海洋潜标系统布放动力学分析

布放是浮标系统投入使用前的一个关键的作业过程。研究海洋潜标系统布放过程中的水动力特性,对安全顺利地实现布放有重要的意义。考虑海洋潜标系统各部分的水动力作用和系留索的弹性变形,通过时域模拟海洋潜标系统在500m水深海域的采用浮标先行投放法的布放过程,计算了海洋潜标系统布放过程中的动态响应,并分析了波高、作业船速度和系留索弯曲刚度对布放的影响。得到的结果表明：锚位会滞后于锚投放点；系留索曲率和有效张力的最值都出现在缆索与锚的连接段；锚触底时缆索瞬时张力达到峰值；系留索的弯曲刚度是影响布放的重要因素,随着弯曲刚度增大,锚位明显前移,系留索的有效张力峰值和曲率都会降低；波高和作业船速度的改变对于浮标系统布放的动态响应的影响幅度很小。

Dynamic analysis for the deployment of oceanographic subsurface buoy system

It is of important significance to study the hydrodynamic characteristics of oceanographic subsurface buoy system during the process of deployment, which is a key procedure for the operation of buoy system, and for the implementation of a safe, smooth deployment. Taking the flexibility of the mooring line and the effects of fluid inertia force into account, this paper simulates an anchor-last deployment for an oceanographic subsurface buoy system in a 500m-deep sea and calculates the dynamic response of the subsurface buoy system during the deployment. Additionally, the effects of wave height, speed of operation ship, and bending stiffness of mooring line are intensively examined via numerical simulation. The results show that: (1) the location site of anchor after deployment is behind the desired anchor-drop position; (2) the curvature and the effective tension of mooring line both achieve the maximum values in the cable above the anchor; (3) the transient tension of mooring line will reach the peak value when the anchor touches the seabed; (4) the bending stiffness of cable is an important factor for buoy deployment, and as the bending stiffness is increased, the anchor position moves forward and the peak values of tension and curvature for mooring line decrease; (5) the height of wave and the speed of operation ship have little influence on the results.