水下泥泵在耙吸式挖泥船上的应用

耙吸式挖泥船安装水下泵通常是为满足深水取砂疏浚的需要。近年来,随着水下泥泵装置技术的成熟,水下泥泵装置越来越多地应用于航道疏浚作业。相比于舱内泵,安装水下泥泵可有效提升泥泵吸入浓度、提高装舱效率,并可改善泥泵的气蚀性能、减少振动。文章从离心式泥泵的特性出发,阐释应用水下泵可提高疏浚浓度的理论基础,简要介绍了水下泥泵装置的组成特点以及在应用中可能存在的问题;最后介绍耙吸式挖泥船应用水下泥泵的实船案例,为耙吸式挖泥船疏浚系统设计提供参考。     

“通程”号超大型耙吸挖泥船开发设计

阐述了708研究所自主开发设计的国内第一艘超大型挖泥船,采用全通甲板,适用于深、远海作业;泥舱舱容达18374m3,最大挖深可达85m,为目前中国设计建造的最大舱容、最大挖深的深水疏浚工程船;疏浚设备(即:泥泵、水下泵、高压冲水泵等)采用全变频电力驱动,泥舱首次采用箱形泥门形式。     

内河中小型挖泥船采用水下泥泵的探讨

为提高吸扬式挖泥船的综合效益 ,提高泥泵的吸入浓度 ,采用不受气蚀性能制约的水下泥泵获得较大的吸入浓度 ,是目前高效疏浚的发展方向。通过几种水下泥泵驱动方式的探讨 ,分析了内河中、小型挖泥船采用水下泥泵的途径 ,以提高挖泥船的疏浚效率     

新型水下泥泵挖泥船的研制

水下泥泵可获得较大的吸入浓度 ,提高疏浚效率。介绍了水下泥泵的几种驱动方式及其效率分析 ,详细叙述了新型水下泥泵挖泥船的研制     

150/30型气动泵环保疏浚工程船设计

本文介绍一种设备先进的疏浚工程船设计.探讨在设计中为满足特殊使用要求,如清淤作业时对引起的浑浊度等而采取的多种环保措施,并着重介绍了150/30型气动泵的性能与特点,对环保型清淤船的设计具有一定的参考价值.     

6520斗轮挖泥船

由江苏省船舶设计研究所有限公司设计的6520斗轮挖泥船目前已顺利建造完毕，投入实船施工。该船装机功率达4800kW，泥泵的清水排量7000m^3／h，采用了目前达到国际先进水平的水下泥泵加舱内泥泵串联的疏浚技术，使挖泥船的疏浚浓度可达25％以上，排距可达5000m，该船的挖掘部分使用了可挖掘硬黏土的直径达4400mm的斗轮装置，特别适合硬粘土疏浚。同时，该船的设计航区为沿海拖航，沿海遮蔽海域施工，挖深为20m，可满足沿海遮蔽海域的施工要求。     

经济型1500m^3耙吸挖泥船

1500m^3耙吸挖泥船（汕头）是国内第一条采用喷水推进装置的航道疏浚工程船,采用先进的挖泥控制台布置方式,该船挖泥设备的工作效率高,使用可靠性强。     

具有首冲功能的300m^3自航耙吸挖泥船船型设计

本文介绍了一种适应于内河极浅水域疏浚的多功能作业的特种疏浚工程船及其船型设计特点。     

6 000m3/h水下泥泵型双耙式吸泥船的改装

6000m^3/h水下泥泵型双耙式吸泥船是由8 500DWT集装箱货船添置泥门、耙头、耙吸管、起吊设施及泥泵机组等设备改装而成.经实际航行,强度、干舷、稳性等参数均达到了改装设计要求.本船在疏浚作业时,耙头吸泥装舱自航至卸泥区后,开启泥门卸泥作业于沿海航区,可供沿海港湾、岛屿区域疏浚作业之用,亦可在内河干流中进行疏浚作业.     

新一代大型绞吸挖泥船

由江苏省船舶设计研究所有限公司为营口港一疏浚工程有限公司设计的2条大型绞吸挖泥船目前在营口港一船厂建造完毕,已投入营口港鲅鱼圈工地施工。该船装机功率达9200kW,设1台目前达到国际先进水平的电轴系统驱动水下泥泵,2台舱内泥泵,根据工程疏浚要求可实现二泵串联,     

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。