潜标上浮过程中垂直运动数学建模与验证  

Mathematical Modeling and Result Validation of Mooring Vertical Movement in the Course of Floating-up

作　　者：郭永青[1] 李小龙 熊学军[1,3] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]中海石油深海开发有限公司,广东深圳518067 [3]海洋环境科学和数值模拟国家海洋局重点实验室,山东青岛266061

出　　处：《海岸工程》2015年第2期11-23,共13页Coastal Engineering

基　　金：国家科技重大专项子任务--南海陆坡底流观测(8400531981);工业和信息化部海洋工程装备科研项目--500米水深油田生产装备TLP自主研发;国家自然科学基金--黄海暖流的多时相特征及其发生机制研究(41376038);海洋公益性行业科研专项--常用海底声纳测量仪器计量检测关键技术研究与示范应用(201305034)

摘　　要：以2014年南海北部陆坡M站春、秋两季底流观测潜标回收为例,建立数学模型分析潜标上浮过程中垂直运动特征。首先做出忽略水平海流影响、刚性连接以及主要部件外形简化等假设。通过刚性连接部分上浮数值试验,得到释放后各部件能够保持相对位置不变、整体上浮的结论。视整个系统为刚体建立了垂直运动模型。分别模拟两次潜标回收,模型与高精度超短基线观测结果的对比表明:整个上浮过程可分为加速上浮阶段和稳定上浮阶段;模型速度曲线与观测速度拟合线比较接近,给出的平均模型速度与平均观测速度均相差0.2m/s;模型能够反映出在稳定上浮阶段,稳定上浮速度随时间缓慢降低的变化特征;各部件上浮的垂直速度是振荡变化的。模型可为相关水下仪器回收工作提供定量化依据。Taking the recovering of the Bottom Current Observation Mooring,which was carried out at Station M on continental slope of the Northern South China Sea in spring and autumn of 2014,as the example,the vertical movement characteristics of the mooring in the course of its floating-up are analyzed by means of mathematical modeling.Firstly,it is assumed that the influence of horizontal current is neglected,the mooring system is connected rigidly and the shape of the mooring＇s major parts is simplified.From the numerical experiments made for floating-up of the rigidly connected parts of the mooring,it is concluded that after releasing all the parts of the mooring can keep their relative position unchanged and float upward as a whole.Thus,the vertical movement model is established by regarding the mooring system as a rigid body.Two times of mooring recovery are simulated by using the model and comparisons are made between the results from the model and from the observations with high-precision USBL.The results indicate that the overall course of the mooring floating-up can be divided into two stages：the accelerated floating-up stage and the stable floating-up stage.The velocity curve given by the model is close to the fitted curve of observed velocity.The differences between the mean velocity given by the model and the observed mean velocity are0.2m/s.The model can reflect that in the stable floating-up stage the floating-up velocity decreases slowly with time.The floating-up vertical velocity of all parts of the mooring shows an oscillating change.The Model can provide a quantitative reference for the recovering of relevant underwater instruments.

关 键 词：潜标回收 潜标垂直运动 数学建模 数值计算 高精度超短基线 

分 类 号：P731.2[天文地球—海洋科学] P71