基于结构动力特性的损伤检测可视化方法

Visualization method for structural damage detection based on its dynamic characteristics

提出基于结构动力响应的损伤识别多指标分层及融合可视化展示方法,使结构的损伤信息以可视化的图像直观地展示出来。以简支梁为研究对象,应用当前发展成熟的多个指标对单裂纹和双裂纹分别进行分层展示。应用自适应加权最小二乘法对多层图像进行融合可视化,解决了单一指标得到可视化结果仅能包含有限的损伤信息,容易造成漏判的缺点,使得融合结果更加精确。基于结构动力特性的损伤检测可视化将为结构损伤识别和健康监测提供新的展示平台。

The method of hierarchical visualization and visualization fusion for vibration-based structural damage detection was put forward. This method could display structural damage information visually using visual images. