船舶失控应急的港珠澳大桥桥区水域尺度

确定桥区水域范围是保证通航船舶和桥梁安全的一个重要因素,但是目前国内外对于如何划分桥区水域的大小并没有明确的标准.以港珠澳大桥为研究对象,从桥梁的有效航宽、拖轮施救时间和船舶失控危险区域三个方面计算了桥区水域尺度.通过对各种工况的计算比较,得出港珠澳段桥区水域尺度为桥梁两侧各2 n mile.     

三峡库区定线制航路改革与航道建设探讨

介绍实行船舶定线制航路改革的内涵、作用和方法,总结长江干线已实施船舶定线制改革的经验,深入分析川江和三峡库区的航道条件和通航船舶类型等特点,校核航道尺度,探讨三峡库区实施定线制航路改革的方法和航标等配套设施的布设方式,可作为今后规划建设川江航道的参考.     

西江水系运输船舶能耗评价体系研究

结合西江水系运输船舶能耗管理实际,归纳总结了运输船舶工作特点以及能耗主要影响因素,从技术、营运、管理三方面提出13项评价指标,构建了西江水系运输船舶能耗评价指标体系,提出各项指标的测算模型,并选取典型船舶进行了实证研究.     

Time-variant ultimate longitudinal strength of corroded bulk carriers

Many bulk carrier losses have been reported of late, and one of the possible causes of such casualties is thought to be the structural failure of aging hulls in rough weather. In aging ships, corrosion and fatigue cracks are the two most important factors affecting structural safety and integrity. This paper uses a set of the time-dependent corrosion wastage models for 23 different member locations/categories of bulk carriers previously developed by the authors, based on the available corrosion measurements for existing large bulk carrier structures. Differences due to the location and corrosion severity of every member type are taken into account. The nominal design corrosion values for the primary members are suggested based on the annualized corrosion rates obtained in the present study. The effect of time-variant corrosion wastage on the ultimate hull girder strength as well as the section moduli is studied. The criteria for repair and maintenance of heavily corroded structural members so as to keep the ultimate longitudinal strength at an acceptable level are discussed. Important insights and conclusions developed are summarized.     

Human driving data-based design of a vehicle adaptive cruise control algorithm

This paper presents a vehicle adaptive cruise control algorithm design with human factors considerations. Adaptive cruise control (ACC) systems should be acceptable to drivers. In order to be acceptable to drivers, the ACC systems need to be designed based on the analysis of human driver driving behaviour. Manual driving characteristics are investigated using real-world driving test data. The goal of the control algorithm is to achieve naturalistic behaviour of the controlled vehicle that would feel natural to the human driver in normal driving situations and to achieve safe vehicle behaviour in severe braking situations in which large decelerations are necessary. A non-dimensional warning index and inverse time-to-collision are used to evaluate driving situations. A confusion matrix method based on natural driving data sets was used to tune control parameters in the proposed ACC system. Using a simulation and a validated vehicle simulator, vehicle following characteristics of the controlled vehicle are compared with real-world manual driving radar sensor data. It is shown that the proposed control strategy can provide with natural following performance similar to human manual driving in both high speed driving and low speed stop-and-go situations and can prevent the vehicle-to-vehicle distance from dropping to an unsafe level in a variety of driving conditions.     

对绍兴辖区船舶触损桥梁事故的思考

绍兴作为一座历史悠久的城市，以“水乡、桥乡”闻名遐迩。但同时，船舶触碰桥梁事故时有发生，造成了一定的经济损失、人员伤亡和不良的社会影响。文中根据近年来绍兴辖区数起船舶触损桥梁事故，通过分析原因，结合实际情况，把握关键性问题，提出了一些防范措施和解决对策。     

PARNASSOS与肥大型船的尾部水动力优化

以某肥大型船为研究对象，系列变化其尾部线型，然后利用荷兰MARIN水池开发的粘流计算软件PARNASSOS计算尾部流场，分析粘性阻力和伴流场随线型的变化规律，总结了肥大型船尾部优化时要注意的问题。     

我国加入压载水公约的前景分析和对策

本文介绍了船舶压载水的由来及相关国际公约,就压载水公约产生的影响进行分析,对各领域的前景作了合理的预测。对照公约要求,结合我国实际,从国际与区域管理、国家管理和港口管理三个层面,日常管理和应急管理两个方面,提出应采取的对策措施。     

钢质海船尾轴换新工艺策划

在一般的钢质海船修理中,尾轴换新的情形并不多。本文以"将军2"轮的尾轴存在严重裂纹而换新的工程实例,介绍了该尾轴换新的工艺策划过程及项目,目的在于为以后可能的钢质海船尾轴换新工程提供一些参考资料。