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我国沿海船舶活动频繁且通航密度大、航线设计交汇叠加、会遇局面频繁发生、船舶交通事故及险情多发,在这样的航路上,规划和设立分道是目前最有效的方式.文中就沿海关键水域设定分道通航进行了探讨,以期优化我国沿岸航行船舶航路,努力减少我国沿海的航行风险. 相似文献
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With maritime transportation has played an important role in global economy development, ship traffic has become more congested. Therefore, ships navigate under risk conditions, and thus maritime accidents have occurred frequently. Especially, ship passing through a narrow channel is even more dangerous. Because, the ships are easy to be affected by external forces such as wind and currents that can cause ship drifts. Many latent risks are present during navigation. In order for the development of a sensible and appropriate traffic model for the safety and efficiency ship navigation, this study has focused on the actual ship behavior to understand the ship drift in the Kurushima Strait, Japan, which is one of the most dangerous routes in Japan. The analysis of ship behavior was carried out using the Automatic Identification System (AIS) data. As a result, the ships drift was understood in detail, and the latent risk was unveiled when ships pass through the narrow route. Moreover, the risk areas were obtained and visualized by the ship drift behavior analysis. The obtained results can be applied to ensure safe navigation and the development of an eco-friendly and economy efficient for ship navigation. 相似文献
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我国内河水域新建桥梁在对主墩进行施工过程中,为了确保船舶正常通航,海事部门要求实行单向通航。因此,主墩施工期间桥区水域可能出现船舶排队等候过桥的现象,船舶等候过桥势必增加桥区水域复杂的通航环境,目前海事部门规定桥区水域(单向通航)航行的船舶之间应保持足够的安全距离。通过建立数学计算模型对桥区水域(单向通航)通航船舶之间安全距离进行量化研究,探讨出桥区水域船舶之间安全距离计算方法。为海事部门制定桥区水域通航安全管理规定、维护桥区水域良好的通航秩序和船舶过桥安全提供科学的理论依据。 相似文献
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船闸通过能力与日平均过闸次数、一次过闸吨位、年通航天数、船舶装载系数以及运量不均衡系数有关,在船闸运营过程中这些因素都存在一定的不确定性,对船闸通过能力的计算产生很大的影响。为消除不确定性因素的影响,采用基于MC法的计算机仿真研究船闸通过能力,并以新夏港河船闸年过闸货运量作为研究对象予以说明。运行结果表明,计算机仿真能够较好地应对不确定性问题,为船闸工程建设中船闸通过能力计算提供理论依据。 相似文献
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分析了黄、东海区目前的通航现状,建议以123°经线为中线在黄、东海区增设通航分道,与交通部制定的原北方沿海定线分道配合使用,供过往船舶合理选择,同时也可有效地限制违章作业渔船对航行船舶的影响,达到规范海区航行秩序,确保船舶安全的目的。 相似文献
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为更好地掌握三峡船闸通航潜力,采用结构化和动态化的方法,建立了三峡船闸实际通过能力的动态化模型,描述货船载重吨、闸次、艘次、闸室面积利用率等参数与船闸通过能力的动态关系,计算2011—2030年三峡船闸实际通过能力,预计2015年后船闸通过能力将逐步饱和,船闸挖潜空间有限,建议抓紧优化标准船型系列,同时尽快开展新建通航设施的研究论证。 相似文献
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为避免波浪涌入港内,沿岸港口皆构筑防波堤,堤口及通行水道不宜过宽,采用单向航行以缩小水道宽度是普遍现象。船舶进出港单向航行涉及进出顺序的安排。船舶自动识别系统(AIS)自2004年4月生效实施,提供了船舶动态、静态及航次相关信息数据,对VTS的交通组织服务而言,给予船舶通行管制莫大的帮助。为避免船舶在港口水域因为等候进出造成的拥挤招致碰撞,交管中心对于到达船舶及出港船舶必须作出适当的排序,既可解决通航安全,亦可达到通航效率。本研究就船载AIS所提供的信息中,与船舶通行安全有关的数据,以高雄港水域为例,运用AHP方法作成权重因素分析,其结果可作为运用于整合性船舶交通组织模型研究的参考。 相似文献
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针对e-航海背景下的船舶绿色、低碳航行问题,本文提出一种基于非线性反馈的闭环增益成形算法。首先阐述了e-航海技术与船舶智能航行之间的共性,以大连海事大学无人船艇“蓝信”号为船舶模型,在保持已有的闭环增益成形算法不变的基础上,引入正弦函数驱动的非线性反馈代替原有的误差线性反馈。仿真结果表明,基于非线性反馈的闭环增益成型算法控制器更加节能,符合e-航海的要求;闭环增益成形算法控制器设计简单,工程中易于实现。 相似文献
