水下悬浮隧道缆索的优化研究

发布时间：2018-06-17 19:43

本文选题：水下悬浮隧道 + 琼州海峡　；参考：《天津大学》2015年硕士论文

【摘要】：随着经济的快速增长和社会的不断进步,沟渠的跨越问题越来越成为亟待解决的难题。目前已经开发出了各种水上桥梁、沉底管道等各种跨越方式,然而对于琼州海峡这样宽度和深度都很大的海峡的跨越问题尚未有更好的解决办法。水下悬浮隧道是一类先进穿越海峡湖泊的交通通道,它很经济、几乎无污染,且基本不受外界因素的影响,便于设置多类跨海、跨江等的供电、供水的管线,业已受到许多国家不断的关注。而锚索式水下悬浮隧道凭借其突出的优越性,更是成为国内外专家学者研究的重点。目前国内外对锚索式水下悬浮隧道的研究已经有了很多成果,但对缆索布置方式进行选优却少有文献提及。因此,本文对锚索式水下悬浮隧道缆索的优化进行了初步的研究。在查阅了国内外众多文献的基础上,本文首先简单的介绍了水下悬浮隧道的概念及研究概况,同时对新近提出的水下悬浮隧道的不同布置类型的特点及选型方法进行了分析,并以琼州海峡为例,结合琼州海峡特定的海况和不同水下悬浮隧道类型的特点,给出了适合琼州海峡海况的水下悬浮隧道的型式,也即锚索式水下悬浮隧道倾斜布索的型式,接着通过Gambit建立流场模型并将划分好的网格导入Fluent软件中进行模拟计算,得到了适宜的拖曳力系数,接下来以缆索对数、缆索倾角和缆索间夹角为变量,建立并计算分析了多个模型,给出了缆索的最优布置方案,最后以海流流速为变量,建立了大量模型,对锚索式水下悬浮隧道的缆索进行了初步的模态分析,结果发现,海流流速为1.4m/s~2.4m/s时,水下悬浮隧道缆索出现一阶模态振动的现象,海流流速为2.7m/s~4.0m/s时,水下悬浮隧道缆索便开始出现二阶模态振动的现象。
[Abstract]:With the rapid economic growth and social progress, the problem of ditch crossing has become an urgent problem. At present, all kinds of bridge and bottom pipeline have been developed, but there is no better solution to the crossing problem of straits with such wide width and depth as Qiongzhou Strait. The underwater suspended tunnel is a kind of advanced traffic passage through straits and lakes. It is economical, almost pollution-free, and basically independent of external factors. It is convenient to set up many kinds of pipelines for power supply and water supply across the sea and across the river. It has received constant attention from many countries. The anchor-cable-type underwater suspension tunnel, with its outstanding advantages, has become the focus of experts and scholars at home and abroad. At present, there have been a lot of achievements in the research of underwater suspended tunnel with anchor cable, but few references have been made on the selection of cable arrangement. Therefore, the optimization of cable in underwater suspension tunnel is studied in this paper. On the basis of consulting many literatures at home and abroad, this paper firstly introduces the concept and research situation of underwater suspended tunnel, and analyzes the characteristics and selection methods of different layout types of underwater suspended tunnel. Taking Qiongzhou Strait as an example, combined with the specific sea conditions of Qiongzhou Strait and the characteristics of different types of underwater suspended tunnel, the type of underwater suspension tunnel suitable for the sea condition of Qiongzhou Strait is given, that is, the type of inclined cable arrangement of anchor cable type underwater suspension tunnel. Then the flow field model is established by Gambit and the mesh is imported into fluent software to simulate and calculate, and the appropriate drag force coefficient is obtained. Then, the logarithm of the cable, the angle between the cables and the angle between the cables are taken as variables. Several models are established and analyzed, and the optimal arrangement scheme of cables is given. Finally, a large number of models are established with the current velocity as a variable, and a preliminary modal analysis of the cables in the cable suspension tunnel is carried out, and the results show that, When the current velocity is 1.4m/s~2.4m/s, the phenomenon of first-order mode vibration appears in the cable of underwater suspended tunnel. When the current velocity is 2.7m/s~4.0m/s, the second-order mode vibration of the cable begins to appear.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U459.5

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