全回转吊舱式推进器线型设计

对吊舱推进器的特点、水动力性能以及代表厂商和产品进行了介绍。通过对线型设计时所需注意事项的分析,展示了其在多种船型领域的适用性。     

地铁线路设计研究

研究目的:地铁线路设计是重要的环节,确定的设计参数直接影响工程造价。本文针对辅助线、曲线线间距、坡度等线路涉及的设计内容进行探讨,把理论和具体做法通过实例总结出来,给线路设计提供一些借鉴和帮助。研究方法:结合沈阳地铁线路设计经验,采用几何和代数方程方法进行研究。研究结果:通过研究地铁线路设计中相关参数,得出有效长度、渡线、线间距、节能坡度等计算公式,并阐述了设计中结构限界、轨道类型、信号制式等对线路设计的影响。研究结论:本次研究的计算方法,表明地铁的线路设计与轨道、信号等参数密切相关,不同参数决定不同的设计内容。要进行不同的方案比选,才能得出合理的线路设计方案。     

应用斜桩实用公式计算高桩刚性桩台桩力影响线

应用桥梁承台斜桩实用公式法推导出刚性桩台桩力影响线的计算公式,并应用于港口工程高桩刚性桩台桩力影响线的计算,其结果完全能满足工程设计要求。该公式简单、实用、方便,可供设计人员结构设计时参考。     

船体线型自动光顺机

对目前船体线型光顺三种主要方法进行了比较。从船体线型光顺现状和用户的要求统一起来考虑，提出光顺软件可以在无人频繁干预的情况下全程运行完成光顺，以避免线型光顺软件目前所呈现的无序操作和结果的多变性。在对样条曲线和光顺手段进行线性化处理后，运用确定型有穷自动机（DFA）和图灵机（TM）的数学模型描述方式提出自动光顺机的设想和实现方法－－一个面向放样工操作的船体线型自动光顺软件。     

单线区段车站到发线电码化设计探讨

简述单线区段到发线车站电码化的设置原则,对到发线叠加ZPW-2000系列电码化设计的2种主要类型进行分析,对电路存在的问题提出改进意见,进行小结。     

Long-term prediction method for the green water load and volume for an assessment of the load line

 To develop a practical prediction method for the green water load and volume on the bow deck in irregular waves, model tests were conducted using a tanker and a cargo ship on a domestic Japanese voyage. The relation between green water load and relative water height at the stem was considered. Based on the finding that the maximum value of the green water load is proportional to the square of the maximum value of the water elevation over the bow top, the probability density functions of the green water load and volume in short-term predictions were proposed. It was verified that the proposed functions show good agreement with the measured distributions, especially in the tails, and were better than conventional functions. Using these functions, long-term predictions of the green water load were carried out. It was confirmed that the present method is more rational than the conventional one for estimating the long-term probability of the green water load. An assessment of the bow height of a domestic Japanese ship from the viewpoint of deck wetness was carried out using these prediction methods. This research was used as the technical background for the revision of domestic rules on load lines, which was enforced in October 2001. Received: July 19, 2002 / Accepted: October 30, 2002 Acknowledgment. Some of the present study was carried out as part of a cooperation project (RR45) with the Shipbuilding Research Association of Japan, supported by the Nippon Foundation. Address correspondence to: Y. Ogawa (e-mail: ogawa@nmri.go.jp)     

120m新型远洋渔船燃油舱保护设计

《远洋渔船2015》中指出,将合计燃油舱容积为600 m3及以上的所有远洋渔船的燃油舱保护规则纳入新造渔船的考核指标。本文针对某新型120 m远洋拖网渔船,依据燃油舱保护要求,兼顾渔船方型系数小、渔船空间有限等特殊性质,采用确定式隔离法,对新型远洋渔船的燃油舱进行设计;借助HD-SHM2005型线光顺软件将该船舷侧内壳设计成曲面,并在此曲面上进行后续曲面板材和曲面型材的建模、曲面零件的展开和加工数据的生成,既优化了船体空间又提高了生产设计效率。     

Merging Socioeconomic Imperatives with Geospatial Data: A Non-Negotiable for Coastal Risk Management in South Africa

The current approach to coastal development set-back delineation in South Africa is producing high-tech empirical methodologies that attempt to pinpoint areas at risk from physical coastal processes and the subsequent positioning of set-backs in relation to these risk areas. Experience in the Western Cape province of South Africa has shown that this approach contributes only partially to coastal risk management. In the context of an urban and peri-urban environment, and bearing in mind that set-backs have significant socioeconomic implications, the development of a set-back line at the local scale requires an expansion beyond just relying on the numerical modeling of physical coastal processes. This research reveals that such an approach is parochial and socially detached and a more inclusive and integrated approach grounded in and spanning localized social, cultural, economic, political, and ecological intricacies of the coastal space is required. Fundamental to achieving this is a re-consideration of the broader project management processes applied in the development of set-backs. The article concludes with a set of principles and guidelines for determining set-backs in complex coastal contexts at the local scale.     

既有线提速接触网硬点消除的探讨

既有线第6次大面积提速给接触网平顺性提出了更高的要求，同时也给接触网的施工和维护单位的改造、检护、维修工作提出了新的课题。此文结合哈尔滨铁路局在既有线接触网整治中的成功做法和经验，就既有线提速以后如何消除接触网硬点和提高接触网平顺性进行了有益探讨。     

7万吨级成品油船线型优化设计

介绍了当前国内外市场需求量较大的船舶品种之一--7万吨成品油船的船体线型优化设计,共进行了两次优化设计（艏部改型和艉部改型）,派生出三个不同的船型方案,其中包括两个不同的球艏和两个艉线型方案.船模试验结果表明：在设计航速处,改型方案2较方案1（原型）的兴波阻力下降21%,在较大的航速范围内其有效功率下降4.5%～1.9%,推进效率提高2.5%;而改型方案3则较方案1（原型）的兴波阻力下降30%,其有效功率下降5.7%～3.1%,推进效率提高2.6%.将其与现有同类船型的性能进行了比较,证明该船的最终船型方案是优秀的,改型是成功的.同时,本文也结合近代大方形系数船舶的船型特点,就艏艉线型变化对船舶阻力及推进性能的影响（特别是对船舶快速性能影响较大的横剖面形状、浮心位置、设计水线以及球艏形状）也进行了较为详尽的分析,提供了某些较佳尺度及参数范围以供设计人员参考.