船体总段吊带吊装新工艺研究与应用

船舶的总段建造法在提高总段预舾装率和建造质量、缩短船台(坞)周期方面具有突出优势。目前总段有大型化的趋向,但大型模块化总段建造并不完全依赖于起吊能力的提高,可用先进工艺技术来替代大型基础设施的巨大投入。介绍了一种采用新型材质(合成纤维材料)组成的圆形吊带吊装大型薄壁船体总段替代甲板吊环吊装和钢梁托架吊装方法,为确保吊带吊装安全可靠,做了大量的技术准备工作,对方案进行论证分析、有限元计算,建立科学的理论依据,总段吊装的顺利实施,提高了船体总段的预舾装率,对实现造船模块化生产、壳舾涂的一体化有着十分重要的意义。     

5300TEU集装箱船上层建筑总段吊装强度分析

通过MSC.Nastran软件对5300TEU集装箱船上层建筑PM61C总段进行吊装强度有限元分析,分析了总段在吊装前和吊装时的结构响应。通过计算得到总段由吊装引起的结构响应,并计算分析吊耳的结构响应,保证上层建筑总段吊装过程顺利进行。     

基于TSV-BLS的虚拟上层建筑总段吊装分析

上层建筑总段吊装是船舶建造过程中的重要环节,直接影响船厂的建造周期。为保证吊装顺利进行,通常应计算起吊过程中结构变形和应力变化是否满足要求。文章以38 500 t散货船上层建筑总段整吊为例,应用TSV-BLS软件进行建模,模拟其动态起吊过程,分析结构应变和应力,根据计算结果进行优化处理,提高吊装安全系数,保证总段吊装的顺利进行。     

船舶建造总段吊装方案分析

本文以中机型船舶机舱分段为例,对船舶建造过程中总段吊装方案进行分析,并通过有限元计算对吊装过程中的应力应变进行了研究。通过本文分析,对总段吊装方案的策划进行了介绍,为船舶建造过程中的总段吊装提供有利的借鉴意义。     

基于有限元方法的大型邮轮薄板总段吊装方案设计

考虑到大型邮轮薄板总段使用大量薄板结构,而薄板结构在吊装过程中极易产生变形,在对总段吊装进行方案设计时,利用MSC Patran/Nastran对薄板总段吊装方案进行有限元计算,确定合理的吊装及临时加强方案。     

大型船舶结构吊装数值模拟研究

提出描述吊装所引起变形程度的物理量:变形量和变形率,并阐述这2个物理量的概念及运用实例。运用数值仿真方法对18万t散货船的舷侧总段及机舱大总段的吊装过程进行模拟,参照结构吊装安全准则优化舷侧总段吊装加强,将优化成果运用到实际生产中,取消原来的圆管加强,减少安装、拆除的工程量,提高生产效率;在有限元计算的基础上,模拟不同工况下机舱大总段整体结构的受力情况,并对计算结果进行分析。结果表明:机舱大总段结构在起吊上升及移位2个阶段的应力和变形超出了安全范围,需采取应对手段。对机舱总段吊装进行数值模拟有利于实现总段大型化、保证吊装的安全性;同时,可提高总段的完整性,使许多坞内工程陆地化,为缩短船坞周期提供理论依据。     

大型上建总段双车联吊工艺研究

针对某9 400 TEU集装箱船大型上建总段因结构尺寸和质量超过单台龙门起重机的起吊极限这一问题,根据上建总段的结构特点,结合船厂设备设施的条件,提出双车联吊工艺方案。采用船体吊装模拟分析软件对上建总段吊装过程进行模拟仿真,计算双车联吊工艺条件下船体结构的变形和受力情况,完成吊装方案的校验,从而保证该上建总段的顺利吊装。     

中型邮轮薄板总段吊装强度和变形分析

本文针对邮轮上建薄板总段的变形可能会损坏内部结构或导致无法吊装合拢等问题,以某中型邮轮平直薄板总段为例,设计2种吊装方案,探讨起吊设备对其吊运整个过程中影响建造效率的因素,利用有限元分析方法,计算薄板总段在不同工况下的强度、变形,并对发生超大应力的总段提出临时加强方案。结果表明,加强后的2种吊装方案均适用于薄板总段结构强度弱的特点,满足船级社吊装规范要求,从而使得邮轮薄板总段的吊装作业更加便捷、高效。     

基于TSV-BLS软件客滚船机舱总段整体吊装方案分析

考虑到客滚船机舱总段结构的复杂性,为确保吊装安全,使用TSV-BLS软件构建总段有限元模型,计算整体吊装时总段的应力和变形、钢丝绳的拉力等,并对吊装方案的可行性进行评估。实船顺利吊装证明该吊装方案设计合理,对于其他船舶机舱总段的吊装具有一定的指导和借鉴。     

基于BLS的载重量38000t散货船尾部总段整体吊装优化设计

泰州口岸船舶有限公司采用整体吊装工艺对散货船尾部总段进行吊装,考虑其结构的复杂性,应用有限元法计算整体吊装时的结构强度。采用BLS软件构建船体有限元模型,计算整体吊装时的结构响应,校核结构薄弱部位,有针对性地提出加强方案并对方案的可行性进行评估。实船尾部总段的顺利吊装表明该整体吊装工艺设计合理,对后续船体尾部总段吊装具有指导和借鉴意义。     

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。