裂纹梁损伤识别的一种新型方法

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。

A New Method of Cracked Beam Damage Identification

A new structural damage identification method based on energy density was put forward based on energy finite element method. Basic building blocks, beams of engineering structures were taken as research objects and energy density mutations as the damage identification index to simulate the damage structure. The most common form of structural damage, cracks beam damage identification test was carried out. The results showed that the damage identification method proposed is applicable to medium and high frequencies, sensitive to small defects of the structure; it has the advantages of simple operation, high accuracy, and without the complexity of data processing; it has high engineering values.