基于振动分析的结构损伤检测方法研究

Research on Methods of Vibration-Based Structure Damage Detection

对近年来结构基于振动的损伤识别方法的发展概况和最新进展进行了总结。主要介绍基于固有频率、位移振型、曲率模态振型、应变模态振型的损伤识别技术和BEE法,分析其各自的优缺点。在此基础上,展开基于模态参数识别的航空发动机零部件结构损伤检测的研究,提出综合运用有限元法、实验模态分析和神经网络法对结构损伤进行检测的方法,并取得初步结论。最后对该研究领域的未来发展进行了展望。

The paper summarizes the recent development of methods of vibration-based structure damage detection, The technologies of structure damage detection based on nature frequency,displacement mode shape,curvature mode shape,strain mode shape and BEE are mainly demonstrated and the advantages and disadvantages of ways and means mentioned above are analyzed. Based on it,a research on ＂structure damage detection of aero-engine parts based on modal parameters identification＂ is being done in which finite element method,experimental modal analysis and artificial neural network are integrated into the method of structure damage detection. Some elementary conclusions are drawn. Finally, the prospect of vibration-based damage identification is also presented.