Pages
6
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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TAKESHI UEDA, YASUNORI IWASAKI, KAZUYUKI EBIRA, MASAKI ANDA
Pages
7
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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In the previous paper, the authors showed a New Stem named SEA-Arrow to improve the propulsive performance of medium-speed ships such as LPG carriers. Having no protrusion of bulb, the SEA-Arrow can reduce the bow waves and greatly increase the propulsive performance in the design condition. In order to evaluate the propulsive performance of the SEA-Arrow, the voyage data analysis of the SEA-Arrow and the conventional hull form ship was carried out. This paper describes the comparison of the propulsive performance of the SEA-Arrow and the conventional hull form ship based on the voyage data analysis.
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YUGO SANADA, YASUYUKI TODA, TOSHIO SUZUKI
Pages
8
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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KAZUTO IKEDA, MASAKAZU ARIMA, RYUUSUKE HOSODA
Pages
9
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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Basic Simulation of Ship Positioning by Ship Maneuvering and Experiment by a Real Ship
Haibo Xia, Shigeaki Shiotani, Eiichi Kobayashi, Nobukazu Wakabayashi
Pages
10
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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The final object of this research is the construction of Weather Routing System for a relatively small vessel in the coastal sea area and assessment effects of safety and economic by this system. The weather routing is optimum navigation based on weather and sea condition which varies at real time. This paper deals with the estimation method of ship position considering the ship maneuverability. The simulation of sailing ship was compared with the experimental result by a real small vessel. It was concluded that this simulation method was effective for weather routing system.
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(Part3 Motion and Drift Force of Various Types of Shipson Damaged or Broken Condition)
Shoichi Hara, Kunihiro Hoshino, Kazuhiro Yukawa, Kenji Yamakawa
Pages
11
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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Toru Katayama, Ryo Kimoto, Takashi Iida, Yoshiho Ikeda
Pages
12
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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Measurements of running attitude (;rise, trim angle and heel angle) and 3-components of hydrodynamic forces (;drag force, sway force and yaw moment) are carried out for 1m-sized models by an obliquely towing test. The ratios of length to breadth of the models are L/B=6.0, 4.5 and 3.0, and their range of Fn is from 0.3 to 1.8. The results demonstrate that the heel angle is drastically changed by drift angle, Fn and L/B. The change in running attitude causes significant effects on yaw moment. It is also found that rise and trim angle are significantly affected by drift angle. The results suggest that it is necessary for predicting maneuverability to take the effects into consideration.
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Kazuyoshi Maekawa, Keiichi Karasuno, Yusuke Ashida
Pages
13
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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The authors developed a component-type mathematical model of hydrodynamic forces acting on a ship hull in steering motion and the availability of this model have been confirmed by experimental data. This model describes longitudinal force, lateral force and yaw moment, and it can cover a wide range motion with small to large yaw rate and drift angle. In this study, we developed a model of heel moment consist of lateral force elements. With this model, heel moment can be estimated with hydrodynamic characteristics analyzed from the above-mentioned other forces.
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hiroshi kawabe, yositaka maeno, hajime ohtani, yasunari fujii, tetsuya ...
Pages
15
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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To assess the safety of a ship structure from the viewpoint of longitudinal strength, a series of progressive collapse analysis was performed on existing ships, and their ultimate longitudinal strength as well as sensitivities with respect to several design parameters were obtained. At the same time, wave-induced bending moment was calculated in a short-term irregular wave, and probabilistic characteristics of the wave-induced bending moment were obtained. On the basis of these results, reliabilty indeces were calculated, and the safety assessment was performed on existing ships.
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SADAYOSHI CHIAKI, AKIO SAKURAI, NAOKI OOSAWA
Pages
17
Published: 2004
Released on J-STAGE: December 07, 2004
CONFERENCE PROCEEDINGS
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On the purpose of predicting the young's modulus of marine composite under cyclic loading. The authors induced a simple mathematical model for the cyclic stress-strain curve. From the comparison of the calculation to some experimental results, a tendency of the prediction was verified. Furthermore the static buckling strength was calculated using the modulus and the result showed a satisfactory tendency.
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