An economic assessment of fluidized-bed boilers in Australian merchant ships

Fluidized-bed boiler systems have sparked the enthusiasm of many in the past few years as an answer to many technological problems as alternate energy sources are investigated. Although still barely out of the experimental stage, ship designers are mooting the possibility of fluidized-bed combustion technology being applied in ship propulsion. This paper outlines briefly its process and discusses the economics of such a venture.     

Manoeuvring characteristics of twin-rudder systems: rudder-hull interaction effect on the manoeuvrability of twin-rudder ships

With a recent increase in ship capacity and propulsion performance, a wide-beam ship fitted with a twin-rudder system has been adopted in many cases. However, to improve ship manoeuvring, it is still necessary to have a better understanding of rudder-hull interactions in twin-rudder ships. Captive model tests (oblique towing and circular motion test) as well as free-running tests with a single-propeller twin-rudder ship and a twin-propeller twin-rudder ship are carried out. The effect of drift angle on the rudder forces and some peculiar phenomena concerning rudder normal force for twin-rudder ships are evaluated. A method for estimating the hull-rudder interaction coefficients based on free-running experimental results is proposed.     

An empirical assessment of relational competitive advantage in professional ship management

Intense competition in many sectors across the maritime industry and in professional ship management in particular, means that the quest for achieving competitiveness will continue and intensify. A review of the current strategies across many sectors of the industry indicates the importance of forging stable partnerships for the achievement of competitiveness. Considering that the capability to form a relationship is an intangible resource (as depicted in resource-advantage theory), an empirical assessment in the context of ship management was undertaken. The assessment aimed to identify the type of relationships present in ship management, and succeeded in classifying those relationships into four distinct groups. The central thesis of the paper is that maritime organizations in general, and ship management companies in particular, may utilize their intangible relational resources in order to achieve competitive advantage. Based on the classification of ship management relationships, implications for managers are discussed.     

船舶机电CAD综合设计系统的探讨

较清晰地描述了以Auto CAD为平台的“船舶机电CAD综合设计研究”的开发,分析了设计系统的功能需求,数据库模型,系统的功能和开发特色,指出我国在船舶CAD领域虽然开发能力不足,但完全可以依靠现有产品和技术,进一步挖掘计算机辅助设计的潜力,对同行有较好的参考价值。     

An empirical assessment of relational competitive advantage in professional ship management

Intense competition in many sectors across the maritime industry and in professional ship management in particular, means that the quest for achieving competitiveness will continue and intensify. A review of the current strategies across many sectors of the industry indicates the importance of forging stable partnerships for the achievement of competitiveness. Considering that the capability to form a relationship is an intangible resource (as depicted in resource-advantage theory), an empirical assessment in the context of ship management was undertaken. The assessment aimed to identify the type of relationships present in ship management, and succeeded in classifying those relationships into four distinct groups. The central thesis of the paper is that maritime organizations in general, and ship management companies in particular, may utilize their intangible relational resources in order to achieve competitive advantage. Based on the classification of ship management relationships, implications for managers are discussed.     

舰船全寿期配置管理及其编码映射技术研究

舰船全寿期各配置视图,既是全寿命优化设计的结果,又是实现舰船预期功能并保证这些功能有效实施的关键技术.为保证配置的唯一性和处理方便,配置是用各主要编码来表达的.本文所提出的各配置之间的算法乃是实现配置自动处理的基础.舰船全寿期配置管理是实现各配置视图生成、相互映射、配置更改及其状态跟踪技术的综合应用,亦是保证舰船质量和有效使用及全寿期信息共享的核心.     

拆船业春天里的“一抹绿”

中国拆船业在绿色环保方面已达到世界先进水平,目前已成为国际船东进行船舶拆解的首选,但受南亚等国拆船企业拆解水平、落后低标准设备的压力,在价格竞争中受到一定的制约。中国拆船企业应当把握市场新机遇,充分发挥自身在绿色拆船领域的优势和实力,采取措施规避不利因素,使中国拆船业获得良好的可持续发展。     

船舶智能化研究现状与展望

智能化是船舶发展的重要方向。船舶智能化是在综合传感、通信、信息、计算机等多种先进技术的基础上,结合船舶具体应用环境,构建基于大数据、信息物理系统和物联网等特征的智能系统,使船舶航行、管理与服务更高效、更低秏、更安全和更环保。从大数据、信息物理系统、物联网三个方面介绍了船舶智能化的主要特征。从船舶智能航行和船舶智能管理与服务两个方面分析了船舶领域智能化现状和展望。船舶智能航行方面,探讨了综合船桥系统和无人驾驶的发展方向;船舶智能管理与服务方面,分析了水路ITS、交通流理论和数据分析方法的最新发展,并提出了基于可视分析解决船舶管理大数据处理的流程。     

一种小型船舶上排维修装置设计

船舶上排方式很多,根据吨位的不同一般采取不同的上排方式,文章主要针对小型船舶维修保养需要,设计了一种能够减少人工工时,又能够使船舶快捷安全上排的装置,完成船舶后续维修保养工作。     

基于CPC和动态联盟的船舶建造系统研究

倘若按敏捷制造理论来考虑船舶建造过程,将每艘船的设计和建造过程管理视为一个项目组并以此作为盟主,则各个分段加工中心和大量的配套厂是内外盟员且可组成一个动态联盟;若多艘船同时建造,则存在多个项目的动态联盟,并形成多层次和多交叉的形态. 本文在基于CPC理念的协同平台上将船厂、客户、供应商和合作伙伴引入船舶的开发和建造过程,通过有效的协作,将质量好、全寿命成本低的船舶更快地推向市场.文中对组建船舶建造多项目动态联盟的方式及其协调机制进行了分析和研究,并用多学科分析综合的方式提出了对船舶建造系统的模式及其功能进行评价的方法,为进一步研究和探索新的造船模式提供了参考.     

