共查询到20条相似文献,搜索用时 187 毫秒
1.
行驶于海洋中的VLCC油轮进入多沙水域港口、卸油置换压载舱水配重时,带来压载舱内泥沙的淤积。文章以舟山水域为背景,以油轮边压载水舱作为研究对象,分析油轮边舱泥沙运动规律及泥沙淤积的成因,提出采用气动冲沙的方法处理压载舱泥沙,为行驶于海洋中的大型油轮和船舶压载水舱泥沙提供合理的清淤管理。 相似文献
2.
3.
无压载水舱船舶的研究进展 总被引:2,自引:0,他引:2
为了保证船舶空载时的平衡和稳性,船舶需要装载压载水航行,以达到降低船舶重心的目的.但是,压载水舱的海水排放出去,会造成海洋生态污染.为了彻底解决压载水带来非本土水生物种的问题,最近几年国外科研人员提出了具有创新思想的无压载水舱船舶概念.本文介绍了这一新技术的研究概况,希望有助于国内无压载水舱船舶的研究以及设计开发. 相似文献
4.
主要介绍用于船舶或海洋工程构筑物平地建造后下水的12000t举力半潜驳船压载系统的设计及其特点,包括船舶概况、压载水舱的布置、飘浮状态进行平移装船作业的基本条件、在特定的装船作业条件下如何使船舶保持浮态和静力平衡的分析、压载水舱配载计算、压载泵和管路的设计、压载水舱透气系统的设置以及压载水舱配载调载的操作要求等。 相似文献
5.
7.
8.
今年2月,本刊特约大连远洋公司副总经理李玉平撰文,对船舶在我国港口水域遭遇到的压载水多泥沙难题进行了剖析。文章刊出后,引起业界普遍关注。7月20日,中国油轮安全论坛召开之际,当我们再次遇到李玉平时,他欣喜地告诉记者,油轮压载舱泥沙困扰已经有望解决,防泥沙船型呼之欲出。 相似文献
9.
双层底是船体的强力板架结构,能够承受海浪的压力和梁的相当弯曲应力。双层底还可以作为油舱,清水舱和压载水舱等。一般储藏燃油最为理想,使燃油处在船内最低位置,有利于船舶的稳性。双层底作为压载水舱,以便空载和燃油日益消耗时保持应有的稳性。当船舶发生事故时,通常双层底的舭部易于破损。为了不致使船用燃油外溢造成污染,舭部都布置为压载水舱。 相似文献
10.
随着《国际船舶压载水及沉淀物控制和管理公约》的执行日期越来越近,安装压载水处理设备也渐渐成为船舶设计时要考虑的问题。尝试取消超大型油船(VLCC)尾压载水舱,探索减少为其专门配置的一套压载水处理设备的可能性,并对取消尾压载水舱前后的经济性进行了对比。 相似文献
11.
12.
对12000立方米支线LNG船市场和总布置做了简要介绍,通过对比IGC新旧版本在破舱稳性上的变化和在12000立方米支线LNG船上的应用,探讨了其对实船的影响,通过改变总布置、初始工况和开口位置,来改善该船破舱稳性,使其满足新IGC要求。 相似文献
13.
大型半潜船压载水系统设计 总被引:1,自引:0,他引:1
为安全可靠地实现半潜功能,根据某半潜式自航工程船压载舱众多的特点,采用空气压载系统与泵压载系统相结合进行设计。试航结果显示:压载水系统的设计能够安全实现该半潜式自航工程船海上半潜作业功能,达到技术规格书中的有关要求。 相似文献
14.
15.
Jing Chen Yan Lin Jun Zhou Huo Ming Xia Zhang Zhuo Shang Ji 《Journal of Marine Science and Technology》2010,15(3):280-293
The quality of the ballast water exchange scheme affects many aspects of a ship, including intact stability, structural strength, building and operational expenses, etc. This paper focuses on developing an optimization methodology for large-scale sequential ballast water exchange. The method of transversely symmetrical ballast water tanks being exchanged simultaneously is adopted, and the potentials of multiple tanks being exchanged at a time are explored. The mathematical model for the symmetrical ballast water exchange problem is built by minimizing the occurred maximum trims, maximum hull girder bending moments, and shearing forces as objectives, and the related safety assessment criteria as constraints. A multiobjective genetic algorithm with some operators specially designed for the problem is presented to obtain a set of approximate Pareto-optimal solutions for engineers to choose from. Finally, a real case study on the symmetrical ballast water exchange of a 176,000 DWT bulk carrier is conducted to illustrate the effectiveness of the proposed approach. 相似文献
16.
随着造船技术的发展,对于一些高新船舶,尤其是LNG船,海水对压载管路提出了更高的要求,同时在管路的布置上也产生了更多的限制。针对LNG船压载水排舷外管路及涂塑要求进行了阐述和分析,优化船舶压载水处理装置的管路布置,形成一套高效、节约且满足趋势要求的压载水管路布置方法。 相似文献
17.
压载水管理是船舶环保要求的重要内容。不同的压载水管理方式对船体结构安全的影响不同,主要体现在压载舱的附加压头、最小砰击吃水等。基于协调版共同结构规范对压载水交换工况的新要求,论述在CSR-H规范框架体系下,压载水交换工况下的静水弯矩和设计载荷组对船体结构构件的影响,并提出基于结果评估的相关建议。 相似文献
18.
Patrick Donner 《WMU Journal of Maritime Affairs》2010,9(2):191-199
After a brief overview of the International Convention for the Control and Management of Ships’ Ballast Water and Sediments
(BWM Convention), 2004, the status of ratification and its applicability to ships the main methods for ballast water treatment
required by the BWM Convention are introduced. Port-based reception and treatment facilities would offer many benefits compared
to treatment of ballast water on board — shore-based facilities would be more efficient and provide both economical and environmental
advantages. The choice to impose the ballast water treatment obligations on the ships and their crews may have been the solution
of least resistance, but it may also be the solution, which represents the least efficiency and the greatest overall cost
as well as a potential for negative consequences for the crew responsible for ballast water management. 相似文献
19.
Centrifugal forces are commonly created when ships turn, which may cause a ship to capsize in a critical situation. A mathematical model has been developed to optimize the stability coefficients for ship, with the aim to prevent capsizing and to increase ship maneuverability in high-speed water craft. This model can be used to develop algorithms for control system improvement. The mathematical model presented in this paper optimized the use of multipurpose hydrofoils to reduce heeling and the trimming moment, maintaining an upright ship’s position and lessening the resistance via transverse force. Conventionally, the trimming and heeling of a ship are controlled using ballast water; however, under variable sea conditions it is sometimes difficult to control a ship’s motion using ballast water. In this case, a hydrofoil would be more stable and maneuverable than a ballast tank controlled vessel. A movable hydrofoil could theoretically be adapted from moveable aerofoil technology. This study proves the merit of further investigation into this possibility. 相似文献
20.
CSR对超大型油船装载及压载舱分舱的影响 总被引:3,自引:0,他引:3
国际、国内的油运市场对超大型油船(VLCC)的需求非常迫切。油船结构共同规范(CSR)不仅对VLCC结构设计的影响是全面和系统的,还对VLCC的装载工况和压载舱分舱方案有很大的影响,而这些因素直接决定了船体的最大中拱静水弯矩。该文针对30.8万吨VLCC,对CSR进行了研究,通过装载计算,初步阐明了CSR对VLCC装载工况和压载舱分舱设计的影响。 相似文献