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在能量有限元法研究基础上,提出了基于能量密度的结构损伤识别方法。以工程结构基本构件梁为研究对象,以能量密度突变作为损伤识别指标,对损伤结构进行了仿真;在此基础上,对结构损伤中最常见的形式——裂纹进行损伤识别试验。结果表明基于能量密度的损伤识别方法适用于中高频场合,具有对结构微小缺陷敏感、操作简便、精确度高、无需复杂数据处理等优点,有较高的工程应用价值。
Based on the study of energy finite element method, a structural damage identification method based on energy density is proposed. Taking the basic component beam of engineering structure as the research object and using the abrupt change of energy density as the damage identification index, the damage structure is simulated. Based on this, the damage identification test, the most common form of structure damage, is carried out. The results show that the damage identification method based on energy density is suitable for medium and high frequency applications. It has the advantages of being sensitive to tiny structural defects, easy to operate, high precision and without complicated data processing. It has high engineering application value.