南海导管架平台浮托安装实测研究

发布时间：2019-07-01 20:01

【摘要】：随着工业发展对自然资源的消耗，陆地上的石油、天然气资源日益枯竭，淡水资源也极度贫乏。而在大海的深处恰恰蕴藏着大量的油气及淡水资源，因此，，海洋工程的发展，势必走向深海。深海资源的开发需要面对恶劣的海洋环境，因此需要重量更大，结构更强的海洋结构物才能完成这一任务，而这种结构物的安装日益受到人们关注。浮托安装法是针对于特大型海上结构的一种极具发展前景的安装方法，它利用潮水变化带来的巨大浮力，将重量巨大的海上结构从浮托驳船上转移到预定的支撑结构上，完成安装过程。本文以荔湾3-1的浮托安装的过程为背景，研究对浮托安装过程的实测技术，并根据实测结果，对浮托安装的数值预报技术进行对比研究。进行的主要工作有：利用GPS/INS监测驳船六自由度运动；利用X波段测波雷达得到浪、流；利用压力式潮位仪和机械式风速仪监测潮位及风；利用光纤应变片监测驳船护舷载荷；监测数据的集成显示；对实测结果的质量进行分析，并将处理后的实测结果应用于浮托数值计算，对比分析出数值计算在预报浮托安装过程中的可靠性。得到的主要结论有：本文给出了一套浮托安装过程中，驳船运动和海洋环境的精确测量方案；给出了一种经济有效的护舷载荷估算方法；设计出一套方便于工程应用的数据通讯与集成显示方案。相应的，成功测量出可靠的实际数据，可应用于对比模型试验与理论计算结果；通过与理论计算的对比分析，得出通过采取合理的数值波浪模型及粘性阻尼系数，时域分析方法能够较为可靠的预报浮托驳船的波频运动情况的结论。
[Abstract]:With the consumption of natural resources by industrial development, the oil and natural gas resources on land are exhausted day by day, and the fresh water resources are also extremely poor. There are a lot of oil and gas and fresh water resources in the depths of the sea, therefore, the development of marine engineering is bound to go to the deep sea. The development of deep-sea resources needs to face the bad marine environment, so it needs heavier and stronger marine structures to complete this task, and the installation of this kind of structures has attracted more and more attention. Float installation method is a promising installation method for super large offshore structures. it transfers the heavy offshore structure from the buoy barge to the predetermined support structure by using the great buoyancy caused by the tide change, and completes the installation process. In this paper, based on the installation process of the float in Liwan 3 / 1, the measured technology of the installation process of the float is studied, and the numerical prediction technology of the installation of the float is compared according to the measured results. The main work is as follows: using GPS/INS to monitor the movement of barge with six degrees of freedom; using X-band wave radar to get waves and currents; using pressure tidal level gauge and mechanical anemometer to monitor tide level and wind; using optical fiber strain gauge to monitor barge fender load; integrated display of monitoring data; The quality of the measured results is analyzed, and the processed measured results are applied to the numerical calculation of the float, and the reliability of the numerical calculation in the process of predicting the installation of the float is compared and analyzed. The main conclusions are as follows: in this paper, a set of accurate measurement scheme of barge motion and marine environment in the process of float installation is given, an economical and effective method of fender load estimation is given, and a set of data communication and integrated display scheme is designed, which is convenient for engineering application. Accordingly, reliable practical data can be successfully measured, which can be applied to compare the results of model test and theoretical calculation, and through the comparative analysis with theoretical calculation, it is concluded that the time domain analysis method can predict the wave frequency motion of buoy barge more reliably by adopting reasonable numerical wave model and viscous damping coefficient.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P742

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