无人驾驶挖掘机解决抛石安全问题研究

随着沿江经济和长江水运快速发展,航道整治工程越来越突显重要性。现在最经济最有效的抛石方式是利用平板驳装载石头,运至抛投区域,由定位船来定位,挖掘机上平板驳操作抛投。由于平板驳上空间小,船体易摇晃,石头存在滚落滑动等均易导致挖掘机掉入江中,给挖掘机驾驶员带来极大的安全隐患。文中从解决抛石安全隐患的角度出发,在分析国内外抛石工程发展现状及趋势的基础上,提出无人驾驶挖掘机的设想,从项目内容、技术路线等方面对无人驾驶挖掘机解决抛石安全问题进行了研究。     

深水抛石整平船的建造与应用

介绍了自主研发的深水抛石整平船的建造与应用、整平机技术特性、基床整平工艺、基床整平的精度和效率等,实现了深水条件下基床施工以抛石、整平、检测为一体的机械化作业.该船采集的试验数据及经验可为后续研发工作提供借鉴.     

加长臂反铲挖掘机在深水急流滩险水下清碴施工的优势

以红水河十五滩航道水下炸礁清碴试验施工为例,介绍加长臂反铲挖掘机在深水、急流滩险水下清碴的优势及体会。     

抛石整平船制造技术研究

抛石整平船为短周期项目,工期紧任务重,结构复杂,制作难度大,加工精度高.通过对其制造特点分析,介绍了船体制作工艺、抬升主结构制作工艺和桩腿制作工艺,对同类自升式升降平台的制造具有一定的借鉴作用.     

抛石整平船爬升机构磨损后弯曲及疲劳损伤度研究

论文针对服役于港珠澳大桥修建工程的某型抛石整平船的非标、超大模数、重载低周循环作用的齿轮齿条传动爬升机构,基于弯曲强度理论、实测数据、疲劳理论规范及仿真计算软件,在国内外海洋工程领域首次开展了磨损后的齿轮齿条结构弯曲强度及疲劳损伤度研究,其研究成果对于类似结构的全寿命周期管理具有一定的参考价值。     

自航抛石船"三航抛4"的技术改造

通过对"三航抛4"机械设备的技术改造,提高了设备的完好率和生产效率,完好率由85%提高至99%,航速提至9.41 kn,解决了船机设备与施工生产日益突显的矛盾。文章就三航抛4的技术改造进行总结,并提出改造要点和注意事项。     

沉管隧道基床抛石整平船自动移船控制系统设计与应用

针对传统沉管基床抛石整平船移船定位精度差、效率低的问题,以襄阳市东西轴线道路工程鱼梁洲段项目为依托,采用GPS定位技术和分步阶段性控制策略,设计了一种沉管隧道基床抛石整平船自动移船控制系统,实现了船舶一键自动化移位.实船测试结果显示,该控制系统性能优越,与传统的人工移船相比平均定位精度提高了38％、平均移船时间节省了8...     

坐底式水下基床抛石整平船的研制与应用

文章介绍了整平船的结构形式、设备配置及先进的卫星定位系统、测量系统.在长江口深水航道治理工程一期工程水下基床整平中,可对10～100kg块石直接进行推平作业,将复杂的水下作业转化为水上操作,实现了抛石、整平和质量检测工作一体化.整平效率和精度都非常高.     

"青平1号"座底式基床抛石整平船测控系统设计

简要介绍“青平１号”座底式抛石整平船测控系统的设计原理,系统组成及操作要点,实践证明,该系统技术是先进、自动化程度高、操作简捷,可全天候作业,工效高。     

深水大流速块石抛填船研发

针对深水大流速工况下块石抛填石料落点偏移大、精度不易控制等问题,进行了深水块石抛填船的研发。采用格栅U型口溜槽及框架式行走台车设计形式,确保块石在大流速工况下不被冲散,减少了石料浪费。抛填面验收结果显示块石抛填合格率超过90%,实现了高精度定点抛填作业。     

江苏船舶工业优劣势分析

通过分析江苏船舶工业的发展现状,肯定了江苏船舶工业在地理位置、工业基础、劳动力、经营机制等方面的优势,指出了江苏船舶工业自主开发能力薄弱、技术设施落后、产品结构不合理等问题,为江苏船舶工业的科学发展规划提供依据。     

船载挖机水下自动化基床整平技术

为满足长江南京以下12.5 m深水航道二期工程仪征水道整治工程基床整平进度需要,结合现场工况条件,开发了新型的船载挖机水下自动化基床整平系统。该整平系统采用了大型驳船搭载自动化整平挖机以及辅助抛石溜筒,其整平设备建造周期短、投入少、费用低,且具备深水整平的能力,工艺安全可靠,施工工效快,基床整平质量可达规范±5 cm的要求。     

