长江口深水航道挖泥船在AIS输入与使用中存在的问题和建议

由于长江口深水航道向外延伸或者大风浪期间引航接送作业区向里移到D18灯标附近,因此疏浚工程中挖泥船的AIS是否正确输入显得比以往更重要。通过AIS接收挖泥船广播的信息,发现大多数挖泥船在AIS输入、使用中存在或多或少的问题。文中提出了挖泥船在AIS中如何正确输入与使用的建议,以期能对管理和使用挖泥船的相关人员有所帮助。     

500m^3／h绞吸式挖泥船电气系统改进设计

引进的绞吸式挖泥船不完全适合黑龙江水系统的使用要求，在首次自动设计，建造该型挖泥船时进行了改进。本文介绍了其主要性能及机械电气系统设计中采取的有效措施。     

基于卡尔曼滤波的挖泥船电网谐波监测系统的研究

高次谐波造成挖泥船疏浚生产效率低下、能耗增加、环境污染恶化,为了疏浚船舶的交货质量及正常使用,必须先对挖泥船电网谐波进行监测,再对其进行抑制。本文针对挖泥船电网谐波监测的技术问题,结合挖泥船特定的工况海况,采用卡尔曼滤波(Kalman Filtering,KF)算法,构建挖泥船电网谐波监测系统,具有使用效率高、监测精度高、成本低且适用范围较广等特点。     

绞吸挖泥船计算机辅助疏浚决策系统

介绍了自主开发研制的绞吸挖泥船计算机辅助疏浚决策系统的主要功能。该系统针对土质变化,运用多项高新技术,监测绞吸挖泥船的工作状态,建立施工参数与挖掘土质及产量的相互关系,通过分析、优化、辅助决策与提示,指导疏浚操作人员对疏浚参数的优化改进,从而提高绞吸挖泥船的生产效率。该系统已通过天津市科技成果鉴定和中港集团验收,并在集团多条绞吸船上推广使用,效果良好。     

1 100kW刀轮挖泥船

刀轮式挖泥船是在双斗轮挖泥船的基础上改进设计的一种新型挖泥船。比双斗轮挖泥船挖掘效率更高、挖掘高硬度粘土时能力更强。本文比较系统地介绍了该船的研制背景、结构形式、动力配备等。     

中山造船产值规模迈向500亿

6月24日至27日,文冲船厂为天津航道局建造的85米挖深自航耙吸式挖泥船“通程”轮仅用三天时间就完成各项航行和疏浚功能试验,刷新了公司大型首制挖泥船试航周期记录。“通程”轮泥舱舱容为18,000立方米,是文冲船厂迄今建造的最大挖泥船。在试航过程中,该船首次使用6,600V中压电动泥泵进行挖泥,     

电液比例技术在挖泥船系统控制中的应用

介绍电液比例技术及其在挖泥船液压系统中的应用 ,论述了传统挖泥船通断液压系统控制性能和控制方式的落后。比较了使用电液比例技术前后在性能、可操作性、经济性等方面的优劣 ,为挖泥船的自动、半自动化创造了条件     

大型斗轮挖泥船电气仪表自动化设计简介

治理江河湖海需要高性能、高效率、低能耗、自动化、环保型的挖泥船。本文对使用于长江三峡工程的1600kW斗轮挖泥船和用于水利部“百船工程”之一的350m^3/h斗轮挖泥船的电气和仪表、自动化的设计作一简要介绍。     

大型耙吸挖泥船岩石疏浚方案优化

分析大型耙吸挖泥船开挖岩石的难点。 结合耙吸挖泥船设备性能特点,从施工工艺、疏浚机具设备选型及适应性改造等方面,提出耙吸挖泥船挖掘岩石的优化措施。通过实际工程应用、改进和提炼,形成较成熟的方案,取得了较好的使用效果。     

