在建舾装船防强风系缆决策研究

发布时间：2018-09-14 09:53

【摘要】：当出现台风、大风浪等特殊天气时,在航船可以去避风港停靠或锚地抛锚避风,但在船厂内建造的舾装船舶在水下码头靠泊期间,由于建造期没有动力,甚至锚机都没好,就算在台风季节,也无法去锚地抛锚避风,只能停在码头通过系缆来抗风,容易受到破坏性作用,严重时造成系泊缆索断裂、护舷破损,从而引起船舶撞击码头或倾覆,给国家财产和人员生命造成严重损失,那么如何验证所系带缆绳能否保证船只系泊安全,没有理论支持。因此,必须开展科学的模拟研究工作,分析恶劣天气下受台风作用时水下在建船舶的运动状态,分析缆索的受力大小,确定合理的系缆方式,为水下船舶的防台防汛工作做指导。本文以大连地区某船厂码头系泊的在建舾装船的系缆情况为依托,选取两个典型船型3900箱集装箱船(C3900)和18万散货船(BC1800),利用两种方法:一是以典型船型台风时在厂内的实际系缆方式及系缆数量为研究对象,通过建立实际系带缆绳坐标系并对船体进行网格剖分,考虑各种环境因素对系带的每根缆绳进行力学分析及计算汇总,计算出一定周期内每根缆绳的最大受力情况,以验证缆绳的系带情况是否满足台风要求;二是简化环境因素,通过简化计算得出船舶的受力情况,从而决策系缆方案,并对两种方法进行对比,得出简化计算基本反应了实际情况的结论,可以指导现场防台工作。
[Abstract]:When there are special weather conditions such as typhoons, storms and other special weather conditions, ships may stop at a safe port or anchor to avoid wind and wind. However, during the period of berthing at an underwater dock, the outfitting ship built in the shipyard has no power during the construction period, and even the anchors are not good. Even during the typhoon season, it is impossible to anchor and avoid the wind at the Anchorage. It can only be stopped at the wharf to resist the wind through the mooring cable, which is vulnerable to destructive effects. In serious cases, the mooring cable is broken and the fender is damaged, thus causing the ship to crash into the wharf or overturn. It has caused serious losses to national property and human life, so how to verify whether the mooring safety of the ship can be guaranteed by the mooring cable is not supported by theory. Therefore, it is necessary to carry out scientific simulation work to analyze the motion state of the ship under construction under the action of typhoon in severe weather, to analyze the force of the cable, and to determine the reasonable mooring mode. To provide guidance for flood prevention and control of underwater ships. This paper is based on the mooring of a shipyard dock mooring in Dalian area. Two typical ship types, 3900 box container ship (C3900) and 180000 bulk carrier (BC1800), are selected. Two methods are used: one is to study the actual mooring mode and the number of mooring cables in the factory during a typical typhoon. Through the establishment of the actual mooring cable coordinate system and the meshing of the hull, considering various environmental factors, the mechanical analysis and calculation of each cable of the mooring band are carried out, and the maximum force of each cable in a certain period is calculated. In order to verify whether the tether of the cable meets the requirements of typhoon, the second is to simplify the environmental factors and get the stress of the ship by simplified calculation, so as to make decision on the mooring scheme, and compare the two methods. It is concluded that the simplified calculation basically reflects the actual situation, and can guide the work of preventing the attack on the spot.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U671.91

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