海洋核动力平台单点系泊系统水动力性能的数值研究

发布时间：2018-05-18 08:59

本文选题：单点系泊系统 + AQWA　；参考：《大连理工大学》2016年硕士论文

【摘要】：核能的开发与利用是新时代人们在能源领域内所获得的极其伟大的成就,核电已经成为了很多国家电力系统的一部分,对能源结构和人类的生产生活以及全球的经济和政治格局都产生了巨大的影响。由于核能发电的过程需要消耗大量的水,且为了保障能源和环境的安全,将核电站搬到海上,设计高效、环保并且安全的海洋核动力平台是十分必要的。海洋核动力平台单点系泊系统在海上进行作业时会遭遇各种不规则的海况,因此为了保证作业工作的安全可靠,对平台在环境载荷作用下的水动力性能分析至关重要。本文就海洋核动力平台单点系泊系统在环境载荷作用下的水动力性能进行了以下三个方面的研究：海洋环境是复杂的,实际海浪的波动具有不规则波的特点,我们可以假设不规则波是由不同波长、波幅和相位的单元波叠加而形成的。对海洋核动力平台单点系泊系统在规则波下的水动力性能进行数值计算,得到的RAO响应与实验吻合较好,同时分析了海洋核动力平台在不同吃水下的附加质量和辐射阻尼的变化趋向,研究发现平台的附加质量和辐射阻尼与吃水均有较大的关系。对海洋核动力平台单点系泊系统在作业工况以及平台安装和解脱工况的不规则波作用下的运动响应和系泊力进行数值计算。分析了船舶吃水和波浪入射角度对平台水动力性能的影响,并将数值结果与实验进行了比较和讨论。研究发现在不规则波的作用下平台的吃水越大,产生的运动响应和系泊力越大。浪向为180°时平台的纵荡和x方向的系泊力较小,升沉响应和z方向的系泊力较大。对海洋核动力平台单点系泊系统在风浪流联合作用下的运动响应和系泊力进行数值计算,分析了不同工况对平台运动响应和系泊力的影响,并将数值计算与实验得到的的结果比较和讨论。研究发现风浪同向时,风的作用会抵消波浪对平台的作用,而风浪流同向时,流的作用会加剧平台的运动。当风浪同向时,流向与浪向的夹角越大,平台的响应越大,当夹角为90°时平台的响应最大,是海洋核动力平台单点系泊系统设计时需要重点考虑的工况。
[Abstract]:The development and use of nuclear energy is a great achievement in the field of energy in the new era. Nuclear power has become a part of the power systems of many countries. It has a great influence on the energy structure, human production and life, and the global economic and political pattern. In order to ensure the safety of energy and environment, it is necessary to move the nuclear power station to sea and design an efficient, environmentally friendly and safe marine nuclear power platform. Marine nuclear power platform single point mooring system will encounter a variety of irregular sea conditions when operating at sea, so in order to ensure the safety and reliability of the operation, it is very important to analyze the hydrodynamic performance of the platform under the action of environmental load. In this paper, the hydrodynamic performance of single-point mooring system of marine nuclear power platform under environmental load is studied in the following three aspects: the ocean environment is complex, and the waves of actual waves have the characteristics of irregular waves. We can assume that irregular waves are superposed by unit waves of different wavelengths, amplitudes and phases. The hydrodynamic performance of a single point mooring system of a marine nuclear power platform under regular waves is numerically calculated. The obtained RAO response is in good agreement with the experimental results. At the same time, the variation tendency of additional mass and radiation damping of marine nuclear power platform under different draught is analyzed. It is found that the additional mass and radiation damping of the platform have a great relationship with draught. The motion response and mooring force of a single point mooring system of a marine nuclear power platform under the action of irregular waves in the operating conditions and the installation and release conditions of the platform are numerically calculated. The influence of ship draught and wave incident angle on the hydrodynamic performance of the platform is analyzed, and the numerical results are compared with the experimental results. It is found that the larger the draught of the platform under the action of irregular waves, the greater the motion response and mooring force. When the wave direction is 180 掳, the longitudinal and x direction mooring forces of the platform are smaller, and the heave response and z direction mooring force are larger. The motion response and mooring force of a single point mooring system of a marine nuclear power platform under the combined action of wind, wave and current are numerically calculated. The effects of different working conditions on the platform motion response and mooring force are analyzed. The numerical results are compared and discussed with the experimental results. It is found that when wind and wave are in the same direction, the action of wind will counteract the action of wave on platform, and the action of current will aggravate the motion of platform when wind, wave and current are in the same direction. When the wind and wave are in the same direction, the larger the angle between the direction of wind and the wave, the greater the response of the platform. When the angle is 90 掳, the response of the platform is the largest, which is the key condition to be considered in the design of the single-point mooring system of the marine nuclear power platform.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U674.38

【相似文献】