水下悬浮隧道锚索松弛—张紧过程中的动态张力研究

发布时间：2018-08-02 18:45

【摘要】：如今,虽然水下悬浮隧道在世界上还没有完成一项具体的工程,但是由于它在深水域跨越方面的综合优势,专家学者们对于水下悬浮隧道相关方面的研究也越来越广泛。遗憾的是,水下悬浮隧道锚索松弛-张紧过程中的动态张力问题研究的甚少,而锚索的冲击张力对水下悬浮隧道的破坏却很大,因此,希望本文对锚索的动态张力研究可为水下悬浮隧道的后期研究提供一定的参考价值。本文从水下悬浮隧道锚索的静态、动态计算及影响因素三个方面展开了讨论。主要内容如下:(1)从理论概述和结构分析两大方向简述了水下悬浮隧道在国内外的各方面的探究情况。(2)对锚索的四种布置方法和应力波的基本理论展开了阐述,其中,介绍了应力波的形成条件和相关的传播方法。(3)分别对锚索的静态构形示意图和动态构形示意图进行了受力分析,得到了锚索的静、动态构形图,然后利用哈密顿原理和能量法分析了动态作用下锚索所做的功。(4)根据对锚索做功的总结,推导了水下悬浮隧道锚索的非线性运动方程,同时还考虑了锚索的外部作用力。接着运用伽辽金方法对此运动方程进行了化简,再利用MATLAB软件编制程序求解方程,描绘出了锚索运动响应曲线图。(5)对锚索的端部简谐激励和应变的传播进行了分析,接着就锚索松弛、松弛-张紧和张紧三种情况分别进行了计算分析。其中,还初步地探讨了锚索-管体可能会发生参数共振运动的限制条件。(6)展开了锚索的位置、激励频率、激励幅值及它的长度等因素对锚索动态张力影响的探讨。
[Abstract]:At present, although the underwater suspended tunnel has not completed a specific project in the world, but because of its comprehensive advantages in deep water crossing, experts and scholars have more and more research on the relevant aspects of underwater suspended tunnel. Unfortunately, there is little research on dynamic tension in the process of loose-tensioning of anchor cable in underwater suspended tunnel, but the impact tension of anchor cable has great damage to underwater suspended tunnel. It is hoped that the study of dynamic tension of anchor cable in this paper can provide some reference value for the later study of underwater suspended tunnel. In this paper, the static state, dynamic calculation and influencing factors of anchor cable in underwater suspension tunnel are discussed. The main contents are as follows: (1) the research situation of underwater suspended tunnel at home and abroad is briefly described from two aspects: (1) the theoretical overview and structural analysis. (2) the four arrangement methods of anchor cable and the basic theory of stress wave are expounded, among which, The forming conditions of stress wave and the related propagation methods are introduced. (3) the static configuration diagram and dynamic configuration diagram of anchor cable are analyzed respectively, and the static and dynamic configuration diagram of anchor cable are obtained. Then the work of anchor cable under dynamic action is analyzed by using Hamiltonian principle and energy method. (4) according to the summary of work done by anchor cable, the nonlinear motion equation of anchor cable in underwater suspension tunnel is derived, and the external force of anchor cable is also considered. Then, the equations of motion are simplified by Galerkin method, and then solved by MATLAB software, and the curve of response of cable motion is described. (5) the harmonic excitation and the propagation of strain at the end of the cable are analyzed. Then the relaxation of anchor cable, relaxation-tensioning and tensioning are calculated and analyzed respectively. Among them, the limiting conditions of the possible parametric resonance motion of the cable and tube are discussed. (6) the influence of the position of the cable, the excitation frequency, the amplitude of the excitation and the length of the cable on the dynamic tension of the cable is discussed.
【学位授予单位】：聊城大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U459.5

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