基于图像识别与有限元分析的输电塔杆件损伤评估  

Damage Assessment of Transmission Tower Members Based on Image Recognition and Finite Element Analysis

作　　者：陈科技 李先哲 黄铭枫[2] 王彦博 楼文娟[2] 卞荣 CHEN Keji;LI Xianzhe;HUANG Mingfeng;WANG Yanbo;LOU Wenjuan;BIAN Rong(State Grid Zhejiang Economic Research Institute,Hangzhou 310008,China;Institute of Structural Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]国网浙江省电力有限公司经济技术研究院,杭州310008 [2]浙江大学结构工程研究所,杭州310058

出　　处：《工业建筑》2024年第11期1-8,共8页Industrial Construction

基　　金：国网浙江省电力有限公司经济技术研究院自建专项(JY02202275)。

摘　　要：提出一种基于图像识别与有限元分析的输电塔杆件损伤评估方法,针对受损杆件,利用现场巡检获取的图像,结合边缘检测和线性拟合等步骤来定位杆件轮廓,对杆件的弯曲程度和状态进行定量评估,该方法在杆件交叉和节点板等复杂情况下也表现出较好的鲁棒性。针对未受损杆件,在有限元模型中设定损伤工况,构建了一种杆件重要性分析方法,可准确定位损伤杆件的牵连杆件位置。输电塔倒塌计算与失效路径分析表明,杆件的初始损伤会改变输电塔倒塌的失效路径,损伤杆件的牵连杆件存在提前失效的风险,进一步验证了杆件重要性分析方法的准确性。A damage assessment method for transmission tower members based on image recognition and finite element analysis was proposed.For damaged members,based on the images obtained from on-site inspection,combined with edge detection and curve fitting to locate the member contour,the bending and state of members could be quantitatively assessed.This method showed good robustness in complex conditions such as members crossing and existence of gusset plates.For undamaged members,a member importance analysis method was proposed by setting the damage conditions in the finite element model,which could accurately locate the position of associated element.Transmission tower collapse calculation and failure path analysis showed that initial damage to the tower member would change the failure path of transmission tower collapse.The associated elements of damaged elements had the risk of early failure,which further verified the accuracy of the member importance analysis method.in this paper.The method of this paper is informative for the state assessment of damaged transmission towers as well as the monitoring and reinforcement of elements after damage.

关 键 词：输电塔 图像识别 杆件重要性 损伤评估 失效路径 

分 类 号：TM75[电气工程—电力系统及自动化] TP391.41[自动化与计算机技术—计算机应用技术]