基于流固耦合的深海悬浮隧道悬浮动力响应影响研究

发布时间：2018-02-03 03:06

本文关键词： 悬浮隧道流固耦合有限元数值模拟　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：沟通海峡、海湾两侧的交通建筑在全球不同地方得到了广泛地应用,例如多种多样的海底隧道和跨海大桥。但这些传统的跨海通道在面对超宽阔的海峡是就显得没有什么可行性了。这就为新型的沟通海域两岸的交通方式——水中悬浮隧道的产生,提供了前提。Submerged Floating Tunnel简称SFT,即水中悬浮隧道,这种新兴的沟通不同海域之间的交通方式,产生于二十世纪,它的原理在于达到隧道重力、隧道受到的浮力和隧道构架结构之间各种作用力的平衡,从而让隧道能够稳定在水中的某个深度下。这种新兴的沟通不同海域的交通方式有下面三种优势:第一,构建水中悬浮隧道受到的地理因素约束少。这是在于SFT对所在地的地理环境造成的影响小;第二,减少了交通时间和距离。相比于跨海大桥和海底隧道,SFT因为其构建位置的物理性质,使得在沟通相同的海峡之间,SFT的跨度最小;第三,同样的,SFT对所在地的生态环境影响是最小的。综合这些优点,SFT这种新兴的交通方式有着广泛的应用前景和市场价值。这也让这种交通方式,成为隧道研究的新方向。对于SFT,本文进行了下面三项探索:首先,对于Cnoidal理论、Stokes理论、Solitary理论等非线性波理论和线性波理论,进行了介绍。还介绍了波浪力作用理论,并着重介绍了Morison方程和该方程的适用范围和条件。其次,对于SFT在水中受到的流体力学作用进行了说明。对于海水在SFT周边流动的时候造成的影响进行分析。对变形固体在流场作用下的力学原理、公式和方法进行了分析。然后给出了两种经典的流固耦合解析式,即迭代耦合和直接耦合。最后对上面的力学原理和解析式进行了详细分析,并通过计算机辅助设备ADINA对流固耦合进行了求解和分析。然后描述了悬浮隧道有限元模型的建立过程,并在不同的工况下(不同的悬浮深度,不同的结构断面,不同的η取值,不同的洋流流速)进行了数值模拟。分析的不同影响因素下隧道管体的不同响应,得出了悬浮隧道动力响应的特点。
[Abstract]:Communication straits, traffic buildings on both sides of the Gulf are widely used in different parts of the world. For example, there are a variety of undersea tunnels and bridges across the sea. But these traditional cross-sea passages are not feasible in the face of ultra-wide straits. This is a new mode of communication between the two sides of the sea-the water. The generation of suspended tunnels. The premise. Submerged Floating Tunnel, or submerged Floating Tunnel, is provided, which is an emerging mode of communication between different sea areas. Produced in 20th century, the principle is to achieve tunnel gravity, tunnel buoyancy and tunnel structure between the various forces balance. So that the tunnel can be stabilized at a certain depth of the water. This emerging mode of communication between different sea areas has three advantages: first. The construction of underwater suspended tunnel is limited by geographical factors. This is due to the small impact of SFT on the location of the geographical environment; Second, the traffic time and distance are reduced. Compared with the cross-sea bridge and the submarine tunnel, the SFT has the smallest span between the same straits because of the physical properties of its construction position. Third, the same SFT has the least impact on the ecological environment of the location. Taking these advantages into account, SFT as a new mode of transportation has broad application prospects and market value. This also makes this mode of transportation. It is a new direction of tunnel research. For SFT, this paper makes the following three explorations: first, for the Cnoidal theory. The nonlinear wave theory and linear wave theory, such as Solitary theory, are introduced, and the wave force theory is also introduced. The Morison equation and the applicable scope and conditions of the equation are introduced emphatically. Secondly. The hydrodynamic effect of SFT in water is explained. The effect of seawater flowing around SFT is analyzed. The mechanics principle of deformed solid under the action of flow field is discussed. The formulas and methods are analyzed. Then two classical analytical expressions of fluid-solid coupling are given, that is, iterative coupling and direct coupling. Finally, the mechanics principle and analytical formula above are analyzed in detail. The finite element model of the suspension tunnel is established and analyzed by ADINA convection-solid coupling. The finite element model of the suspension tunnel is established under different conditions (different depth of suspension). Different structural sections, different 畏 values and different ocean current velocities are numerically simulated. The characteristics of the dynamic response of the suspended tunnel are obtained by analyzing the different effects of different factors on the response of the tunnel tube.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U451

【参考文献】