水下起吊作业力学特性研究

一种不同于常规的新型起吊方式一水下起吊正被发展中的深海技术考虑采用.文中采用了集中质量法建立了重物一起吊缆动态运动的数学模型,对坐底物品的吸附力特性与机理进行了初步探讨,估算出海底底质对重物的吸附力,讨论了在吊放回收物品过程中由于缆长变化引起的节点变化的数值计算处理方法,给出了边界条件和初始条件.计算模拟与分析了水下起吊整个作业过程,包括:起吊离底、回收物品与吊放物品,得到了每个作业阶段的动态响应与力学特性.

Motion Characteristics of Underwater Lifting Operation

A new lifting method called the underwater lifting,which is different from the traditional lifting method on water surface,is becoming a part of the developing deep-sea technology.In this pa-per, lumped mass method is employed to build up the dynamic movement mathematics model of the lifting cable.The attraction characteristic and mechanism of goods sitting on the sea bed are dis-cussed and researched,and the attraction is computed out.How to solve the problem is described that the total length of the cable out of the lifting ship is variable during recovering and releasing goods and gives boundary condition and initial condition.This paper also simulates and analyses in detail the whole operation process including off-bottom,recovering goods and releasing goods which are important steps of the whole underwater lifting operation,and gets the dynamic movement response and the mechanical characteristic at every step.