吸力锚下放过程的动力学分析

Dynamic analysis for lowering of suction anchor

吸力锚技术可为船舶和平台提供系泊力和支撑基础,且施工简便,可反复利用,为此对吸力锚的下放过程进行分析。运用Orca Flex软件建立了吸力锚下放过程的动力学分析模型,计算得到了一些结论:在顺浪状态下,吸力锚下放过程中不会发生大的横摇及艏摇,但在吸力锚完全没入水中后会发生比较明显的纵摇;横浪状态下与顺浪状态下的主要不同是:在顺浪状态下吸力锚的横摇角和艏摇角始终为0°,而在横浪状态下,吸力锚的横摇角在时域上随着吸力锚入水深度的增加也逐渐增加,艏摇角则呈现出在时域上先增大后减小并会在时域中发生小范围的反复波动。

Suction anchors can offer mooring force and support base for ships and platforms. Its construction is easy and it can be utilized repeatedly. This paper analyzes the lowering process of the suction anchor. The dynamic analytical model is established by applying software Orca Flex,and following concludes are obtained through calculation： In the following sea state,the rolling and yawing of the anchor during lowering process are not large,but the pitching of the anchor will be obvious when the anchor emerges into water completely. The main difference is that in the following sea state,the rolling angle and yawing angle of the anchor are zero constantly; but in the beam sea state, the rolling angle will gradually increase with the increasing emerging depth of the anchor, the pitching angle will increase first and then decrease with small fluctuation.