不同泊位长度对LNG船系泊的影响

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。

Effect of different berth lengths on LNG ship mooring

The effect of different berth lengths on the mooring of 172,000 m3 LNG ship is studied by the 1:60 overall model test.The movement and cable tension of the ship under the combined action of wind,wave and flow are analyzed.The research shows that under the conditions of transverse wave,transverse wind and falling current,the length of berth is shortened,and the bow and stern cable force shares part of the transverse cable force,which is beneficial to the balanced bow and stern cable and transverse cable force,and the maximum cable forces become smaller;the change of berth length has little effect on mooring force under the conditions of downwave,downwind and falling current;under the condition of oblique wave,transverse wind and falling current,the ship is affected by oblique wave,and the wave force is distributed in both directions,and the force of spring cable is basically the same as that of transverse cable or bow and stern cable;when the wind is following,the spring force will be greater than the transverse force and the bow and stern force.The study recommends a suitable berth length for the Tianjin LNG project,which can provide reference for the design of the wharf.