FPSO单点液滑环解体大修工艺

考虑到液滑环大修作业的特殊性,从油田管理的角度强调技术核心的重要性,以液滑环解体大修经验为基础,对液滑环的结构、解体大修的作业内容和关键的工艺要点进行分析和总结。     

弹性腔流激耦合共振及声辐射机理研究

利用Elder空腔声学模型,分析了典型空腔腔口剪切振荡和刚性壁腔体声模态的频率特征。采用模态法建立了弹性壁腔体模态声阻抗计算模型,并计算分析了腔口剪切振荡与弹性腔体耦合的归一化声辐射函数。研究表明弹性壁提供的附加压缩性,降低了空腔模态频率,增大了腔口剪切振荡与空腔模态耦合共振及强声辐射的可能性,并由试验验证了计算结果。     

FPSO单点生产滑环可靠性提升与维修技术

分析FPSO单点生产滑环密封渗漏影响因素,通过生产滑环受力分析在线监测系统,对滑环结构受力、输送介质、运行参数、密封形式的数据分析表明,滑环实际运行参数远小于设计参数,导致弹簧蓄能密封圈受力不足,是造成密封渗漏的主要原因,对滑环密封采取降压设计,有效解决了生产滑环渗漏问题.     

开孔金属腔体场强增强效应分析

为分析开孔金属腔体的场强增强效应,以正方形金属腔体为受试对象,基于数值计算软件CST建立开孔金属腔体场强增强效应计算模型,分析开孔形状、开孔尺寸、入射波极化方向等不同参数对孔缝中心及腔体中心场强增强效应的作用规律。提出使用GTEM小室进行开孔腔体电磁耦合测试新方法,搭建实验平台,验证数值计算结果的正确性,阐释场强增强效应耦合机理。结果表明:当面积相同时,和正方形、圆形孔缝相比,长方形孔缝的场强增强效应显著,长方形孔缝的长宽比越高,场强增强效应便越大;长方形孔缝的增强效应与垂直于孔缝长边的电场分量呈正比;腔体壁厚是影响场强增强效应的关键因素之一;在孔缝中心沿中轴线附近,时域场强峰值呈指数衰减;孔缝中心和腔体中心的场强增强效应耦合机理不相同。     

基于CST的金属腔体电磁环境仿真分析

本文将CST电磁仿真软件应用于金属腔体电磁兼容问题的研究中,利用该软件构建物理模型,并对金属腔体内的电磁环境进行仿真计算。仿真结果与理论计算、实测数据吻合较好,为金属腔体电磁环境的预测和评估提供了有效的依据,可以作为相关工程应用参考。     

门座起重机滑环箱温湿度监测报警系统

为解决门座起重机滑环箱内凝露高压闪络放电隐患需停机开箱检查的问题,分析了滑环箱产生凝露的原因,设计了门机滑环箱温湿度监测报警系统,实现了在不停机、不拆卸滑环箱的情况下准确判断并预警箱内凝露高压闪络放电风险,使用效果达到预期目标。     

FPSO单点滑环系统风险分析

综合国内外FPSO单点滑环设备运维记录、故障检修案例和现场实测数据等信息,从工艺流程和电气可靠性两方面分析FPSO单点滑环故障发生影响因素.考虑具体故障原因,结合事故发生的实际状况及厂家建议,给出风险评估方法,对单点系泊系统风险源及潜在影响的零件和部位进行分析,提出包含滑环系统故障梳理、失效机理分析、风险评估算法、改进...     

计算单点滑环系统失效概率的蒙特卡洛方法

建立单点滑环系统失效的动态故障树模型,利用齐次马尔科夫链表示状态空间的转移过程,并求出滑环系统失效概率精确解。提出计算单点滑环系统失效概率的蒙特卡洛方法,编制蒙特卡洛仿真程序,求解齐次马尔科夫链的数值解,结果显示,当抽样数等于5 000时,结果趋近收敛,数值解与精确解吻合良好。对于非齐次马尔科夫链,由于无法求出精确解,因此利用蒙特卡洛法求解滑环系统失效概率的数值解,数值解失效概率的变化规律与前述结果一致,验证了蒙特卡洛法的适用性。利用蒙特卡洛法求解系统停产的概率,与滑环系统失效概率进行对比发现,在相同工作时间下,系统停产概率明显小于系统失效概率。结果显示,蒙特卡洛法的收敛性好,结果精度高,且能解决马尔科夫法不能解决的问题,可以很好地应用在单点滑环系统的风险评估中。     

舰船平台腔体电磁效应成因分析

以舰船平台为研究对象,分析短波频段内腔体电磁效应形成的条件,构建腔体电磁效应产生的条件与腔体几何结构、尺寸、工作频率之间的关联性,并对腔体电磁效应进行试验验证。     

岸桥大车卷缆高压滑环箱状态监控报警系统

为保证岸桥大车卷缆高压滑环箱安全无故障运行,在滑环箱内部安装温湿度传感器和加热器,在外部安装触摸屏控制器和声光报警器,参考季节变化和港口环境等工况,采用单片机进行逻辑编程控制,可以有效地实时监控滑环箱内部状态,并对故障隐患做到及时报警和处理。     

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。