柴油机固定件装配工艺有限元分析

对某船用柴油机主要固定件进行了三维实体建模和网格划分,采用有限元分析技术,以Hyper Works为平台进行了机体装配工艺有限元分析。研究了4种贯穿螺栓装配工艺下机座、机架以及气缸的力学性能,提出了最佳装配方案,并进行了位移测试试验。试验结果表明:所建立的有限元分析模型可靠、准确,使用的分析技术可以对船用柴油机固定件装配工艺提供理论指导。     

锁相技术在船用雷达中的应用

介绍了锁相技术的基本原理、锁相环的组成,以及应用锁相技术的船用雷达频率源的设计方案及其相位噪声实际测试结果。该设计方案已通过技术评审,并已投入实际应用与生产中。     

船用发电机组自动化负荷测试系统的研制

本文主要介绍了广船国际与华南理工大学最新研制的船用发电机组自动化负荷测试系统。该测试系统改善了传统船用发电机组的测试手段,提高了测试效率,实现了发电机组试验负荷的自动调节和发电机组试验数据的自动记录。     

简讯

中国船舶工业总公司成立船用非金属材料技术检测中心据有关方面介绍,为贯彻执行国家技术监督的方针、政策,适应中国船舶工业总公司各类产品技术检测的需要;为开展并做好船用非金属材料及涂料的公证性检测、监督、服务工作,促进科研、试验、生产和外贸的发展,中国船舶工业总公司于1988年10月决定在中船总公司船舶工艺研究所建立中国船舶工业总公司船用非金属材料技术检测中心。经半年多积极筹备,该中心已于今年6月16日宣告正式成立。检测中心建有力学性能、物理化学分析、     

一种新型船用生活垃圾处理装置设计

文章介绍了目前常见的船用生活垃圾处理技术,并指出了这些处理技术存在的缺点或不足。针对这些缺点或不足,从船用生活垃圾处理装置设计要求出发,以AutoCAD2017为平台,设计出了一种新型船用生活垃圾处理装置,说明了其工作原理和主要组成零部件,最后从技术、结构、操作性等方面对该装置进行了可行性分析。结果表明,该装置具有现实可行性。     

船用柴油机研发与CAE应用

本文对国内外船用柴油机行业研发的现状进行了比较和分析。作为船用柴油机现代设计手段和核心研发应用技术，CAE将是提高船用柴油机设计与研发能力的一个重要因素．也是改进船用柴油机设计手段很重要的一个环节。国内以生产引进机为主的低速大功率船用柴油机制造企业正在考虑建立CAE仿真平台，利用CAE仿真的高效、全面、低成本等特点，通过CAE仿真技术的推广及应用。帮助企业解决在新机型开发和生产中所遇到的技术难题．提高柴油机的制造质量和生产数量，以满足我国船舶工业快速发展对船用低速大功率柴油机的需求。文章对CAE仿真技术应用和研究可给船用低速大功率制造企业带来的收获及在行业内的推广应用前景作了展望。     

船舶关键部件静强度及疲劳寿命的有限元分析方法

船用构件力学性能测试平台可极大提高船舶关键部件的生产工艺,同时可以对船舶关键部件进行疲劳强度与寿命分析,从而可以及早发现并提升薄弱环节,降低船舶关键部件的制造成本。本文将通过有限元软件和疲劳软件分析船舶关键部件的疲劳强度与寿命,旨在为以后的设计和制造提供参考。     

船用自动化控制系统软件测试的设计研究

传统人工测试方法在不同设备故障下,测试精准度较低,针对该问题,提出一种船用自动化控制系统软件测试的设计方法。从船舶实际需求出发,分析船用软件测试系统结构,通过程序标识、接口装置、自测试程序、启动安全测试、注意和警告、故障检测、安全性考虑,完成测试程序设计。采用一次连接多次测量技术,在用户组建系统基础上,按照相应程序,对所规定的全部参数测量,完成所有故障测试。由实验结果可知,该软件在不同设备故障下,测试精准度最高可达到95%,为船舶正常通信奠定基础。     

一种船用传感器集成平台的设计

介绍基于ARM7微控制器,设计船用传感器集成平台的硬件软件实现方法,给出了以S3C44B0X芯片为核心的硬件设计原理图,详细阐述了S3C44B0X CPU核心电路、模拟信号测量电路、周期信号测量电路以及系统测控软件的设计方法.ARM船用传感器集成平台,利用其强大的测量控制能力及数据计算处理能力,可以配接机舱内十多种模拟式和数字式传感器,应用于中小型船舶机舱集中监视与报警系统中.     

三维激光扫描技术在船用水火弯板测量中的应用

介绍基于三维激光扫描技术的船用水火弯板测试原理和测试过程。利用高斯曲率作为评价依据,通过逐一对比船用外板肋骨线实测数据和设计数据来计算并评价曲面成形度,进而完成对水火弯板的成形检测。通过试验证明该技术方法能有效完成水火弯板成形检测和评价,并能辅助控制成形误差。     

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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第34届海洋、离岸及极地工程国际会议(英文)

正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 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;     

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。     

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）.     

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.     

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。     

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.     

开放式数据挖掘系统模型

目前国内已经出现了少量的数据挖掘相关产品。国内数据挖掘软件无论从数量还是质量上比较，都与国外软件存在着较大的差距。随着数据仓库技术的普及，数据挖掘应用的需求越来越强烈，如何缩短这种差距，研发数据挖掘软件产品成为国内业界的一个重要问题。通过引用目前国际通用数据挖掘标准技术来构建开放式的数据挖掘系统模型，该系统模型从可扩展性、可重用性、易用性等方面得到了加强。