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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 洪振發 | |
dc.contributor.author | Sheng-Yang Wu | en |
dc.contributor.author | 吳昇洋 | zh_TW |
dc.date.accessioned | 2021-06-16T05:07:56Z | - |
dc.date.available | 2014-08-25 | |
dc.date.copyright | 2014-08-25 | |
dc.date.issued | 2014 | |
dc.date.submitted | 2014-08-19 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/55741 | - |
dc.description.abstract | 艙間未充滿水的自由液面因艙體運動產生晃動而造成艙壁週期性的沖激壓力稱為沖激現象(Sloshing) ,它是一種非常複雜的流體運動。當船艙間部分充水時,自由液面會隨著船體運動而晃蕩拍擊艙壁,若船舶發生破撞時,其沖激力與沖激週期對船舶抗撞性能可能會有影響;近年來國際上對海洋環境保護與海洋維護以及對人員安全的重視,為使船舶事故發生所引發損傷降到最低,在船舶抗撞結構與航行安全有特別考量。本文探討船舶艙間部分充水對船舶抗撞性能的影響;主要內容為分析部分充水的水箱在給定速度變化下,自由液面晃動的沖激現象,並將其流體週期性沖激力以等效質量-彈簧-阻尼系統代替,以簡化問題模型,並應用於8,000 TEU貨櫃船機艙段遭受同級貨櫃船側向撞擊過程的結構損壞與衝擊狀況,以等效「彈簧-質量-阻尼」系統代替部份充水艙間的水面沖激效應之吸能與沖激力效應,比較5種不同艙間充水狀況在碰撞後,撞擊船之船艏與被撞船之機艙段產生的破壞狀況。本研究以LS-DYNA非線性有限元素程式進行船舶碰撞分析,分析結果顯示船側艙間局部充水沖激效應可吸收部分能量,可提高被撞船抗撞能力,降低撞擊破壞程度。但船艏艙間局部充水無法增加被撞船的抗撞能力。 | zh_TW |
dc.description.abstract | The sloshing phenomenon is a flow impact inside a fluid tank with a free surface and is a very complicated fluid dynamics problem. Partial filled fluid tank in ship will induce sloshing effect to impact the tank periodically when the ship is in time varied motion. In order to protect the ocean environment and to promote the crew's safety, as well as to minimize and damage after accident, some designs for anti-collision has been taken into consideration. In this paper, the sloshing effect of the partially filled fluid tank in container ships on the crashworthiness in ship collision was investigated. The sloshing impact in the rectangular tank was analyzed. And an equivalent mass-spring-damper system model to simulate the periodic sloshing impact induced by specified has been derived. The 8000 TEU container ship with partially filled fluid tank was selected as case .The structural damage and the crashworthiness of structures for container ship's bow striking the engine room section of the 8000TEU container ship have been investigated. The structural damage among five partially filled conditions after striking were compared. The LS-DYNA nonlinear finite element analysis program was used to analyze the ship collision in the paper. The results show that the partial filled fluid in side tank can improve the crashworthiness of struck the ship structures. On the contrary, the partial filled fluid in bow tank can not improve the crashworthiness of struck the ship structures. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T05:07:56Z (GMT). No. of bitstreams: 1 ntu-103-R01525014-1.pdf: 21533540 bytes, checksum: a0ac29fa756607e53e01aec6330cd11d (MD5) Previous issue date: 2014 | en |
dc.description.tableofcontents | 目錄
中文摘要 I Abstract III 目錄 V 圖目錄 IX 表目錄 XVII 第一章 緒論 1 1.1 研究動機 1 1.2 文獻回顧 3 1.3 研究內容 5 第二章 船舶結構的基本力學理論 7 2.1 材料力學特性 7 2.2 應變率對材料的影響 10 2.3 船舶碰撞理論簡介 12 2.4 研究內部力學的方法 14 第三章 沖激現象 19 3.1 沖激現象簡介 19 3.2 Fluent運算分析 19 3.3 分析模型 21 3.4 船側水箱五分滿0.1m網格分析 23 3.5 船側水箱八分滿0.1m網格分析 31 3.6 船側水箱充水五分滿與八分滿之比較 38 3.7 船艏水箱充水五分滿0.1m網格分析 38 3.8 結果討論 45 3.9 動壓力與網格大小關係 45 第四章 沖激現象之等效模型 55 4.1 理論簡介 55 4.2 船側及船艏水箱之等效模型 59 4.2.1 等效模型之解析解推導 59 4.3 船側水箱五分滿 60 4.4 船側水箱八分滿 66 4.5 船艏水箱五分滿 71 第五章 貨櫃船船艏撞擊船側機艙段之撞擊分析 79 5.1 有限元素模型 79 5.2 附加質量 87 5.3 分析狀況 89 5.4 被撞船船側艙間充水模型 91 5.5 撞擊船船艏艙間充水模型 92 5.6 分析結果 94 第六章 結論與未來展望 111 6.1 結論 111 6.2 未來展望 112 參考文獻 115 | |
dc.language.iso | zh-TW | |
dc.title | 部分充水艙間沖激現象對船舶抗撞性能之影響 | zh_TW |
dc.title | The Sloshing Effects of Partially Filled Liquid Tanks on the Crashworthiness in Ship Collision | en |
dc.type | Thesis | |
dc.date.schoolyear | 102-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 王偉輝,宋家驥,邱進東,周志明 | |
dc.subject.keyword | 自由液面,沖激現象,等效質量-彈簧-阻尼模型,船舶碰撞,抗撞能力, | zh_TW |
dc.subject.keyword | sloshing,equivalent spring-mass model,ship collision,crashworthiness, | en |
dc.relation.page | 116 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2014-08-20 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
顯示於系所單位: | 工程科學及海洋工程學系 |
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