著者

増田 光弘 南 清和 増田 光一 居駒 知樹

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

vol.19, pp.61-68, 2014 (Released:2014-08-28)

参考文献数

13

---

When the tsunami attacks in harbors, the vessels moored at a wharf may be unable to be evacuated. For example, it may happen the situations that the vessel is under cargo handling, the vessel has no crew or only foreign crew without knowledge of tsunami. In such a case, the following damages are assumed; breaking the mooring tether, grounding on a wharf, drifting to land areas and destroying buildings. This present paper describes the tsunami simulation and the motion analysis of vessel moored at a wharf using the MPS method (Moving Particle Semi-implicit method).In this research, the 3D-MPS method is applied. The chart of break of mooring tethers was created. The wave height of tsunami, draft of vessels and the relation of the break of the mooring tether were shown by the chart of break of mooring tethers. Then, the chart of break of mooring tethers is proposed for various scale of tsunami including the effect of incident angle of the mooring tether can be easily estimated against to the scale of tsunami and mooring system.

著者

増田 光弘 南 清和 増田 光一 居駒 知樹

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

vol.25, pp.183-190, 2017 (Released:2017-09-06)

参考文献数

9

被引用文献数

1

---

When tsunami attacks a harbor, the vessels moored at the wharf are exposed to a risk. For example, the following damages are assumed; breaking the mooring tether, grounding on a wharf, drifting to land areas and destroying buildings. In the previous report, the motion analysis of mooring vessels in tsunamis and the usefulness of tsunami protection measures by the install more mooring tethers (IMMT) was described using the MPS method. The incident wave angles of tsunami were used the 0 degrees (longitudinal wave) and 90 degrees (Transverse wave). For any incident angles, IMMT was effective. However, in the case of transverse wave of wave height 6.0m or more, it is possible to prevent the break of the mooring tethers, but it was confirmed that the vessels damaged by the grounding on a wharf. In the case of longitudinal wave, IMMT confirmed that it did not affect in some cases. It is influenced by the direction the mooring tether pulls. When the vessel moves, there are mooring tethers that are pulled or slacked. As a result, the mooring force does not act equally on the mooring tethers. Also, as an issue of existing papers, studies on oblique waves were not done. It is important to solve these issues.In this present paper, the influence of the oblique wave is studied. The extent of damage of longitudinal waves, transverse waves and oblique waves are compared through a numerical simulation method, the 3D MPS method. The 3D MPS method is used for numerical simulation. In this paper, quaternion is applied to the algorithm of rotational motion of the floating model. Furthermore, a more effective mooring method for longitudinal wave is proposed, and its effectiveness is demonstrated.

著者

轟 朝幸 居駒 知樹 江守 央 川崎 智也 兵頭 知 桐島 弘之

出版者

日本大学

雑誌

挑戦的萌芽研究

巻号頁・発行日

2015-04-01

---

日本において水上飛行機による航空運送事業が2016年に半世紀ぶりに再開された.しかし,水上機が離発着する水域を利用している船舶や漁業などから水上機の離発着への懸念が示されている.そこで,水上機運航が活発なカナダ,アメリカ等の先進事例調査を実施した.その結果,水上機離発着場が数多く整備され, AIP(航空路誌)にて公表していた.水上機の離発着数が多いバンクーバー等では,航空管制などによる運航支援システムが整備され,狭あいな入江のヴィクトリアでは,水上機と船舶の利用エリアを区分した運用ルールを整備していた.これらのように,水上機と船舶などがともに安全に運航できる環境整備が進められていた.

著者

増田 光一 有田 守 佐野 堅一 前田 久明 居駒 知樹 鈴木 圭太

出版者

Japan Society of Civil Engineers

雑誌

海岸工学論文集 (ISSN:09167897)

巻号頁・発行日

vol.45, pp.846-850, 1998

著者

惠藤 浩朗 佐藤 千昭 増田 光一 居駒 知樹 清水 研 畔柳 昭雄 山口 順子

出版者

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

vol.19, pp.245-253, 2014 (Released:2014-08-28)

参考文献数

18

---

An innumerable number of buildings in the coastal part of the east side of Japan were devastated by the Great East Japan Earthquake and Tsunami. Medical institutions also suffered the damage caused by tsunami, and the function to carry out the medical act has been spoiled. And the disabled concentrated on the medical institution which avoided tsunami damage. Under such circumstances, assistance from the water area began three days after the earthquake disaster, and much support supplies reached the stricken area. It was revealed that the support from the water area including the river was extremely effective against the stricken area.And then, the Tokyo Inland Earthquake disaster was assumed, floating medical support system installed in the quay of Arakawa River in Tokyo was proposed. Floating medical support system is movable; furthermore, it is built in the structural system of having very high isolation characteristics. Therefore, feasibility study such as selection of suitable setting position of this floating structure on Arakawa River, floor planning and flow planning at the time of always and a disaster, facilities and storage of various material,structural strength of the floating base, and the effects of disaster risk reduction was carried out about floating medical support system.

著者

前田 久明 増田 光 林 昌奎 居駒 知樹 伊藤 和彰 加納 裕三

出版者

公益社団法人日本船舶海洋工学会

雑誌

Techno marine : bulletin of the Society of Naval Architects of Japan : 日本造船学会誌 (ISSN:09168699)

巻号頁・発行日

no.866, 2002-03-10

---

本論文の目的は,幾何学相似モデルを用いた実験を行い,VIVによるライザーの挙動を把握することである。海象条件を模擬した一様流中,あるいは波浪中,強制動揺下においてライザーの挙動計測実験を行い,結果として,VIVがライザーの高次モードの変形に寄与していることを把握した。また,ライザーのトップテンション,表面粗度がライザーの挙動に大きく影響することを確認した。[graph]