2003年国际干散货运输市场分析与展望

告别了不平凡的2002年,我们走入2003年。2002年之所以不平凡,是因为在一片惨淡之中,国际干散货运输市场一枝独秀,在很短的时间内就完成了结束低谷进入波峰的大动作,并把这种强势带入了2003年。虽然目前受远东地区农历新年的影响,市场出现一定的调整,但仍处于高位,假日过后市场将会重新步入上升区间,总体上今年的市场环境要好于2002年。     

港口货物吞吐量预测方法探讨

对常用的港口货物吞吐量预测方法进行了系统分析,并以重庆涪陵港为例,综合运用回归分析法、平均增长率法、弹性系数法、产销平衡法等定量预测方法和专家预测法等定性预测方法进行吞吐量预测,经与相关资料比较,表明其预测结果是合理的,同时本文采用的预测方法也可为其它港口的货物吞吐量预测提供参考。     

日照港散货堆场的设备选型

日照港散货堆场的装卸工艺,主要有“堆取分开”和“堆取合一”两种形式。从建设成本、占地面积、使用性能等三个方面来看,各有优缺点。根据日照港的设备选型情况,对两种布置形式进行比较。     

中国集装箱港口的现状与发展态势

通过对中国集装箱港口吞吐量与世界、亚洲、东亚地区的分析比较,论述了中国集装     

17500DWT 多用途货船优化设计

采用C语言程序,针对多用途货船的设计特点,结合设计人员对规范和理论的实际运用,编制计算程序,并运用正交设计法对主尺度进行优选。通过17500DWT多用途货船的实例计算证明,此方法方便易用,易于为设计人员使用。     

Spatial and Temporal Variability in Shipping Traffic Off San Francisco,California

Shipping traffic poses a worldwide threat to many large whale species. Spatially explicit risk assessments are increasingly being used as a tool to minimize ship-strike risk. These assessments often use static representations of shipping patterns. We used Automatic Identification System data to quantify variability in cargo shipping traffic entering and exiting San Francisco Bay, which contains some of the busiest ports in the United States, at three temporal resolutions: (1) before and after implementation of the California Air Resources Board's Ocean-Going Vessels Fuel Rule, (2) among seasons, and (3) day versus night. We used the nonparametric Mood's Median test to compare median daily distance traveled because the data were not normally distributed and the variance was not homogeneous. Our analyses show that shipping traffic off San Francisco is dynamic at both interannual and daily temporal resolutions, but that traffic was fairly consistent among the seasons considered. Our analyses emphasize the importance of economic and regulatory drivers on interannual shipping traffic patterns. Shipping traffic is expected to continue to change off the U.S. West Coast and to increase globally. These changes in shipping traffic could have implications for the risk of ships striking whales and should be included in risk assessments.     

罗源湾港区可门作业区1~#~3~#泊位水工建筑物设计关键技术

福州港罗源湾港区可门作业区1#~3#泊位工程码头水工建筑物结构等级大,其码头区具有地质岩面埋深变化巨大、周边建设条件复杂及限制因素多等特点。分析总结基槽开挖宽度的确定、开挖阶梯断面的设计及重锤夯实的技术要求等关键技术设计,其基槽开挖底宽的优化计算过程、阶梯断面及重锤夯实实施的技术指标可为类似工程的设计提供借鉴。     

面向双侧靠船全回转作业的新型煤炭码头通过能力仿真研究

针对黄骅港煤炭港区三、四期工程实例,系统分析了"双侧靠船、装船机全回转作业"的煤炭码头新型装船作业模式,建立了相应计算机仿真模型,基于港口服务水平评价指标对煤炭码头合理通过能力进行研究,为该项目的规划设计提供了科学的决策支持依据。     

论鳌山湾港区在青岛港的地位与发展前景

青岛港是我国北方的主枢纽港之一,将逐步成为东北亚地区国际航运中心。根据青岛的经济地位和发展潜力,综合分析了青岛港现存问题和鳌山湾经济腹地发展及对港口的海运需求,鳌山湾作为青岛港集装箱的接续港区,将重点发展集装箱运输,兼顾经济腹地杂货和大件运输的需求。     

Wave responses of a coastal cargo ship consisting of unit modules

This article discusses the dynamic responses of a coastal cargo ship that consists of unit modules with advance forward speed in waves. We introduce a simple way of connecting the modules that has enough capability to link the modular parts of the ship as a unified whole. The flexible connection consists of male and female rubber fenders with additional pretensioned ropes. This kind of connection system is proposed for use in coastal regions with relatively calm waters wherein the modular ship can move at a moderate speed. The modules are assumed to be rigid compared to the connections. Computations were performed to investigate the vertical elastic responses of four modules connected end-to-end with the assumption that in the simple hinge, no gaps occur in the flexible rubber connections between adjacent modules. A simple method, which is an extension of the computational analysis we reported previously, is presented to study the hydroelasticity and rope tension forces of the modular ship with forward speed in waves. Experiments with a three-dimensional model at Froude numbers of 0 and 0.16 in head waves were performed to evaluate the effectiveness of the calculation method. In the experiments, deflections for each part were measured using calibrated potentiometers. Force transducers were used to measure the rope tension force between the modules of the articulated cargo ship. Some slight differences were observed, but generally the calculated results showed the same trends as the experimental values.