柔度曲率法在输电塔损伤识别中的应用

在结构指纹识别方法中,基于柔度法的损伤识别方法能够较好地识别损伤所在位置及程度,在柔度法的基础上构建柔度曲率损伤识别指标及柔度矩阵曲率差损伤识别指标,并将其引入到输电塔结构损伤识别中。由于输电铁塔具有三个平动分量,所构建的两种损伤识别指标也具有三个方向分量,其在输电塔上的识别效果需要进一步分析。建立51 m酒杯型输电塔模型,分别采用两种指标对结构不同程度的单损伤及多损伤进行识别。研究结果表明,仅结构垂直方向分量的损伤识别指标能够识别结构损伤,但柔度曲率对于小损伤位置无法识别;柔度矩阵曲率差对小损伤位置也能较好地进行识别。

Application of Flexibility Curvature Method in Damage Detection of Transmission Towers

In the structure of fingerprint identification and damage identification method based on flexibility method can used to identify the damage location and degree. Therefore, the flexibility curvature method and the flexibility curvature matrix difference method is introduced to the damage identification of transmission tower to. Using ANSYS to establish the model of 51 meters high glass type transmission tower, two methods are used to identify the single damage and multi damage of different degrees of structure. The results show that can only use the flexibility matrix of the vertical component of the structure to structure damage identification,When identifying, two kinds of indexes have good effect, but the flexibility curvature method for small damage does not recognize; flexibility matrix curvature difference method can better identify the little damage to the set.