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Collision risk assessment for ships 总被引:1,自引:0,他引:1
Efficient maritime navigation through dynamic obstructions at close range is still a serious issue faced by mariners. There
have been studies focusing on collision risk assessment in the past, but the majority were based on the first person perspective,
with area-based ship domain concepts that are defined around either the ownship or the obstacle. Such methods are acceptable
for encounters where the ownship is required to manoeuvre according to the collision regulations (COLREGs), but they will
not work correctly if the ownship is the stay-on party. This article presents an alternative method of assessing the collision
risk for surface ships in close-range encounters that is compliant with the COLREGs as well as other ships from different
perspectives. 相似文献
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By taking into account certain boundaries of the maneuvering region, along with navigation obstacles and other moving ships,
the problem of avoiding collisions in navigation traffic areas was reduced to a dynamic optimization task with static and
dynamic constraints. In heavy navigation traffic areas and within coastal zones, correct selection of a ship's speed, when
accompanied by the necessary trajectory changes, is a crucial element of safe navigation. This paper presents a modernized
version of the evolutionary ship trajectory planning system in which a new parameter was introduced, namely changes of the
ship's speed along particular sections of the trajectory. Generally, a safe trajectory is estimated using specialized genetic
operators for modifying the trajectory. Here, an additional operator was added to the system that mutates the ship's speed.
Sample results present the safe trajectory for a ferry meeting other moving ships and navigational constraints on its way.
Received for publication on Dec. 2, 1998; accepted on June 16, 1999 相似文献
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葛洲坝1号船闸由于与三峡船闸匹配运行,船舶实行导航墙待闸,下行船舶在导航墙停靠时距离人字门较近,而且下行船舶首船进闸后停靠位置与下闸首人字门距离较近,都具有碰撞人字门的风险。针对葛洲坝1号船闸人字门存在被碰撞的风险,结合上、下闸首的现场情况分别就上、下闸首人字门增设防撞设施方案的可能性进行分析,提出提升式、侧开式和下沉式等方案,并讨论各方案实现的可能性、优势及不足,为船闸人字门防撞安全设施的方案设计及应用提供参考。 相似文献
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为提升江苏内河集装箱运输船舶标准化水平,实现船型与船闸、航道等通航基础设施发展相匹配,通过梳理内河标准船型主尺度标准和通航管理规定的修订情况,结合京杭运河江苏段集装箱营运船舶的调研,在船舶主尺度、舱室布置、船体结构和新能源动力的应用等方面分析江苏内河集装箱船标准船型的设计要点,完成48 TEU、64 TEU和96 TEU标准集装箱船设计。虽然受限于内河航运关注船舶成本的现状,标准集装箱船的设计更多采用传统基础船型设计思路,但研发运用先进技术、满足内河EEDI的绿色节能型船舶是标准船型的重要发展方向。 相似文献
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天津港复式航道的探讨 总被引:1,自引:1,他引:0
天津港主航道可双向航行25万t级船舶,目前大小船混行,船流密度太大。根据预测2020年吞吐量将达到7亿t,到港船舶将进一步增加,届时主航道将难以适应。通过分析多年实际到港船舶资料和预测,70%以上为万t级以下船舶,据此提出在现主航道南北2侧各挖1条万t级单向航道,专供万t级以下船舶使用,万t级以上船舶仍航行主航道。大小船舶分道航行形成的复式航道,可以适应今后吞吐量发展的需要。同时调整进港锚地,避免进出港航行交叉。 相似文献