Performance analysis of cargo-handling equipment from a green container terminal perspective

This study employs a green container terminal perspective to compare the performance of four types of cargo handling equipment used in container yards – automatic rail, rail, electric tire, and tire transtainers – based on working efficiency, energy saving performance, and carbon reductions. It is found that automatic rail and electric tire transtainers are the optimal types of green cargo handling equipment.     

关于铁路发展集装箱多式联运的探讨

集装箱多式联运是先进的运输组织方式之一,是国际物流活动的主导运输组织形式。通过分析影响铁路集装箱多式联运发展的因素,从密切与政府的统筹协商,加强铁路内部的协调,实现技术装备的改进以及转变经营策略等方面提出建议。     

“十三五”铁水联运战略研究

"十三五"时期是我国实现全面建成小康社会战略目标决胜期,同时是我国现代物流发展的赶超和跨越时期;国家十分重视综合交通协调发展,大力推行多式联运,提高运输效率。就我国"十三五"期间铁水联运的发展,通过SWOT方法进行分析研究,提出从经营、土地政策、投融资、运力支持、规章制度等方面加大政策支持,建立铁水联运价格形成机制,发挥价格的市场调节作用,借助互联网+技术,切实提高铁水联运信息化水平,整合既有各相关各部门信息系统,大力发展铁水集装箱联运战略。     

大型集装箱船主柴油机控制实时仿真系统

利用动态优化ＢＰ神经网络,面向对象技术、ＧＦＷ工控软件平台和多媒体技术开发了一个船用柴油机控制实时仿真系统。该系统实现了２７００箱集装船船“高河”轮Ｓ０７／９０遥控系统Ｓ０６安全保护系统,ＤＧＵ８８００电子调速系统和Ｂ＆Ｗ６Ｌ８０ＭＣ柴油机的动态仿真。该系统有两种操作方式,一种通过模拟机 控台和驾驶室控台的控制面板和车钟等进行操作另一种是通过触摸屏对控制系统的软界面进行操作。     

10万m3原油储罐罐底内底板腐蚀与牺牲阳极阴极保护

叙述了原油罐内的腐蚀状况与腐蚀机理 ,并介绍了大连某海港 10万m3原油储罐罐底内板涂料防腐和牺牲阳极联合保护对策及应用情况。结果表明 :原油罐底板内壁阴极保护后 ,保护电位均低于 - 0 85V(Cu/CuSO4 )。说明原油罐底板内壁实施牺牲阳极保护后 ,阴极保护系统稳定 ,牺牲阳极保持较低的工作电位 ,使原油罐底板内壁得到完全保护 ,达到了设计技术指标     

集装箱船整船有限元结构分析

文章以一艘１７００箱集装箱船为例,阐述了整船有限元结构分析方法。先建立全船有限元模型和质量模型,再用三维流体动力计算程序进行波浪随机载荷的长期预报,并在此基础上导出设计波参数组,最后,在全船有限元模型上 计算得出船体结构在各个设计波上的应力分布和变形结果,所得到的船体结构有限元分析结果对同类型集装箱船的设计和强度分析有一定的参考价值,对其它类型的船舶结构强度分析也有一定的借鉴意义。     

Modelling propeller and rudder induced forces acting on deep drafted vessels in muddy navigation areas

To assess the navigability of deep drafted vessels in muddy navigation areas a mathematical model has been built that takes into account the characteristics of the mud layer. This was achieved with the introduction of a fluidization parameter which determines the corresponding hydrodynamically equivalent depth above a solid bottom. As a result, the under keel clearance dependency of a given mathematical manoeuvring model can be reformulated in such way that the effect of any realistic muddy condition is included. In this article the modelling of the propeller and rudder induced forces and the implementation possibilities of the model will be discussed. It is concluded that the mathematical model, initially formulated for a 6,000 TEU container carrier, provides reliable predictions of the behaviour of larger container carriers and even fuller deep drafted ships.     

CSR节点力施加方法对集装箱船总强度评估的适用性研究

以10 000 TEU集装箱船为例,分别采用DNV规范中的节点力法及《油船散货船共同结构规范》(CSR)中的节点力法对其总强度进行计算。对比二者的计算结果,分析CSR节点力施加方法对集装箱船总强度评估的适用性及其优缺点。结果显示,CSR节点力施加方法适用于集装箱船总强度评估,且可有效避免局部应力集中现象。     

Locating dry ports on a network: a case study on Tianjin Port

A mathematical model for optimizing the location of dry ports is developed. The objective is to minimize the sum of the transportation costs and the fixed facility opening/closing costs. Unlike previous research on this subject, the possibility of closing existing dry ports is investigated. The dry port location problem is formulated as an integer programming and it is shown that the CFLP is a special case of our problem. The proposed model is then applied to the port of Tianjin in China and the sensitivity analysis is performed to demonstrate the robustness of the model. Our model suggests that while Tianjin Port should open some new dry ports, it might be better off closing those existing dry ports without enough throughputs. Although all parameters estimated should be uncertain in reality, sensitivity analysis shows that the results returned by the model are quite stable.     

Ultimate strength of container ships subjected to combined hogging moment and bottom local loads,Part 2: An extension of Smith's method

This paper is the second of two companion papers concerning the ultimate hull girder strength of container ships subjected to combined hogging moment and bottom local loads. The nonlinear finite element analysis in Part 1 has shown that local bending deformation of a double bottom due to bottom lateral loads significantly decreases the ultimate hogging strength of container ships. In this Part 2, extending Smith's method for pure bending collapse analysis of a ship's hull girder, a simplified method of progressive collapse analysis of ultimate hogging strength of container ships considering bottom local loads is developed. The double bottom is idealized as a plane grillage and the rest part of the cross section as a prismatic beam. An average stress-average strain relationship of plate/stiffened plate elements employed in Smith's method is transformed into an average stress-average plastic strain relationship, and implemented in the conventional beam finite element as a pseudo strain hardening/softening behaviors. The extended Smith's method is validated through a comparison with nonlinear finite element analysis.