输电塔线耦联体系在风作用下的响应分析

发布时间：2018-05-09 08:26

本文选题：输电塔线耦联体系 + 仿真找形　；参考：《辽宁工程技术大学》2014年硕士论文

【摘要】：输电塔线体系的作用是传输和分配电力,确保塔线体系的安全运行有着十分重要的意义。塔线体系跨度大、结构高、整体结构柔性强,该结构体系对风荷载作用十分敏感。并且,在风荷载作用下导线产生动张力与塔架发生“耦合”现象。因此,对输电塔线耦联体系的风作用研究具有重要的实际意义。本文在ANSYS环境中建立了“三塔两线”塔线耦联体系模型,提出导线仿真找形方法,此方法计算得出导线相关数据与导线规范找形计算结果进行对比分析,从而验证了仿真找形的正确性、简单性；然后对单塔和塔线耦联体系进行了模态分析,得出各自振动频率及振型特点,在振动过程中,导线的影响是不可忽略的。在本文中,模拟脉动风速时程曲线是在Matlab环境中进行的,并根据Davenport谱,基于谐波叠加法,进而得到输电塔各高度处的脉动风速；在此基础上,模拟得出了不同风向角和风攻角对单塔及塔线耦联体系作用时的位移及加速度响应,将单塔的数据与塔线耦联体系的数据对比,进一步证明了体系的“耦联”性；又分析得出最不利风向角和风攻角,最不利风工况是设计输电塔线体系过程中需要考虑的因素之一,因此本文为输电塔线耦联体系下的风工程的研究提供了一定理论依据。
[Abstract]:The function of transmission tower system is to transmit and distribute electric power. It is very important to ensure the safe operation of tower line system. The tower-line system has the advantages of large span, high structure and strong flexibility. The structure system is sensitive to wind load. Furthermore, the dynamic tension of the conductor and the tower are coupled under the wind load. Therefore, it is of great practical significance to study the wind action of transmission tower line coupling system. In this paper, the "three-tower and two-wire" tower line coupling system model is established in ANSYS environment, and a traverse simulation method is proposed. The results of traverse related data and traverse specification are compared and analyzed by this method. The simulation results verify the correctness and simplicity of the simulation, and then the modal analysis of the single tower and tower line coupling system is carried out, and the characteristics of vibration frequency and mode shape are obtained. The influence of the conductor can not be ignored during the vibration process. In this paper, the time history curve of simulated pulsating wind speed is carried out in Matlab environment. According to Davenport spectrum and harmonic superposition method, the fluctuating wind speed at different heights of transmission tower is obtained. The displacement and acceleration responses of different wind direction angles and wind attack angles to single tower and tower line coupling system are obtained by simulation. The data of single tower are compared with those of tower line coupling system, and the "coupling" property of the system is further proved. It is also found that the most unfavorable wind direction angle and wind attack angle, the most unfavorable wind condition is one of the factors to be considered in the design of transmission tower line system, so this paper provides a certain theoretical basis for the study of wind engineering under the transmission tower line coupling system.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU311.3

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