淤泥质海域海床基吸附力与结构优化研究

发布时间：2018-01-01 00:23

本文关键词：淤泥质海域海床基吸附力与结构优化研究　出处：《青岛科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着海洋资源开发的深入,国家对海洋环境监测技术的重视程度不断增加。近年来,海床基作为环境监测设备在海洋环境监测方面的到了广泛应用。但是海床基的低回收成功率一直是限制其发展的重要原因。吸附力问题是影响海床基回收的主要因素。国内外学者经过大量的实验研究得出了潜坐机构吸附力的经验公式,但是要准确分析设备结构因素对吸附力的影响程度还是困扰学者的一个重要问题。随着有限元技术的不断完善和发展,计算机模拟技术以其性价比高、操作简便等优势得到广泛的应用。本文首先利用SolidWorks对海床基整体结构进行简化建模,然后利用ABAQUS对影响海床基吸附力的各种因素进行了仿真研究。结果表明,海床基在淤泥中的浸没深度和提升方式是影响海床基吸附力的主要因素;吸附力随海床基底座开孔数量的增加而减小,但是影响因素较浸没深度和提升方式低;同一设计基准下,底座形状对海床基的吸附力的影响基本可以忽略,设计时可以根据搭载设备的需要进行合理选择;通过对淤泥固结时间的分析可以看出,淤泥固结时间较短,海床基坐底之后10天左右淤泥中孔压就已基本消散。由海床基在海底的工作时间可知,不必考虑淤泥孔压未消散情况对海床基吸附力的影响;最后综合海床基吸附力影响因素的结果,对海床基外罩、整体框架形式、仪器舱等结构进行了优化设计。
[Abstract]:With the development of marine resources, the importance of marine environmental monitoring technology has been increasing in recent years. As an environmental monitoring equipment, seabed has been widely used in marine environmental monitoring. However, the low recovery success rate of seabed is an important reason to limit its development. The problem of adsorption is the main factor that affects the recovery of seabed. After a lot of experimental research, the empirical formula of the adsorption force of the submersible mechanism has been obtained by domestic and foreign scholars. However, it is still an important problem for scholars to analyze the influence of equipment structure factors on adsorption force accurately. With the development of finite element technology, computer simulation technology has a high ratio of performance to price. The advantages of simple operation and other advantages have been widely used. Firstly, SolidWorks is used to simplify the modeling of the whole structure of seabed. The results show that the depth of submergence and lifting mode of seabed in silt are the main factors affecting the adsorption of seabed. The adsorption force decreases with the increase of the number of holes in the seabed base, but the influencing factors are lower than the immersion depth and lifting mode. Under the same design datum, the influence of base shape on the adsorption force of seabed base can be neglected, and the reasonable selection can be made according to the need of carrying equipment. Through the analysis of the consolidation time of the silt, it can be seen that the consolidation time of the silt is relatively short, and the pore pressure in the silt has basically dissipated about 10 days after the foundation of the seabed sits on the bottom, which can be seen from the working time of the foundation of the seabed in the seafloor. It is not necessary to consider the influence of undissipated silt pore pressure on the adsorption capacity of seabed. Finally, based on the results of the influence factors of the adsorption force on the seabed, the optimum design of the seabed base outer cover, the integral frame form, the instrument cabin and so on is carried out.
【学位授予单位】：青岛科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X834

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