基于模态参数的工程结构损伤识别方法

Engineering structures damage detection based on modal parameter estimation

介绍了结构故障诊断的技术手段以及应用振动诊断进行结构损伤识别的研究现状。应用有限元程序进行模态分析和频响分析,得到在不同损伤度的条件下轮对局部模态频率和振幅幅值的变化趋势。提出基于频率移动和模态振型变化来判断结构损伤。

This paper summarizes the technique means of fault diagnosis and damage identification for structure, and the present research and application of damage identification for structure with vibration diagnosis technique. Based on finite element method, it is obtained to the trend of part modal frequency and the amplitude by simulating different extent of damage. The way based on frequency and modal change to identify structure damage is given out.