摘要
本文针对输电塔架结构的损伤特点,采用优化等效的方法,建立了具有螺栓松动损伤的输电塔结构的有限元模型,同时提出了此结构螺栓松动损伤诊断基于应变模态的改进的模糊模式识别方法。通过距离贴近度与相似贴近度的双重识别,可达到对输电塔架结构螺栓松动损伤的位置和程度的诊断。对湘江输电塔架结构的数值仿真分析,表明本文提出的损伤诊断方法的结果是令人满意的,具有实际工程应用价值。
In this paper, adopting the optimization equivalent method, the finite element model of transmission tower structure with bolted looseness-damage is set up according to the damaging characteristic of this tower structure. An updating detection approach to fuzzy-pattern identification based on strain mode is also presented to locate the specific bolted looseness damage by the reduplicative detection of distance nest degree and proportion nest degree. Performance of the proposed damage detection approach is demonstrated by the analysis of Xiang jiang transmission tower structure.
出处
《地震工程与工程振动》
CSCD
北大核心
2006年第6期138-143,共6页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(50378074)
关键词
输电塔
螺栓松动损伤
模糊模式识别
应变模态
transmission tower structure
bolted looseness damage
fuzzy mode identification
strain mode
作者简介
瞿伟廉（1946-），男，教授；主要从事结构振动控制和结构安全预警的研究．
