潮流自适应仿真模拟关键技术研究
发布时间：2018-11-07 13:23
【摘要】：潮流的数值模拟是海洋科学研究中一个重要的技术方法,已成为海岸工程、环境工程中了解潮流的重要且有效的手段。通过潮流的数值模拟能更好的指导海岸海洋的管理、开发与应用。潮流数值计算是在离散的计算网格上进行的,因此采用合适的计算网格对数值计算成败起着至关重要的作用。潮流数值模型的计算量大,耗时较长,因此实时监视和控制计算过程是非常重要和必须的手段。由于潮流数值模拟数据量较大,如何全面且高效地展现数据中所蕴含的信息是可视化研究领域的一个热点。 本文针对当前潮流数值模拟过程中亟待改进的地方,提出了潮流自适应仿真模拟,并进行了相关的研究。在计算网格生成研究中,引入了顾及地形特征的自适应网格生成技术,通过提取地形坡度值和海岸边界曲率作为控制尺寸的依据。在潮流数值模型研究中,本文使用了FVCOM潮流模型中的水动力模块。并设计了一种动态监控机制,对模型计算过程进行跟踪并在需要时予以控制。研究了自适应可视化技术,根据数据属性和用户选择对数据进行精炼和选择,减少无关信息,提高了可视化效率并增强了数据的表现力。取得的成果如下： (1)通过提取地形坡度值作为控制尺寸的依据,对海岸边界按照曲率进行离散,并借助背景网格法和AFT网格生成技术,自动生成顾及地形特征又能满足模型计算精度要求的变密度网格。 (2)设计了动态监控机制,实现了计算过程中的数据跟踪监视、计算干预和参数调整,提高了模型的计算效率和自动化程度。 (3)实现了水下地形、潮流、潮间带等动态可视化,并研究了融合显示、流场数据抽稀、LOD等技术,提高了渲染效率并增强了数据的表现力。 最后在潮流模型、自适应可视化技术、动态监控研究的基础上实现了潮流模型仿真模拟原型系统,并通过实例验证了本文研究的可行性和有效性。
[Abstract]:Numerical simulation of tidal current is an important technical method in marine scientific research. It has become an important and effective means to understand tidal current in coastal engineering and environmental engineering. Numerical simulation of tidal current can better guide coastal ocean management, development and application. The numerical calculation of power flow is carried out on the discrete grid, so it is very important to use the appropriate grid for the success or failure of the numerical calculation. The calculation of the numerical model of power flow is large and time-consuming, so real-time monitoring and controlling the calculation process is very important and necessary. Because of the large amount of data in numerical simulation of power flow, how to display the information contained in the data comprehensively and efficiently is a hot topic in the field of visualization. In this paper, the adaptive simulation of power flow is put forward and the relevant research is carried out in order to improve the process of numerical simulation of power flow. In the research of computational mesh generation, an adaptive mesh generation technique, which takes into account the terrain features, is introduced. The slope value and the curvature of the coastal boundary are extracted as the basis for the control of the size. In the research of numerical model of power flow, the hydrodynamic module of FVCOM power flow model is used in this paper. A dynamic monitoring mechanism is designed to track and control the model calculation process. The adaptive visualization technology is studied to refine and select the data according to the data attributes and user selection, which can reduce the irrelevant information, improve the visualization efficiency and enhance the performance of the data. The results obtained are as follows: (1) the coastal boundary is discretized according to the curvature by extracting the slope value of the terrain as the basis for controlling the size, and the background mesh method and AFT mesh generation technology are used. Automatic generation of variable density meshes that take into account terrain features and meet the requirements of computational accuracy of the model. (2) the dynamic monitoring mechanism is designed to realize the data tracking and monitoring, calculation intervention and parameter adjustment in the calculation process, and the calculation efficiency and automation degree of the model are improved. (3) dynamic visualization of underwater topography, tidal current and intertidal zone is realized, and fusion display, flow field data thinning and LOD are studied. The rendering efficiency is improved and the performance of data is enhanced. Finally, based on the research of power flow model, adaptive visualization technology and dynamic monitoring, the simulation prototype system of power flow model is implemented, and the feasibility and effectiveness of this study are verified by an example.