耙吸式挖泥船液压系统国产化之路

近年来，随着可持续发展环境保护，航道清淤、疏浚、整治、港口建设、水利治理等项目工程的启动，国内市场对耙吸式挖泥船的需求越来越大。我国先后从荷兰购进大型耙吸式挖泥船数艘。同时国内也改装了数艘大型耙吸式挖泥船，并制造了一批1500m^3的耙吸式挖泥船。这些举措不仅极大地提高了我国耙吸式挖泥船的拥有量，同时也通过引进、吸收、消化，极大地提升了我国设计、建造耙吸式挖泥船的能力。由于国内设计建造或改造的挖泥船与国外购进的挖泥船在性价比上有着明显的优势，同时在使用及维护成本上的优越性也决定着今后国内设计、国内建造的必然趋势。     

The use of hydrogen as a fuel for inland waterway units

Escalating apprehension about the harmful effects of widespread use of conventional fossil fuels in the marine field and in internal combustion engines in general, has led to a vast amount of efforts and the directing of large capital investment towards research and development of sustainable alternative energy sources. One of the most promising and abundant of these sources is hydrogen. Firstly, the use of current fossil fuels is. discussed focusing on the emissions and economic sides to emphasize the need for a new, cleaner and renewable fuel with particular reference to hydrogen as a suitable possible alternative. Hydrogen properties, production and storage methods are then reviewed along with its suitability from the economical point of view. Finally, a cost analysis for the use of hydrogen in internal combustion engines is carried out to illustrate the benefits of its use as a replacement for diesel. The outcome of this cost analysis shows that 98% of the capital expenditure is consumed by the equipment, and 68.3% of the total cost of the equipment is spent on the solar photovoltaic cells. The hydrogen plant is classified as a large investment project because of its high initial cost which is about 1 billion US$; but this is justified because hydrogen is produced in a totally green way. When hydrogen is used as a fuel, no harmful emissions are obtained.     

使用氢气作为内陆水路燃料调查研究(英文)

Escalating apprehension about the harmful effects of widespread use of conventional fossil fuels in the marine field and in internal combustion engines in general, has led to a vast amount of efforts and the directing of large capital investment towards research and development of sustainable alternative energy sources. One of the most promising and abundant of these sources is hydrogen. Firstly, the use of current fossil fuels is discussed focusing on the emissions and economic sides to emphasize the need for a new, cleaner and renewable fuel with particular reference to hydrogen as a suitable possible alternative. Hydrogen properties, production and storage methods are then reviewed along with its suitability from the economical point of view. Finally, a cost analysis for the use of hydrogen in internal combustion engines is carried out to illustrate the benefits of its use as a replacement for diesel. The outcome of this cost analysis shows that 98% of the capital expenditure is consumed by the equipment, and 68.3% of the total cost of the equipment is spent on the solar photovoltaic cells. The hydrogen plant is classified as a large investment project because of its high initial cost which is about 1 billion US$; but this is justified because hydrogen is produced in a totally green way. When hydrogen is used as a fuel, no harmful emissions are obtained.     

Fishermen’s training and use of safety equipment: A case-study of the Artisanal Fleet of Andalusia

This article is intended as a contribution to safety and health in small-scale/artisanal fishing in the autonomous region of Andalusia, Spain. Training is examined as a key element for reducing risks and therefore the serious number of accidents that occur in the fishery work sector as one of those that is statistically reflected as such and discusses the international and Spanish regulations. The case study focuses on the use of safety equipment in this fishing fleet and highlights the improper use of safety equipment and lack of a health and safety culture. Training is examined as a key element in promoting health and safety awareness in this group.     

