机舱单元预舾装的设计和应用

1982年,沪东造船厂在36000吨散货船“东星”号的建造中,广泛应用单元组装和分段预装新工艺,取得了很好的效益。该船管子预装数量占全船管子总根数的75%以上,在船台装配时,当机舱底部分段吊上船台后,重约25吨的UM01号大型设备单元随即吊上船台,其它各类单元也与有关的船体分段相继交错吊上船台,改变了过去造船生产中轮机工程落后于船体建造进度的被动局面。本文结合该船的建造情况,叙述机舱单元组装的设计和应用。     

传感节点和以太网在船舶分段建造管理中的应用

为了解决船舶分段建造过程中的信息采集和核对问题,本文提出一种基于传感节点和以太网技术的船舶分段建造管理系统,实现对船舶分段建造的集成化管理。设计环境信息采集传感节点和材料工艺信息采集节点,分析采集节点的结构,并对材料工艺信息采集节点的天线设计进行了实验分析。阐述船舶分段建造管理系统的整体架构,并对应用服务层、数据层以及感知层功能进行详细分析,系统有效提升了船舶分段建造效率,为船舶制造集成化管理提供支持。     

LNG船船体详细设计

对LNG船的船体设计和建造过程进行研究,探讨适合大型船厂的详细设计改进模式,通过分段划分设计、分段建造方法和船型特殊要求等方面总结详细设计经验,使详细设计符合船厂建造模式,对同类型船设计具有积极的指导意义。     

多用途船舷部分段制造工艺研究

随着造船技术的进步,船台(船坞)的建造周期不断缩短,因此船体建造对中间产品――分段的精度要求越来越高。本文对20000DWT多用途重吊船的舷部分段建造工艺进行研究,并对分段完工后主要精度指标的实际测量数据进行分析,证实该工艺满足精度要求,利于后续的搭载定位精度控制,为其它双壳多用途散货船[1]的带舱口围舷部分段施工工艺提供了技术指导。     

球鼻首分段施工方法的分析

在各种船型球鼻首分段建造方法的基础上,针对2 300车位汽车滚装船的球鼻首分段的结构特点,提出一种全新的球鼻首分段的建造方法。通过与传统建造方法的对比分析,发现以中纵壁板为胎建造此类球鼻首分段的建造方法,建造周期短,安全性高。     

115000吨级穿梭油船艉段吊装方案的设计与论证

大连造船厂为挪威克纳森航运公司建造的115000吨级穿梭油船的重达410t的艉段,实现了整体建造与空中翻身,创国内船厂大分段翻身的最高纪录. 本文对这410 t重的艉段整体建造方法与翻身吊运方案的可能性作了全面细致的论证,并对实施方案的结构设计方法进行了粗浅介绍.     

9000HP绿色环保型海洋平台供应船分段划分设计

简要叙述国家建造此海洋平台供应船的目的以及其本身特点,并根据其特点,在建造9 000 HP海洋平台供应船类型船应如何进行分段划分设计,以求得到在技术和经济最为合理的分段划分方案,达到缩短船舶建造周期,降低船舶建造成本,保障船舶建造质量的目的。     

门型分段和L型分段的选择

分段划分是船体建造的主要一环。分段划分时,将舷侧连同各层甲板作为一个整体,设计成门型或L型的分段,既方便了分段本身的建造、吊运、翻身,也给分段的船台装配定位带来极大的便利,同时可使预舾装量加大。本文从分段刚性、结构形式,工厂起重条件等方面介绍了选择分段划分成门型分段或L型分段的一些经验材料。     

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     

船舶分段吊装的方案设计及有限元分析

在船舶的分段建造中,吊装是分段建造完后进行合拢的关键环节。以某型船船艏分段为对象,通过对结构特征的分析,制定相应的吊装方案,利用有限元进行模拟计算,分析验证了方案的可行性。在分析验证过程中总结了吊装设计中所要注意的事项,对船舶分段的吊装设计可以起到参考作用。     

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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第34届海洋、离岸及极地工程国际会议(英文)

正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 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;     

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。     

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）.     

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.     

桥梁防撞设施物理模型试验

物理模型试验是预报防撞设施所受撞击力及优化设计方案的主要方法之一。结合杭州湾大桥柔性防撞设施及东海大桥独立式防撞体设计方案,阐述了船—防撞体撞击试验的基本原理、方法、试验方案及相关试验结果。提出了柔性防撞系统的优化方案。试验结果表明,该方案经济有效,可供预报类似桥梁防撞设施撞击力时参考。     

印尼某电厂码头水工建筑物设计

印尼某电厂项目码头水工建筑物包括码头、防波堤和护岸等主要组成部分。在该项目水工建筑物的设计过程中,综合考虑当地的自然条件、施工能力和材料来源等因素,不断优化结构选型和结构断面。根据不同使用要求,护岸分别采用直立式和斜坡式2种结构型式,推荐的设计方案节省投资、施工方便,可供同类工程设计参考。     

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.     

开放式数据挖掘系统模型

目前国内已经出现了少量的数据挖掘相关产品。国内数据挖掘软件无论从数量还是质量上比较，都与国外软件存在着较大的差距。随着数据仓库技术的普及，数据挖掘应用的需求越来越强烈，如何缩短这种差距，研发数据挖掘软件产品成为国内业界的一个重要问题。通过引用目前国际通用数据挖掘标准技术来构建开放式的数据挖掘系统模型，该系统模型从可扩展性、可重用性、易用性等方面得到了加强。