箱体零件特征模型研究

本文论述了箱体零件特征设计的基本思想,主要研究了箱体零件信息描述方法,并在箱体零件实体造型的基础上建立了箱体零件的特征模型,从而满足箱体零件CAPP系统的需要,使箱体零件CAD/CAPP/CAM实现真正的集成。     

基于STEP中性文件的船用柴油机关键零件CAD/CAPP集成方法的研究

基于STEP的CAD/CAPP信息集成,通常是开发专用产品零件的特征造型模块,该模块能按CAD/CAPP集成要求输出所需要的信息到STEP格式文件中,从而实现集成.但对引进产品,这种途径无法采用.针对上述情况,分析了引进产品的数据模型特点,提出以商品化软件输出的三维特征模型的STEP几何中性文件为数据源,提取待加工对象的几何参数数据信息,并结合匹配从三维特征模型中提取的公差等工艺制造信息,获得完整的产品零件的制造信息的方法来实施CAD/CAPP的集成.     

船舶辅机CAD/CAM集成系统

介绍了船舶辅机CAD/CAM集成系统，本系统由CAD、CAPP、CAM、技术文件采编等4个分系统组成，是在AutoCAD12.0基础上，利用AutoLISP,ADS(Borland C++)和Foxpro开发形成的。系统通过图形、DXF文件及数据库实现了各个分系统之间的集成。本系统已在企业应用，并有较好的推广价值。     

基于STEP中性文件的船用柴油机关键零件CAD／CAPP集成方法的研究

基于STEP的CAD／CAPP信息集成，通常是开发专用产品零件的特征造型模块，该模块能按CAD／CAPP集成要求输出所需要的信息到STEP格式文件中，从而实现集成。但对引进产品，这种途径无法采用。针对上述情况，分析了引进产品的数据模型特点，提出以商品化软件输出的三维特征模型的STEP几何中性文件为数据源，提取待加工对象的几何参数数据信息，并结合匹配从三维特征模型中提取的公差等工艺制造信息，获得完整的产品零件的制造信息的方法来实施CAD／CAPP的集成。     

复杂产品制造企业管理信息化平台关键技术研究

从复杂产品的生产管理特点出发,提出了与CAD/CAPP/PDM集成的以实现动态生产管理为目标的企业管理信息化平台方案,并对方案实现的技术路线及技术关键进行了阐述.     

面向并行工程的CAD/CAPP/CAM集成系统的零件特征建模技术

分析面向并行工程的CAD/CAPP/CAM系统中的零件信息模型的基本结构,建立了新的零件产品模型,解决了并行集成系统中信息交换与共享的问题.     

管形数据转换及管件信息模型表达

针对常用三维CAD软件在处理和表达管形数据方面存在的不足,本文介绍了管形数据两种描述方法,并给出了管形设计数据至加工数据的转换模型。基于导管STL模型的几何信息自动提取算法能够实现常用CAD软件设计的导管模型信息的自动提取,从导管加工CAD/CAM集成的角度建立了基于特征的导管零件信息模型,该模型能够充分表达用户对导管的加工缺陷控制要求,为实现导管加工的CAD/CAM集成提供了统一的产品数据模型。     

PDM 系统中从CAD明细表自动生成BOM表方法的研究

AutoCAD图中明细栏信息是产品数据管理(PDM)系统的重要数据来源,BOM的生成是CAD＼CAPP＼CAM＼PDM＼ERP集成系统的关键。通常在CAD图中,BOM只是一层,而在天工PDM系统中,它们是多类型、多层的。因此,我们需要从CAD图中提取并编辑这些信息。如何快捷地从明细表中提取信息并自动生成各种BOM表已经成为PDM系统重要部分。本文对此进行了相应的研究,提出了PDM系统中从CAD明细表自动生成BOM表方法的研究。利用ObjectARX开发工具,在VC 6．0的平台下,迅速快捷地把CAD的明细表中的数据读取到PDM数据库中,并根据用户的需要自动生成多类型、多层的BOM表。     

面向协同设计的CAD/CAPP/CAM系统集成

“协同设计”是近年来出现的一种产品开发设计新模式，在计算机网络环境下，它支持多个时间上分离、空间上分布，而工作又相互依赖的协作成员并行协同工作，设计过程能否真正实现协同，CAD／CAPP，CAM系统集成是其关键技术之一，文章从协同开发环境CAD／CAPP，CAM集成特点入手，分别研究探讨了CAD／CAPP，CAM集成基本方法和关键技术，构建了协同开发环境中CAD／CAPP，CAM集成系统的体系结构。     

面向船体结构CAD/FEA集成的工程数据库设计

为提高船型开发效率,针对当前设计过程的特点,尤其是CAD系统与FEA系统之间连接的不足,提出了集成数据管理技术,研究了面向船体结构CAD/FEA集成的工程数据库设计方法,实现了CAD和FEA之间的文件双向传递.     

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。