应用烘烤曲线法确保电机绝缘

船舶烧组绝缘的好坏，是一项极为重要的技术质量指标。因为电机受潮后，绕组绝缘阻值降低，在电场力和各种机械应力的作用下，绕组一旦 被击穿，电机将无法继续运行。所以在电机修理过程中，尽力除去电机绕组中的水分和潮气，提高绝缘阻值是非常必要的。     

三相异步电动机绝缘故障分析与处理

为保证电机绝缘良好,避免引起不可修复的电器绝缘故障,主要讲述三相异步电动机绝缘故障的种类和特点,对电机绕组的对地绝缘击穿,相间绝缘损坏和匝间绝缘短路的故障表现形式和预防处理措施进行重点阐述.     

船用电机绝缘维护和清洗工艺探讨

本文围绕电机维修,对电机寿命、绝缘老化、绝缘测试和绝缘老化趋势预测以及船用电机绝缘清洗工艺进行了阐述和探讨,以促进电机维修技术的发展和提高     

船用消磁绕组绝缘故障诊断方法分析

消磁绕组是船用消磁系统的重要组成部分,其绝缘性能优劣决定船舶的磁隐身性能.文章通过分析船舶消磁绕组绝缘故障成因,给出绕组绝缘故障检测方法,提炼总结消磁绕组绝缘故障诊断基本流程,希望能够给相关工作人员提供指导.     

RH-2H级无溶剂浸渍漆的研制

本文介绍了一种以聚苯并噁嗪和不饱和聚酯来改性甲氧基二苯醚树脂合成了RH-2H级无溶剂浸渍漆.它具有固化温度低,固化时间短和优良的耐高温性能.适用于各类电机、绕组的沉浸绝缘处理.     

新型F级快固化无溶剂绝缘浸渍漆的研制

本文介绍了F级快固化无溶剂绝缘浸渍漆的合成及工艺性能,并对有关问题作了简单的分析.作为连续沉浸漆,试验结果表明该漆具有较长的使用期和良好的渗透性,经过该漆处理的转子和定子等具有良好的机电性能,是一种理想的节能型产品,可用于各种F级电机电器绕组的绝缘进浸渍处理.     

屏蔽泵故障数据处理与分析

分析屏蔽泵的主要故障模式,对现场数据进行适当处理,得到适于可靠性分析的故障数据.对故障数据进行经验可靠性分析、指数分布拟合、威布尔分布拟合及对数正态分布拟合,检验、比较拟合结果,得出威布尔分布是描述屏蔽泵电机绕组绝缘低故障的最佳分布,给出屏蔽泵的维修管理建议.     

定子绕组等效模型对电机热计算结果影响研究

在电机热计算中,由于定子绕组结构比较复杂,一般对其进行相应的等效简化处理,但对相关处理方法的理论支撑及对温升计算结果的影响很少进行深入研究。本文主要针对定子绕组常用的两种等效形式进行相关研究,首先对不同模型进行理论分析,再通过三维仿真计算,对不同形式的温升结果进行评估和对比,得到相关的结论,可用于指导提高电机热计算的准确度。根据仿真结果可知,绝缘材料对定子绕组的散热影响较大,将全部绕组等效为一个整体分布在槽中间,绝缘均匀分布在其周围的假设所得结果最接近实际情况。     

五相感应电动机加入三次谐波电流的仿真分析

本文运用傅里叶分析和绕组函数的方法,推导了集中整距绕组五相感应电动机的磁动势,得出集中整距绕组五相感应电机能更好地增加电机的电磁转矩、提高转矩密度.同时给出了静止坐标系(a-b-c-d-e)下考虑三次谐波电流的数学模型,通过比较绕组中加入和不加入三次谐波电流的仿真波形,得到集中整距绕组五相感应电机加入三次谐波电流能够提高转矩密度的结论.     

三相无刷同步发电机转子绕组端部绝缘结构设计

针对三相无刷同步发电机转子绕组端部存在匝间短路故障的问题，提出一种转子绕组端部绝缘结构，以一台1600kW三相无刷隐极同步发电机为例，设计了此种端部绝缘结构，详细描述了这种绝缘结构的设计方法，并应用于此台发电机中。结果表明：此转子绕组端部绝缘结构可以有效避免端部匝间绝缘短路，该方法可靠实用，为同类型发电机转子绕组端部绝缘结构设计提供借鉴和参考。     

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。     

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）.     

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。     

Catalyzing Coastal Management in Kenya and Zanzibar: Building Capacity and Commitment

Site-based projects were initiated in Chawka Bay-Paje, Zanzibar, and Nyali-Bamburi-Shanzu, Kenya, to demonstrate the benefits of an integrated coastal management (ICM) approach for addressing coastal issues such as tourism development and enhancement of resource-dependent village economies in eastern Africa. A two-year, multidonor project used three primary strategies to make rapid, but sustainable, progress toward ICM. These included using interagency government teams for ICM planning, adopting an internationally recognized framework for ICM as a project ''road map,'' and explicitly incorporating capacity-building strategies into all aspects of the project. Within two years, integrated ICM action strategies, prepared through participatory processes, were being implemented at both sites, and both teams were working to expand the scale and scope of ICM in their nation. More importantly, the project helped create committed, capable, interagency groups that continue to work together to address urgent ICM issues.