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。     

基于LabVIEW的空气流量传感器性能检测系统

本文简述了传统空气流量传感器检测系统的弊端,提出了一种基于LabVIEW软件的空气流量传感器测试系统的设计方案。本系统运用LabVIEW灵活性和多输入多输出的特点,能够很好地实现对测试数据实时绘图,方便操作。同时,给出了详细的硬件和软件设计方案。     

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。     

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.     

船舶纵向气囊下水宽支座弹性计算方法初探

本文介绍了船舶纵向气囊下水的气囊运动机理，构建了船体与气囊受力模型，并将船体、气囊与船台假定为串联弹簧体系，提出了船舶纵向气囊下水宽支座弹性计算方法。     

货车正面碰撞下货物约束系统的冲击能量分布

利用UG和VPG技术建立了由车辆-货物-约束器械构成的货物约束系统的动力学模型，对其进行正面碰撞模拟仿真，得到车身变形和冲击能量分布状况。结果表明，驾驶室前部变形比较严重，起到了吸收能量的作用，后部货厢变形较小，货厢的冲击能量小于驾驶室的能量。分析结果可为确定货物约束系统的安全评价指标提供理论依据。     

石家庄地铁地下停车场通风空调系统方案设计

结合石家庄地铁地下停车场通风空调系统设计,通过对停车库通风、空调、采暖、排烟4个方面的难点问题进行分析,并通过利用工程经验、借鉴规范等方法,提出全面的系统设计解决方案。研究结论:停车库内通风量、排烟量分别按照3 m层高、实际层高,6次/h换气考虑;检修平台考虑局部空调,提高作业人员舒适度;土壤有蓄热效应,按局部考虑采暖即可,不必对停车库内进行大面积采暖。