船只补给悬链线系统运动特性分析

Analysis of motion characteristics of supply vessel catenary systems

船只索道补给越来越广泛用于两船或船岸之间物资传送,本文综合考虑船只与锚泊系统的耦合以及船只运动对索道的影响,通过计算波浪中船只补给悬链线系统的动力学响应,得到了船只补给悬链线系统的运动特性,为系统设计提供依据。运用索道悬链线理论和有限元方法,对模型进行了计算,并对数值模拟结果和理论结果进行了比较。结果表明:数值模拟结果和理论结果整体吻合较好;三级海况下,连接设备时应将船只侧面对着固定物,连接点应在船只的中心线上。高海况条件下,应考虑垂荡的影响,理论模型简化因素较多,索道跨距80 m之后,应以仿真分析模型为主。

The cableway has been widely used by supply vessels in shore- to-ship or ship- to-ship transfers of goods and materials. By analyzing the motion of the catenary system in supply vessels,and considering the effects of the coupling of vessels and mooring systems and the shipmotion on cableways,we calculated the dynamic response of the catenary systems of supply vessels,from which obtained the motion characteristics of vessel catenary systems. The result provides the basis for the cableway design. Based on the cableway catenary theory and using the finite el-ement method （FEM）,we established a model and performed simulations. We then compared the numerical simu-lation and theoretical results,which showed that the results were mostly consistent. In a sea state code of 3 , vessels should be connected to the device side facing the fixture and the connection point should be on the centerline of the vessel. In a very rough ocean environment,the impact of heave should be considered. As there are many simplified factors in the theoretical model,when the cableway span exceeds 80 m,the simulation model should be considered first.