An empirical assessment of relational competitive advantage in professional ship management

Intense competition in many sectors across the maritime industry and in professional ship management in particular, means that the quest for achieving competitiveness will continue and intensify. A review of the current strategies across many sectors of the industry indicates the importance of forging stable partnerships for the achievement of competitiveness. Considering that the capability to form a relationship is an intangible resource (as depicted in resource-advantage theory), an empirical assessment in the context of ship management was undertaken. The assessment aimed to identify the type of relationships present in ship management, and succeeded in classifying those relationships into four distinct groups. The central thesis of the paper is that maritime organizations in general, and ship management companies in particular, may utilize their intangible relational resources in order to achieve competitive advantage. Based on the classification of ship management relationships, implications for managers are discussed.     

An empirical assessment of relational competitive advantage in professional ship management

Intense competition in many sectors across the maritime industry and in professional ship management in particular, means that the quest for achieving competitiveness will continue and intensify. A review of the current strategies across many sectors of the industry indicates the importance of forging stable partnerships for the achievement of competitiveness. Considering that the capability to form a relationship is an intangible resource (as depicted in resource-advantage theory), an empirical assessment in the context of ship management was undertaken. The assessment aimed to identify the type of relationships present in ship management, and succeeded in classifying those relationships into four distinct groups. The central thesis of the paper is that maritime organizations in general, and ship management companies in particular, may utilize their intangible relational resources in order to achieve competitive advantage. Based on the classification of ship management relationships, implications for managers are discussed.     

水上抛石施工工艺在潮间带区域的应用

以通州湾腰沙围垦一期通道工程B标抛石组织实施为例,通过开展规划临时航线、设置临时倒驳点、制定倒驳与抛设方案等一系列探索和研究,形成了针对浅海潮间带区域安全有效地组织水上抛石施工的专项技术方案,并描述了施工中应关注和优化的事项。     

Shipping and the competitive advantage of nations: the role of international ship registers

This paper argues that the creation of international ship registries by traditional maritime countries will not sufficient to halt the decline of their fleets. Over the last two decades shipping has undergone profound restructuring, characterized by a trend towards globalization and a search for a more efficient factor input combination. While shipowners from OECD countries have relied increasingly on flags of convenience, new maritime countries, particularly from Pacific Asia, have emerged, taking advantage of low-cost inputs and supportive national national environments. In the late 1980s the traditional maritime countries responded to the challenge by introducing international ship resistries. The Norwegian International Ship Registry is the most liberal and has the greatest success. Other new registries have limited impact. It appears that an international ship registry per seis not sufficient to reverse declining national fleets.     

抛石输运行为的连续时间随机行走模型应用

文章研究河道抛石的反常输运行为,应用连续时间随机行走模型,模拟抛石在河床上的运动行为。通过等待时间和跳跃步长的分布形式反映河床结构的异质性,从粒子随机运动角度解释了抛石在河道中反常输运的物理机理。应用蒙特卡罗模拟方法,直观展示了抛石输运过程中粒子在不同时刻下的空间分布情况。模型构建了单个粒子运动行为和宏观抛石输运现象之间的联系,对比实验结果验证了模型捕捉抛石反常输运现象的有效性,理论结果与实验高度吻合。分析结果表明,抛石运动过程中等待时间和跳跃步长的宽分布是导致抛石产生反常输运现象的主要原因。     

水抛石溜槽设计与施工

以青岛某工程为例,介绍水抛石装船工艺比较设计.由于地基条件较差,抛石量大,设计采用重力式码头装开体驳抛石工艺.比较了钢平台与溜槽工艺的优缺点,论述了溜槽的加工设计使用.     

两种主要测量手段在抛石护岸工程水下质量检测中的应用*

工程质量检测是保障工程发挥经济与社会效益的重要环节,其检测结果的正确性关系到工程能否正常运行。水下工程质量检测的主要测量手段为单波束测深仪与多波束测深系统,其测量结果的差异会对检测结果产生影响。对这2种测量手段施工前、后的测量数据以及差值的检测断面数据进行定性和定量分析。结果表明,施工前2种测量手段测量数据基本吻合,但施工后抛石增加了水下地形的复杂度,使两者的测量数据差异增加。此外,单波束的角度和航迹线的偏移对差值生成的检测断面数据有较大的影响,使两者的检测断面数据差异较大。据此,给出提高单波束检测精度的建议。