面向船舶制造的柔性胎架调节设计

针对船用胎架尚未实现与现有造船集成制造系统数据的自动化对接和自动调节的问题,在传统胎架的基础上进行柔性胎架设计。运用图形学中常用的非均匀B样条,根据船舶型值表,利用MATLAB仿真重构船舶曲面外板,反算控制顶点,估算曲面曲率,将初始化船舶外板拟合曲面数据导入数据处理系统,换算为每个胎架的坐标,结合胎架实际受力情况调整胎架位置和高度,可提高船舶胎架的利用率、造船效率、分段装配和焊接精度。     

CCS万吨级船舶船体建造中多种新型胎架应用及探讨

阐述了胎架在中小型船舶建造中对于严格控制船体线型的重要作用,以及胎架在制造中必须具有足够的强度及钢度才能满足使用要求,对保证船体分段建造质量和精度控制起到了指导作用.     

基于模糊PID控制的船用胎架高度联控方法研究

胎架作为船舶分段建造变形控制的重要工装,但不具有联合调控与自适应控制能力,无法快速响应分段建造质量问题,为此本文提出基于模糊PID控制的船用胎架高度联控方法.首先,基于船舶分段拟合曲面建立胎架高度补偿模型,为胎架的自适应调控提供依据;其次,基于分段变形范围和受压载荷构建胎架间关联机制,达到胎架系统的动态联调;然后,利用模糊PID控制算法实现胎架高度的自适应调控,达到抑制分段外板变形的目的;最后,通过智能胎架系统对本方法进行验证分析,并与常规PID对比分析,表明本文方法具有较好的稳定性.     

面向船舶分段胎架管理的物联网构建及应用

为解决船舶分段建造过程中工艺数据实时采集与应用方面的问题,以胎架工艺装备为载体,构建一套面向船舶分段胎架管理的物联网系统。该系统由数据获取层、数据传输层和数据管理层构成,其中:数据获取层由传感器设备实现数据采集;数据传输层由ZigBee无线网络保证采集的数据实时传输;数据管理层由开发的分段建造工艺系统支撑,为胎架管理提供数据基础。试验结果表明:该系统能有效采集、传输、分析和存储船舶分段建造过程中的工艺数据,并通过系统软件对胎架进行远程控制。相比传统的分段建造模式,该方法能极大地提高工艺数据采集与胎架管理水平,为后续船舶智能制造模式的发展提供参考。     

管式活动胎架在广州造船厂的应用

管式活动胎架可以代替传统的模板胎架,特别对建造万吨级以上的船舶,全船85％以上的分段可在管式活动胎架上建造。本文介绍广州造船厂在推广应用管式活动胎架过程中所采取的措施和所取得的成绩。     

内河小型船舶简易胎架建造

为了保证船体外形与设计理论线型吻合,在船体分段建造及整体建造时,都必须按照设计线型设计制造出分段及总段建造胎架。复杂完整的胎架实际上是整个船体的外模,所以用在制造胎架上的工时及材料甚多,势必增加建造成本,影响生产进度。据有关资料统计,复杂胎架所耗材料占船体总材料的30%以上,计划工时占26%左右,建造成本占船体总成本的15.4%。因此胎架形式的选择,是船体建造中需要着重考虑的问题。为了使胎架既保证船舶     

新型数控胎架模块化柔性装置

在前期研制的新型数控活络头通用胎架基础上,针对该胎架在大曲度曲面分段制造时行程及转场便捷性不足的问题,提出一种模块化柔性装置。该装置由连接机构、框架平台、支撑调节模块和移动机构组成,在不改变原数控活络头胎架支柱规格的前提下,可提高胎架的调节范围,而且其通用性和灵活性更佳,适合各种曲面分段的建造。     

船体装配胎架的选择

本文是作者在苏学习期间收集资料而写的。文中论述了船体装配胎架选择的有关问题,主要包括二个方面:(1)决定胎架的万能程度;(2)选用胎架的结构型式。此外,在文中还研究了批量船舶的建造计划与胎架万能程度对工段生产率的影响;并特别注意到分段划分对船体装配胎架选择的影响问题。本文对现有一些万能程度较高的胎架作了简述,并提供了胎架选择的有关资料。     

浅谈船体双斜切分段建造的精度控制方法

双斜切分段一直是船体建造精度控制的难点,其曲型外板曲度变化较大,胎架布置方式与船体坐标成一个空间上的夹角,给精度测量和数据分析造成了困难。通过分析其建造难点,提出了提高胎架制作精度的方法。结合软件操作,完善施工图纸信息,提出部件快速定位的方法。制作了简易测量工装,提出结构角度的测量方法。通过实际施工证明,以上方法的实施可以快速有效的提高双斜切分段的建造精度。     

船舶导流管制造与焊接工艺研究

对船舶导流管的结构与形式以及其功效进行了阐述。结合实际施工建造中的实例,对3530kW(4800HP)拖轮的导流管的胎架制作、导流管焊接、定位安装等工艺措施和方法进行研究和分析。运用该工艺,使导流管的建造精度得到有效控制,并取得良好的效果,为同类型船舶提供借鉴。     

33rd International Conference on Ocean,Offshore and Arctic Engineering （OMAE2014）

正San Francisco,California,June 8-13,2014.OMAE 2014 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to:·meet and present advances in technology and its scientific support;·to exchange ideas and experiences whilst promoting technological progress and its application in industry·to promote international cooperation in ocean,offshore and arctic engineering.In line with the tradition of excellence of previous OMAE conferences,more than 900 technical papers are planned for presentation.Outreach for Engineers Specialty Forum This Specialty Forum is designed for students and professionals who may not be familiar with the Ocean and Offshore industry,as well as those who have just recently specialized in this field.     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

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联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

Recent progress on wave induced loading measurements in warships

Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.     

The 11th International Conference on Hydrodynamics (ICHD 2014)

正19–24 October 2014 SingaporeCONFERENCE THEMES The overall aim of the ICHD Conference is to provide a forum for participants from around the world to review,discuss and present the latest developments in the broad discipline of hydrodynamics and fluid mechanics.The first International Conference on Hydrodynamics(ICHD)was initiated in 1994 in Wuxi,China.Since then,9 more ICHD conferences were held subsequently in Hong Kong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,Shanghai and St Petersburg.Evidently the ICHD conference has become an important event among academics,researchers,engineers and operators,working in the fields closely related to the science and technology of hydrodynamics.The 11th ICHD will be held in Singapore in 2014.     

第十二届深水操作会议和展览会(英文)

正November 4-6,2014Moody Gardens HotelConvention Center/Galveston,TX The Deepwater Operations Conference and Exhibition is celebrating its 12th anniversary this year.This growing event will continue the tradition of excellence in addressing operational challenges involved in developing deepwater resources.We will return to the Moody Gardens Hotel and Convention Center on November 5-7,2014 in Galveston,Texas.     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.     

某海港码头的撞损修复

依据码头撞击受损区域调查检测结果,对受损构件提出合理的修复方案,为码头的安全运行提供保障。