谈海事业务档案的对外利用

归纳海事业务档案范围，总结利用人的种类、利用的形式及现有的相关法律依据，分析海事业务档案利用现状、利用尺度、利用人条件，建议建立并完善内部管理制度。     

Potential and benefits of electronic charts to Maritime Administrations

Electronic charts have come more and more into use for marine navigation. If complying with the relevant international standards they are an accepted substitute to the mandatory carriage of paper nautical charts. However, the potential of such official, high-quality electronic chart data goes far beyond the use for navigation. In order to show its potential, the basic concepts and features of official electronic charts as a marine geographic information data base are explained and the relation of Hydrographic Offices responsible for their production, to Maritime Administrations is described. The data standard to be followed for electronic charts opens the use of the data for a wide range of possible applications. If efficiently organised, Maritime Administrations can be provided with a powerful, versatile database establishing a single geographic reference data base for e.g. Vessel Traffic Services, for Search and Rescue as well as for various applications in Coastal Zone Management including coastal protection and marine environmental protection. Ultimately, digital marine geographic information will become part of the evolving global spatial data infrastructure.     

Industrial water dependency: The BCDC experience

The Bay Conservation and Development Commission (BCDC), has designated a number of shoreline sites around San Francisco Bay for exclusive use of water‐related industry. This is intended both to reduce future needs for Bay fill, and to reserve those waterfront sites needed for long‐term industrial growth. The Commission currently defines water‐related industries as those “requiring”; a shoreline site for water transportation. The Commission is now considering the use of an economic criterion for identifying water dependency. This involves comparisons of the uniquely water‐related benefits and costs to the firm to locate on the shoreline, as opposed to its location at an inland site. By limiting use of deepwater sites to those industries that are significantly water‐dependent under this criterion, long‐term economic efficiency is served, and the need for future Bay fill for industrial growth is reduced. The data and analysis required to implement an economic water‐dependency criterion do not appear to be a barrier to use of such a test in the regulatory process. Whereas water dependency is an important concern to BCDC, other factors, including environmental constraints, must also be weighed when evaluating industrial projects.     

应用Ansys的DDAM方法进行舰船设备的抗冲击计算

用Ansys的DDAM方法进行舰船设备的抗冲击计算时,要求建立的有限元模型的质量单位为磅,长度单位为英寸。技术人员在进行有限元建模时单位一般采用米-千克-秒,所以必须对Ansys程序中各项参数进行单位转换,才能获得正确的仿真计算结果。本文从Ansys在进行抗冲击计算时的各个计算公式出发,分析各个参数的意义以及相互关系,导出了设计冲击谱值的转化关系,利用Ansys的相关命令编制相应的计算程序,方便地完成DDAM的计算工作,对舰船设备的抗冲击计算有一定指导意义。     

抗风缆对新疆赛桥静风稳定性控制的有效性研究

新疆赛吾达格尔大桥采用45°斜拉式抗风缆,用简支弹性梁的Rayleigh近似法计算基频;在不同风速下用有限元计算抗风缆施加前后主梁跨中横、竖向位移以及扭转角度,考察抗风缆对大跨悬索桥静风稳定性控制的有效性。结果表明：抗风缆能显著提高桥梁结构的固有频率,产生十分有效的抗风效果。     

连云港某无围堰通航构筑物设计要点

为保障沿海海湾区域游艇通航、水体交换需要等，常需新建船闸或设置通航孔等通航构筑物。随着近年海洋生态环保力度加大，用海指标越加紧张，传统的大围堰干地施工工艺越来越不能适应新的形势。结合连云港连云新城基础工程，针对用海受限、自然条件恶劣、地质条件差以及工期紧张等复杂条件，开展结构选型、止水防渗等关键技术研究，提出装配式预制闸室设计技术、装配式翼墙设计技术等，较好地解决了相关的技术难题，可为相关工程的设计和施工提供借鉴。     

PHC大直径管桩在华南地区的应用效果

结合3个在华南区域不同地区以及不同地质情况的项目,对PHC大直径管桩的应用进行介绍,探讨PHC大直径管桩在不同地质情况下的沉桩效果,为PHC大直径管桩在相同区域或类似地质的应用提供参考.