基于数值波浪水池的导管架平台流固耦合动态特性研究

发布时间：2018-05-04 12:08

本文选题：数值波浪水池 + 摇板造波　；参考：《东北石油大学》2017年硕士论文

【摘要】：伴随海洋能源的开发,在建立海洋工程的同时,研究者们越来越关注波浪与结构物之间的作用关系,同时随着计算机技术的兴起波浪也可由多种方式实现。在数值波浪水池的基础上实现造波的功能从而模拟波浪载荷与结构物的相互作用问题已成为水动力学者的研究热点。因此,本文研究的重点内容是在数值波浪水池的基础上,利用流固耦合原理模拟固体与流场之间的动态响应特性,主要工作及其研究成果包括以下几项:第一,分析介绍了数值波浪水池和流固耦合的背景意义及国内外的发展现状。同时,为实现水池的建立及耦合的模拟引入了计算流体力学波浪理论和流固耦合基本原理等相关概念。第二,采用摇板造波的原理,利用流体体积法(VOF)追踪自由面的变化情况,结合RNGk-?模型并求解N-S方程,以二次开发软件UDF宏命令编写程序,通过对相应参数及边界条件的设置建立了二维、三维数值波浪水池。同时,在二维、三维数值水池的模拟中均对比了摇板造波情况下阻尼层消波及斜坡消波的消波效果。通过监测面得到的数据将模拟后的结果与理论结果进行对比,两种数值水池模型都得出了阻尼层消波的消波效果高于斜坡消波效果的结论,得到了比较令人满意的效果。第三,基于数值波浪水池造波、消波功能,分析了桩基式导管架平台在流固耦合作用下的动态响应特性。首先,通过建立导管架模型,对单向耦合环境下部分导管架的动态响应特性进行了分析,通过数据处理得出了在单向耦合作用下结构物所受的压力和最大等效应力值的变化规律。其次,对桩腿建立有限元模型并对比了其在单、双向耦合作用下波浪与平台桩腿的动态响应结果。由桩腿所受的压力和最大等效应力值的变化规律得出了双向流固耦合更符合实际工程需求的结论。
[Abstract]:With the development of ocean energy, researchers pay more and more attention to the interaction between waves and structures, and with the rise of computer technology, waves can be realized in many ways. On the basis of numerical wave pool, it has become a hot topic for hydrodynamists to simulate the interaction between wave loads and structures by realizing the function of wave-making. Therefore, the main content of this paper is to simulate the dynamic response characteristics between solid and flow field by using the principle of fluid-solid coupling on the basis of numerical wave pool. The main work and research results are as follows: first, The background significance of numerical wave pool and fluid-solid coupling and its development status at home and abroad are analyzed and introduced. At the same time, the related concepts such as wave theory of computational fluid dynamics and the basic principle of fluid-structure coupling are introduced for the establishment and coupling simulation of water pool. Secondly, the principle of wave-making with rocking plate is used to track the change of free surface by using the fluid volume method (VOF), combining with RNGk-RNG? The N-S equation is solved and the program is written by using the secondary development software UDF macro command. The two-dimensional and three-dimensional numerical wave pools are established by setting the corresponding parameters and boundary conditions. At the same time, in the simulation of two-dimensional and three-dimensional numerical pools, the wave suppression effects of damping layer and slope are compared. The simulation results are compared with the theoretical results by the data obtained from the monitoring surface. The results of the two numerical water pool models show that the wave dissipation effect of damping layer is higher than that of slope wave suppression, and a more satisfactory result is obtained. Thirdly, based on the wave generation and wave dissipation function of numerical wave pool, the dynamic response characteristics of pile-foundation jacket platform under fluid-structure coupling are analyzed. Firstly, the dynamic response characteristics of partial jacket in unidirectional coupling environment are analyzed by establishing a jacket model. The variation of the pressure and the maximum equivalent effect force on the structure subjected to unidirectional coupling is obtained by data processing. Secondly, the finite element model of pile leg is established and the dynamic response results of wave and platform pile leg under single and bidirectional coupling are compared. According to the variation law of the pressure and the maximum equivalent effect force on the pile leg, the conclusion is drawn that the two-way fluid-solid coupling is more in line with the actual engineering requirements.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P742

【相似文献】