4500 CDWT化学品/成品油船设计问题的实船治理

针对4 500 CDWT化学品/成品油船运营中出现船尾振动剧烈、航速低、与设计航速相差甚远等诸多问题,进行实船治理。在尽可能减少改造成本的基础上,通过修改型线设计和CFD计算分析,选定优化设计的双尾船型对该船进行改造,改造仅局限于船尾机舱段设计吃水线以下部分。该治理方案达到了预期理想的设计效果,同时也满足了最经济的治理成本,可为出现类似问题的船舶提供宝贵的实船治理经验。     

上层建筑参加船体总纵弯曲程度研究

本文用有限元法及光弹性实验对某船的上层建筑与主船体之间的相互作用作了全面、详细的分析，得到各部位的各种应力分布曲线，在上层建筑的应力分析和有效性研究方面获得了许多有用的数据。在此基础上对有关上层建筑设计的某些方面进行了讨论。     

考虑算法的实船试航船速测量不确定度分析

实船试航中影响船速测量结果的因素很多,对其进行测量不确定度分析时应考虑的不确定度来源也有很多。采用“测量不确定度表示指南”规定的方法,将船速算法作为不确定度源,对其测量结果进行了不确定度分析。不确定度分析以某油船为例,分别考虑了实际航速平均法和逐点法两种算法,并对两种算法得到的结果作了讨论。     

Dawson方法在不同边界条件下的应用

本文对改进后的Dawson方法作了简单的描述，并且给出了船舶在开阔无限水深的海域、限制航道、凹型海底以及其他水下结构物存在的海域中航行时的计算例子。结果显示了改进后的Dawson方法以及计算程序的有效性，是一种可以用来预报不同工程问题中船舶兴波和船舶水动力的简单而实用的方法。     

剑潭枢纽船闸改扩建总体布置

在已建的船闸枢纽上进行船闸扩建受周边环境（已有船闸结构、配套设施、房屋）、边界条件等诸多因素的限制,设计工作难度加大。因此针对剑潭水利枢纽二线船闸工程,综合考虑枢纽水流条件、船闸通航条件、相邻建筑物安全及施工条件等因素,通过船闸错位布置、折线引航道、停泊段外放等工程措施,避让已有结构。在满足设计标准下,提出安全通航要求以及东江防洪要求的船闸布置方案,为设计提供重要技术支撑。剑潭枢纽船闸改扩建工程布置方案和相关技术措施可为周边环境复杂的改扩建船闸建设提供借鉴。     

基于AutoCAD平台的船体三维建模研究

目前,三维建模方法在众多设计领域中被广泛应用.简要介绍了在AutoCAD平台下船体三维建模的实体模型及建模中的几何算法,通过有针对性地研究对于提高船舶设计效率和质量,实现船舶设计信息一体化将具有一定意义.     

Association rule learning to improve deficiency inspection in port state control

ABSTRACT

The inspection of foreign ships in national ports is a critical measure in port state control (PSC), preventing substandard ships from entering national ports. Multifarious inspection items, limited inspection time and inspector manpower are challenging PSC inspection. This research applies data mining to analyze historical PSC inspection records in Taiwan’s major ports to extract potential valuable information for PSC onboard inspections. Using the Apriori Algorithm, the analysis identifies many useful association rules among PSC deficiencies in terms of specific ship characteristics, such as ship types, societies, and flags. The general rules identified show that the items ‘Water/Weathertight conditions’ and ‘Fire safety’ are significantly related. Besides, in the analysis of the various ship types, several different rules are found. After comparing the analysis of ship types and ship societies, it can be observed that the association rules for specific ship types, such as oil tankers, have a better effect than those for individual ship societies do. These identified rules can not only help inspectors effectively spot the associated deficiencies, but also improve the efficiency of PSC inspection. The ports other than Taiwan’s ports can apply a similar analysis method to identify corresponding association rules suitable for their own inspections.     

基于全耦合技术的船体结构碰撞性能研究

由于船舶碰撞问题的复杂性,通常是将船舶碰撞的外部机理与内部机理分开研究。作者基于“全耦合”分析技术,建立撞击船与被撞船整船模型,成功解决了船体与流场、撞击船与被撞船的耦合。此外,考虑撞击船与被撞船同步损伤,将内部机理同外部机理同步分析。通过数值仿真计算,分析了碰撞后撞击船与被撞船的运动、能量转化以及碰撞力、损伤变形及各构件的吸能情况。另外,开展多种碰撞工况计算研究,得出了便于工程应用的极限撞速曲线,为后续的船舶碰撞研究提供了技术支撑。     

远洋大型集装箱船动力装置选型论证

本文首先介绍了远洋大型集装箱船动力装置选型的变化趋势,就我国90年代将开发应用的3500 TEU 集装箱船主机选型,从船机桨匹配,燃油经济性,初投资,机舱布置,振动特性等多种因素综合比较分析优选得到最适宜的机型,此外,为提高3500 TEU 集装箱船的燃油经济性,对多种节能新技术进行了筛选.     

基于知识融合的船舶能耗决策支持系统

在建立船舶能耗评价模型基础上,针对能耗影响因素众多,提出了基于知识融合的船舶能耗决策支持系统的研究。以船舶能耗为对象,应用系统辨识理论,建立重点设备能耗模型库;以方法、经验和案例为基础,建立船舶能耗知识库;融合模型库、知识库、关系数据库等多源知识,建立船舶能耗评价与决策支持系统。以实现船舶航运管理、船舶操纵控制、航线设计以及船舶设计等各个过程的决策支持。