【学位授予单位】：南京师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P731.23
本文编号：2316498
[Abstract]:Numerical simulation of tidal current is an important technical method in marine scientific research. It has become an important and effective means to understand tidal current in coastal engineering and environmental engineering. Numerical simulation of tidal current can better guide coastal ocean management, development and application. The numerical calculation of power flow is carried out on the discrete grid, so it is very important to use the appropriate grid for the success or failure of the numerical calculation. The calculation of the numerical model of power flow is large and time-consuming, so real-time monitoring and controlling the calculation process is very important and necessary. Because of the large amount of data in numerical simulation of power flow, how to display the information contained in the data comprehensively and efficiently is a hot topic in the field of visualization. In this paper, the adaptive simulation of power flow is put forward and the relevant research is carried out in order to improve the process of numerical simulation of power flow. In the research of computational mesh generation, an adaptive mesh generation technique, which takes into account the terrain features, is introduced. The slope value and the curvature of the coastal boundary are extracted as the basis for the control of the size. In the research of numerical model of power flow, the hydrodynamic module of FVCOM power flow model is used in this paper. A dynamic monitoring mechanism is designed to track and control the model calculation process. The adaptive visualization technology is studied to refine and select the data according to the data attributes and user selection, which can reduce the irrelevant information, improve the visualization efficiency and enhance the performance of the data. The results obtained are as follows: (1) the coastal boundary is discretized according to the curvature by extracting the slope value of the terrain as the basis for controlling the size, and the background mesh method and AFT mesh generation technology are used. Automatic generation of variable density meshes that take into account terrain features and meet the requirements of computational accuracy of the model. (2) the dynamic monitoring mechanism is designed to realize the data tracking and monitoring, calculation intervention and parameter adjustment in the calculation process, and the calculation efficiency and automation degree of the model are improved. (3) dynamic visualization of underwater topography, tidal current and intertidal zone is realized, and fusion display, flow field data thinning and LOD are studied. The rendering efficiency is improved and the performance of data is enhanced. Finally, based on the research of power flow model, adaptive visualization technology and dynamic monitoring, the simulation prototype system of power flow model is implemented, and the feasibility and effectiveness of this study are verified by an example.
【学位授予单位】：南京师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P731.23
【参考文献】
相关期刊论文 前10条
1 马劲松,朱大奎;海岸海洋潮流模拟可视化与虚拟现实建模[J];测绘学报;2002年01期
2 刘志武;王菁;许继军;;应用一维水动力学模型预测三峡水库蓄水位[J];长江科学院院报;2011年08期
3 林珲,闾国年,宋志尧,王杰臣,陈钟明,施毅;地理信息系统支持下东中国海潮波系统的模拟研究[J];地理学报;1997年S1期
4 钟鹤翔;谢志仁;闾国年;袁林旺;信忠保;;基于GIS的自适应三维古海面—地面演变模型研究[J];地理研究;2011年05期
5 吴静;吴晓燕;王紫翼;;跟踪驾驭式弹道可视化仿真系统设计与实现[J];航空兵器;2008年05期
6 茅丽华,严以新,宋志尧;潮流计算结果的可视化[J];海洋工程;2000年04期
7 江毓武,陈宗团;厦门港三维潮流数值模拟[J];海洋工程;1998年04期
8 孙长青,郭耀同,赵可胜,陈斌林;海州湾及邻近海域潮流数值计算[J];海洋科学;2003年10期
9 姚彦忠;曹轶;肖丽;李伟;;基于实时计算的可视化技术的研究与应用[J];华中科技大学学报(自然科学版);2005年S1期
10 朱松林，陆瑞松;计算流体力学可视化功能的实现[J];武汉交通科技大学学报;1996年03期
，本文编号：2316498
本文链接：https://www.wllwen.com/kejilunwen/haiyang/2316498.html
