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舟山群岛海域规划有多个LNG重要港址,对于保障长三角天然气供应具有关键作用。LNG码头具有自身建设要求高和对外排他性强的特性,在舟山群岛海域为代表的开敞岛礁海域建设具有较大技术难度。以舟山六横和上海洋山LNG码头为例,系统分析开敞岛礁海域对LNG码头规划布置的影响,分析码头和航道布置关键问题,论证多个大型LNG泊位联合布置的安全间距,研究LNG船舶通航安全和通航效率影响,提出LNG码头规划布置方案。结果表明,开敞环境下布置多个大型LNG泊位时,与掩护条件较好时相比应适当增加安全间距,注意横风、横流以及斜顶流的影响,确保船舶通航安全,要控制LNG合理运输规模,采取通航优化措施,提升区域船舶通航效率。 相似文献
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对港口地位与功能的演变进行了分析;介绍了国内外港口规划发展状况,提出了我国港口规划存在的主要问题;对当前港口规划中的几个热点问题进行了分析和研究,并提出了解决的措施与建议。 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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通过对洋山深水港区选址和规划的回顾,提出了洋山深水港区具有独特的区位优势、良好的自然条件、可观的经济效益和不错的社会效益;根据北港区建成后的海床冲淤变化,利用数值模拟技术、物理模型试验和船舶航行模拟技术综合分析得出,洋山深水港区北港区规划方案采用半汊道方案为稳妥、合理的方案;归纳了对洋山港总体规划的建议。 相似文献