基于动力特性的输电塔结构损伤识别研究  

Damage Identification for Structural of Transmission Tower Based on Dynamic Characteristics

作　　者：屈成忠[1] 路翎 王玉莹 

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012 [2]国网技术学院,山东济南250002

出　　处：《水电能源科学》2014年第12期162-165,共4页Water Resources and Power

摘　　要：准确识别输电塔结构的损伤位置和损伤程度,对输电塔检修工作和电网安全运行具有重要的工程意义。针对输电塔结构特点,为提高识别精度,提出了一种新的输电塔结构损伤二步识别法,即以输电塔的动力分析为基础,将曲率模态和模态应变能作为指标,分损伤定位和定量两步识别输电塔损伤位置和损伤程度,并以某220kV输电塔为例,验证了该方法的可靠性并分析了不同损伤程度、损伤位置对识别精度的影响。结果表明,该方法能够准确地识别出输电塔的损伤位置和损伤程度。Transmission tower is an important part of the grid. Identifying the position and degree of the structure in-jury accurately is vital to the maintenance and operation of transmission tower. Considering the structure characteristics,this paper presents a new two-step method of structure damage identification of transmission tower for improving the i-dentification accuracy. Based on the dynamic analysis of transmission tower, two steps of damage position and ration areindentified by taking the curvature mode and modal strain energy as the indicator. Taking 220 kV transmission tower foran example, the reliability of this method is verified, and the impact of different damage degree and position on identifica-tion accuracy is analyzed. The result shows that the method can accurately identify the damage position and degree of thetransmission tower.

关 键 词：输电塔 损伤识别 曲率模态 模态应变能 

分 类 号：TM754[电气工程—电力系统及自动化]