| 刘慕广*,黄琳玲,邹云峰.雷暴冲击风下输电塔风振特性试验研究[J].实验力学,2018,33(6):869~876 |
| 雷暴冲击风下输电塔风振特性试验研究 |
| Experimental investigation on dynamic response of transmission tower under downburst winds |
| 投稿时间：2018-05-07 修订日期：2018-06-15 |
| DOI：10.7520/1001-4888-18-096 |
| 中文关键词: 风洞试验 风振响应 气弹模型 雷暴冲击风 输电塔 |
| 英文关键词:wind tunnel experiment wind-induced response aeroelastic model thunderstorm impact wind power transmission tower |
| 基金项目:中央高校基本科研业务费专项资金(2015ZZ018)；高速铁路建造技术国家工程实验室开放基金(2017HSR06) |
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| 中文摘要: |
| 基于自主开发的试验装置,在常规边界层风洞中实现了大比例稳态雷暴冲击风剖面的模拟，并以输电塔气弹模型为研究对象，采用非接触式位移测量仪测量模型的风振响应，分析了不同类型雷暴冲击风场下输电塔的平均位移特性，并与常规B类风场下的风振特性进行了对比。试验结果显示，输电塔的风振响应均以两个方向的一阶弯曲振型为主，扭转响应和高阶弯曲响应不显著。随风速增加，不同风场下输电塔位移响应均呈抛物线趋势增大，最大风速处于塔头部位的冲击风场引起的输电塔位移响应明显高于最大风速处于塔身中部冲击风下的响应值，B类风场下的响应介于两类冲击风场间，且不同风场下位移响应间的差距也随风速增加不断增大。 |
| 英文摘要: |
| Based on self-developed experimental device, the simulation of large-scale steady state thunderstorm impact wind profile is realized in conventional boundary layer wind tunnel has been realized in this paper. Taking aeroelastic model of power transmission tower as study object, the average displacement characteristics of power transmission tower under different types of thunderstorm impact wind field are analyzed by using a non-contact displacement measuring instrument to measure the wind-induced vibration response of the model. The characteristics of wind-induced vibration are compared with those of conventional wind field category B. Experimental results show that the wind-induced vibration response of power transmission towers is mainly first-order bending mode along both directions, while torsional response and high-order bending response are not significant. With the increase of wind speed, the displacement response of power transmission tower increases parabolic type increase in different wind fields. The displacement response of power transmission tower caused by the maximum wind velocity at the head of the tower is significantly higher than that caused by the maximum wind velocity at the middle of tower. The response under category B is between two types of thunderstorm impact wind. In addition, the difference of displacement response under different wind fields is also increasing with the increase of wind speed. |
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