基于动力特性的输电塔结构损伤识别研究
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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 injury 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 identification accuracy.Based on the dynamic analysis of transmission tower,two steps of damage position and ration are indentified by taking the curvature mode and modal strain energy as the indicator.Taking 220 kV transmission tower for an example,the reliability of this method is verified,and the impact of different damage degree and position on identification accuracy is analyzed.The result shows that the method can accurately identify the damage position and degree of the transmission tower.
引文
[1]瞿伟廉,秦文科.输电塔法兰联结节点螺栓松动损伤诊断改进的模糊模式识别方法[J].地震工程与工程振动,2006,26(6):138-143.
    [2]刘纲,杨溥,秦阳,等.酒杯型输电塔损伤定位的识别方法[J].振动、测试与诊断,2012,32(3):471-476,519.
    [3]郭惠勇,薛晓武,李正良,等.采用应变能方法定量分析输电塔损伤程度[J].重庆大学学报,2012,35(12):94-99.
    [4]屈成忠,连旭伟,于游江.基于HHT的输电塔结构损伤识别[J].水电能源科学,2011,29(1):146-147,145.
    [5]刘春城,苏玉成,毛绪坤,等.小波包和神经网络在输电铁塔损伤检测中的应用[J].水电能源科学,2012,30(11):170-173,90.
    [6]Yin T,Lam H F,Chow H M,et al.Dynamic Reduction-based Structural Damage Detection of Transmission Tower Utilizing Ambient Vibration Data[J].Engineering Structures,2009,31(9):2 009-2 019.
    [7]Fish J,Schwob C.Towards Constitutive Model Based on Atomistics[J].International Journal of Multiscale Computational Engineering,2003,1:43-56.
    [8]霍中艳,张岚.基于结构振动参数的损伤识别法[J].水电能源科学,2009,27(4):104-107.

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