超大型浮体波浪载荷特性研究
发布时间：2018-12-10 09:43
【摘要】：超大型浮体作为一种海上大型综合保障基地,近几年已经成为国际上海洋平台研究的新热点。能够准确合理地预报环境载荷,尤其是波浪载荷,是保证海洋结构物安全设计和可靠运营的前提条件。因此,开展超大型浮体水动力响应和波浪载荷预报方法研究,对超大型浮体的工程应用和海洋工程技术的发展都具有重要意义。本文以横向浮筒式超大型浮体为研究对象,基于三维势流频域理论,利用ANSYS/AQWA软件对单模块浮体和多模块浮体进行了水动力性能分析,并对波浪载荷开展预报研究。具体内容及主要结果如下:(1)对超大型浮体单模块水动力响应特征进行预报和分析。通过水动力软件AQWA-LINE在频域中预报计算了单模块浮体在波浪中的水动力特性,包括单模块浮体运动传递函数,以及各横剖面波浪剪力与弯矩响应随浪向角和波浪频率的变化关系,通过分析掌握了超大型浮体单模块运动和载荷响应的基本规律。(2)以超大型浮体单模块为研究对象,分析研究了其在南海短期极限海况和长期波浪统计资料下舯剖面垂向弯矩的短期预报和长期响应结果,经过适当的短期极值推断和长期预报结果综合比较分析,给出了设计载荷和设计波参数组合建议。(3)对超大型浮体多模块间的水动力干扰效应进行了计算分析,并对多模块在波浪中的运动传递函数与单模块进行了对比分析。针对南海短期极限海况,分析了模块间连接器上纵向力和垂向剪力的传递函数及载荷极值。提出了以垂向弯矩为主要设计参数的超大型浮体波浪载荷直接设计计算方法。本文在超大型浮体运动和载荷响应传递函数特征、设计波参数和设计计算方法等方面得出了一些结论,对超大型浮体研发具有一定的参考意义。
[Abstract]:As a large marine comprehensive support base, the super-large floating body has become a new research hotspot in the international offshore platform in recent years. Accurate and reasonable prediction of environmental loads, especially wave loads, is a prerequisite for the safe design and reliable operation of marine structures. Therefore, the research on hydrodynamic response and wave load prediction of super large floating body is of great significance to the engineering application of super large floating body and the development of marine engineering technology. In this paper, based on the theory of three-dimensional potential flow frequency domain, the hydrodynamic performance of single and multi-module floating bodies is analyzed by using ANSYS/AQWA software, and the wave load prediction is carried out. The main contents and results are as follows: (1) the hydrodynamic response characteristics of a single module of a very large floating body are predicted and analyzed. The hydrodynamic characteristics of a single module floating body in waves are predicted in the frequency domain by the hydrodynamic software AQWA-LINE, including the transfer function of the motion of the single module floating body. And the relationship between wave shear force and bending moment response with wave angle and wave frequency, the basic law of single module motion and load response of super large floating body is obtained by analyzing. (2) the single module of super large floating body is taken as the research object. The short term prediction and long term response results of vertical bending moment of midship profile under the short term limit sea condition and long term wave statistical data of the South China Sea are analyzed and compared with the results of proper short term extremum extrapolation and long term forecast. The combination of design load and design wave parameters is given. (3) the hydrodynamic interference effect between the multi-modules of super-large floating body is calculated and analyzed, and the motion transfer function of the multi-module in the wave is compared with that of the single module. The transfer function and load extremum of longitudinal force and vertical shear force on the connector between modules are analyzed in view of the short-term limit sea conditions in the South China Sea. A direct design method for wave loads of large floating bodies with vertical bending moment as the main design parameter is presented. In this paper, some conclusions are drawn on the characteristics of the motion and load response transfer function, the design wave parameters and the design calculation method of the super-large floating body, which is of certain reference significance for the research and development of the super-large floating body.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U674.38;U661.4
本文编号：2370371
[Abstract]:As a large marine comprehensive support base, the super-large floating body has become a new research hotspot in the international offshore platform in recent years. Accurate and reasonable prediction of environmental loads, especially wave loads, is a prerequisite for the safe design and reliable operation of marine structures. Therefore, the research on hydrodynamic response and wave load prediction of super large floating body is of great significance to the engineering application of super large floating body and the development of marine engineering technology. In this paper, based on the theory of three-dimensional potential flow frequency domain, the hydrodynamic performance of single and multi-module floating bodies is analyzed by using ANSYS/AQWA software, and the wave load prediction is carried out. The main contents and results are as follows: (1) the hydrodynamic response characteristics of a single module of a very large floating body are predicted and analyzed. The hydrodynamic characteristics of a single module floating body in waves are predicted in the frequency domain by the hydrodynamic software AQWA-LINE, including the transfer function of the motion of the single module floating body. And the relationship between wave shear force and bending moment response with wave angle and wave frequency, the basic law of single module motion and load response of super large floating body is obtained by analyzing. (2) the single module of super large floating body is taken as the research object. The short term prediction and long term response results of vertical bending moment of midship profile under the short term limit sea condition and long term wave statistical data of the South China Sea are analyzed and compared with the results of proper short term extremum extrapolation and long term forecast. The combination of design load and design wave parameters is given. (3) the hydrodynamic interference effect between the multi-modules of super-large floating body is calculated and analyzed, and the motion transfer function of the multi-module in the wave is compared with that of the single module. The transfer function and load extremum of longitudinal force and vertical shear force on the connector between modules are analyzed in view of the short-term limit sea conditions in the South China Sea. A direct design method for wave loads of large floating bodies with vertical bending moment as the main design parameter is presented. In this paper, some conclusions are drawn on the characteristics of the motion and load response transfer function, the design wave parameters and the design calculation method of the super-large floating body, which is of certain reference significance for the research and development of the super-large floating body.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U674.38;U661.4
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，本文编号：2370371
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