超大型气体运输船绝缘全局导热系数k的数值计算方法

根据热力学理论,针对衡量绝缘系统隔热效果的重要参数——全局导热系数k值,提出一种k值的数值计算方法,使其能够满足工程应用的精度。通过该方法快速计算得到的k值,可以作为合同设计阶段压缩机选型和成本预估的依据。     

船舶隔热结构防结露计算及优化设计

结露现象会导致绝缘的水分增加,使隔热能力急剧下降。长时间的结露会造成隔热材料的永久性损坏,同时会造成室内积水,环境潮湿。因此防结露设计是船舶舱室隔热设计的一个重要组成部分。文中对《船舶设计实用手册(舾装分册)》中的防结露计算方法进行了细化和分析,结合陆用规范的冬季保温设计对手册防结露的计算方法提出了一些修正方案,并对传统的隔热材料节点形式进行优化设计。     

预应力孔道摩阻系数的测定

本文通过对梅城大桥主桥预应力孔道摩阻系数的测定实验，合理确定k值与μ值，为孔道预应力损失与理论伸长值的计算提供正确的依据。     

沥青运输船液货舱隔热结构设计

结合沥青运输专用船的设计实例，阐明沥青运输船液货舱隔热计算、常用隔热材料的主要性能指标及隔热结构的设计方法和施工工艺；同时基于传热学的基本原理提供2种计算方法用于校核液货舱隔热材料的厚度，具有实船设计的应用意义，可供船舶工程设计人员参考。     

基于AVEVA Marine二次开发的舱室绝缘快速建模方法

为提升三维环境舱室绝缘的建模效率，提出舱室曲面绝缘及型材绝缘快速建模的二次开发方法，基于造船及海工设计系统(AVEVA Marine, AM)平台，运用可编程宏语言(PML)进行二次开发，通过拾取模型计算三维坐标点，简化重复性建模工作和操作流程，实现绝缘快速建模，方便设计人员使用。通过开发的绝缘快速建模功能与原生建模功能的对比，验证二次开发的高效性。     

基于CFD的船舶形状因子随缩尺比及弗劳德数变化规律分析

针对实船阻力预报误差较大的问题,采用CFD软件Fluent分析某大型货船形状因子的变化规律,验证计算方法的准确性,采用叠模计算确定不同缩尺比及弗劳德数时船舶形状因子,结果表明,基于Fluent计算得到的船模阻力与模型试验结果基本吻合,计算方法准确;船舶形状因子(1+k)随缩尺比减小而增加,随弗劳德数增加而增加,主要是由于摩擦阻力占比减小,k值增大。说明实验室在实船阻力换算时对于不同速度均采用同一k值是不合理的,这也是阻力预报存在较大误差的原因之一。     

蓄电池对地电压与其绝缘关系研究

针对由于个别蓄电池绝缘过低引起蓄电池组绝缘较低的故障现象，本文详细分析了蓄电池组中各点对地电压值与蓄电池组绝缘之间的关系，得出了一些重要的结论，为蓄电池组绝缘高低的判断和低绝缘蓄电池组中低绝缘单块蓄电池的快速定位提供了理论基础。     

基于Matlab低温烟气焓值和比热分析

工业生产过程中很大一部分热量都以烟气的形式白白排放掉了。为了节约能源,对烟气的物性参数进行研究是非常有必要的。本文介绍了烟气焓值、比热容的计算方法,分为多项式拟合和高斯拟合。这两种方法得出的计算方程都很精确,能够为低温余热烟气焓值和比热计算提供依据。     

柴油机燃烧室不同隔热方案的对比试验研究

给出了发动机燃烧室不同隔热方案的试验结果，以及实测和计算的燃烧室主要部件的温度场和热流量，判明了各部件的隔热作用和热负荷情况。     

LNG船MOSS型液舱蒸气绝热应用分析

介绍液化天然气运输船液货舱隔热的重要性，分析了蒸气绝热技术的原理和实际应用方案。给出了蒸气绝热数学模型、蒸发率的计算方法，再以125000m。母型船为实例进行仿真计算，计算结果与实船进行比较分析。得出MOSS型液货舱采用蒸气绝热技术后大大降低了蒸发率。最后提供了液货舱蒸气绝热系统优化设计方案。     

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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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.     

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。