深水海洋环境的随机性研究及其在平台操作模拟中的应用

发布时间：2018-01-17 00:03

本文关键词：深水海洋环境的随机性研究及其在平台操作模拟中的应用　出处：《上海交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：本研究课题依附于国家863课题“深水海洋平台海上作业模拟操作系统”，以上海交通大学自主开发的“海洋石油981平台深水模拟系统”为研究基础，针对海洋平台操作系统中深水海洋环境的随机性变化展开研究并开发了模拟程序。本论文中在分析介绍深水海洋环境组成的基础上，选取了海洋环境中最主要的三大环境因素，，即风、波浪与海流作为研究与模拟对象。针对每个环境因素分别在分析模拟操作系统所提出的模拟要求的基础上，设计了模拟方法并利用Matlab软件开发了模拟程序，给出了模拟程序流程图以及模拟参数选取方法。在风速模拟方面，本文选取了组合风速模型作为基本模拟模型，并在其基础上针对海上风速特性以及风速随高度变化特性进行改进，另外，还增加了无参数法模拟方法。在风向模拟方面，在分析风向随机变化特性的基础上分别设计了每小时主导风向以及瞬时风向的模拟方法与模拟参数取值办法。针对三维波浪模拟，本文在分析多种波浪模拟方法之后，选取了以波浪谱为基础的模拟方法，提供了多种频谱函数与方向扩展函数进行三维波浪动态模拟。在海流模拟程序开发过程中，根据海流流速及流向在实际环境中的变化特性，分别设计了同一水深处流速、流向的随机模拟方法，以及不同水深处流速及流向垂向分布的模拟方法。另外，在海流流速的模拟中，还加入了针对海洋激流的随机模拟。最后，将各环境因素的模拟程序进行整合，完成了深水海洋环境整体随机性模拟程序的开发工作。本研究论文中还设计了不同的环境输入参数，给出了各种情形下风、波浪以及海流的随机模拟结果，并对模拟结果进行了分析。本模拟程序计算快速，模拟结果真实性及随机性较好，获得了良好的模拟效果，满足了模拟系统所提出的模拟要求，并实际应用到了海洋平台模拟操作系统对于海洋环境随机性变化的模拟工作中。
[Abstract]:This research subject is attached to the national 863 project "Offshore Operation Simulation operating system of Deepwater Offshore platform", which is based on the "Offshore Oil 981 platform Deepwater Simulation system" developed by Shanghai Jiaotong University. In this paper, a simulation program is developed for the stochastic variation of deep water marine environment in the operating system of offshore platform. On the basis of analyzing and introducing the composition of deep-water marine environment, three main environmental factors in marine environment, namely wind, are selected in this paper. Wave and current are the research and simulation objects. According to each environmental factor, the simulation requirements proposed by the simulation operating system are analyzed respectively. The simulation method is designed and the simulation program is developed by using Matlab software. The flow chart of the simulation program and the method of selecting simulation parameters are given. In the wind speed simulation, this paper selects the combined wind speed model as the basic simulation model, and on the basis of the wind speed characteristics of the sea and wind speed with height change to improve, in addition. The non-parametric simulation method is also added in wind direction simulation. Based on the analysis of the stochastic variation characteristics of wind direction, the simulation method and the simulation parameters of the dominant wind direction per hour and the instantaneous wind direction are designed, respectively. After analyzing a variety of wave simulation methods, this paper selects the simulation method based on wave spectrum. A variety of spectrum functions and directional spread functions are provided for 3D wave dynamic simulation. In the course of the development of the current simulation program, according to the current velocity and flow direction in the actual environment change characteristics. The stochastic simulation method of the velocity and direction of the same water depth and the simulation method of the vertical distribution of the velocity and direction of the different water depth are designed respectively. In addition, in the simulation of the current velocity. Finally, the simulation program of various environmental factors is integrated to complete the development of the whole stochastic simulation program for the deep-water marine environment. In this paper, different environmental input parameters are designed, and the random simulation results of wind, wave and current under various conditions are given, and the simulation results are analyzed. The simulation results have good authenticity and randomness, and obtain good simulation results, which meet the simulation requirements proposed by the simulation system. And it is applied to the simulation of the stochastic change of the ocean environment by the offshore platform simulation operating system.
【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】：P751;P742

【参考文献】