导流缆拖曳系统运动敏感性分析与探讨

Sensitivity analysis on towing performance of a faired cable system

为探讨导流缆拖曳系统各模型参数对其稳态运动性能的影响,采用数值仿真方法对拖曳系统的运动敏感性进行了具体的分析研究.在给出具体的拖曳系统运动数学模型的基础上,以拖曳深度、张力、侧漂3个稳态运动响应参数作为评估指标,借助模型参数敏感性指数,仿真计算了缆阻力系数、单位长度质量、重心浮心水动力中心位置及拖体重量等模型参数变化对导流缆拖曳系统运动的影响.结果表明,缆阻力系数、单位长度质量及拖体重量对系统运动有显著影响,而缆重心浮心水动力中心的侧向偏移则和系统的漂移现象密切相关.

In this paper, sensitivity analysis on the steady-state towing performance of a faired cable system was conducted through a numerical simulation method, which is mainly used to study the effect of some model coeffi- cients of faired cable towing system. After giving the detailed mathematical model of a faired cable towing system and considering three steady state motion response parameters, i.e. the towing depth, towing tension, and kiting deviation as sensitivity criteria, the effect of model parameters changes; including cable drag coefficient, mass per unit length, weight, and hydrodynamic force centers, etc., on the towing performance was computed. The simula-tion results show that cable drag coefficient, mass per unit length, and towed body＇s mass have remarkable effect on the towing performance, and the lateral deviation of buoyancy, weight and hydrodynamic force centers are strongly related to the kiting phenomenon.