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泊位长度与系缆方式影响系泊船舶的运动量和系缆力,泊位长度确定和系缆方式选择是大型开敞式码头设计中的一个重要课题。以17.2万m~3LNG船为研究对象,通过物理模型试验,研究风、浪、流共同作用下系泊船舶的运动量和系缆力,分析泊位长度与系缆方式对系泊船舶的影响,研究结果表明:较短的泊位长度对横向运动、缆力大小以及缆力间的均匀性有一定的改善;在横风横浪作用下,短泊位时横缆分开布置对船舶运动有较好的约束,能减小艏艉缆及倒缆的受力,而在泊位较长时,横缆应集中布置,避免横缆长度不一,较短的横缆承担较大的作用力。 相似文献
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随着我国港口深水化、泊位离岸化的发展趋势,设计对开敞式码头相关标准的认识、应用都更加深入。近年来开敞蝶形码头的布置,尤其是泊位长度成为研究重点,物理模型试验结合数学模型分析计算是优化泊位长度的主要方式。比较国内外泊位布置模式,系缆力分析和均匀缆绳张力分布以及不同动力荷载下减少靠泊船舶运动量是研究的主要内容。已有码头泊位长度研究成果多倾向于英国、OCIMF等标准。 相似文献
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通过1∶60的整体模型试验研究了不同泊位长度对17. 2万m~3LNG船系泊的影响,分析了船舶在风浪流联合作用下的运动量和缆绳张力变化情况。研究表明:横浪、横风、落潮流条件下,泊位长度缩短,艏、艉缆力分担了部分横缆力,对均衡艏、艉缆和横缆力有利,最大缆力变小;顺浪、顺风、落潮流条件下,泊位长度变化对系缆力影响不大;斜浪、横风、落潮流条件下,船舶受斜波作用,其纵横向均分配波浪力,倒缆与横缆或艏艉缆的受力基本相当;顺风时,倒缆力会大于横缆力和艏、艉缆力。该研究为天津LNG项目推荐了合适的泊位长度,可为码头工程设计提供参考。 相似文献
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船首靠离式滚装船泊位长度论证探讨 总被引:1,自引:0,他引:1
船舶所需泊位长度的大小不仅与船型有关,还与船帕的的驶靠方式密切关。本文在分析船首靠离式滚装船靠泊特性的基础上,结合《河港工程设计规范》对—般船舶所需泊位长度的规定,提出了论证船首靠离式滚装船所需泊位长度的新方法。 相似文献
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The planning, design and development of a container terminal with optimum size and capacity and with a minimum capital cost
is fundamentally dependent upon the loading and discharging operations at the quayside. The quayside function of container
terminals is dependent basically on the number of berths available to service the incoming container ships. The objective
of the container terminals dealing and admitting the ongoing ship calls is to provide immediate berth and loading and discharging
services to the container ships with a minimum costly waiting time and a maximum efficiency. Previously terminal planners
used to build extra berths to provide service. During the last two decades the terminal operators have adopted automation
technologies in loading and discharging operation of the container ships as an alternative to designing extra berths. Ship
owners naturally expect least waiting times for their container ships. On the other hand, it is also natural for port operators
in a container terminal with costly facilities to see a high berth occupancy and productivity at the quayside. This study
uses queuing theory to find a break-even point as a way of evaluating the cost of container ship waiting times and the cost
of berth unproductive service times for container terminals aiming to automate their quayside operation. The analysis illustrates
that automation devices installed on conventional Quayside Cranes (QSCs) significantly reduce the turnaround time of the container
ships calling at the ports. It argues, however, that there should be a balance between the cost of berth unproductive service
times and the cost of vessel waiting times. The study introduces a break-even point to be considered as a benchmark for calculating
such a balance. The analysis in this study can be used as a decision tool for the operators of container terminals in the
medium to small ports to appraise the feasibility of an investment in automation or expansion of the quayside facilities. 相似文献
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双船系靠LNG泊位对系泊稳定性要求高,而目前尚无船行波对双船系靠泊稳定性影响的定量分析方法。结合工程实例,以Flory-Remery单船系泊船行波荷载计算方法为基础,结合双船系靠泊位的特点予以修正,利用数值分析软件定量分析船行波过程对双船系靠泊位系泊稳定性的动态影响。结果表明,典型系泊条件下,双船系靠泊位系泊倒缆受力及纵移运动量受船行波影响最大,当船行波与系泊船间距50 m时系泊稳定性不满足要求;当船行波与系泊船间距100 m时系泊稳定性满足要求;当船行波与系泊船间距150 m时系泊稳定性基本不受船行波影响。 相似文献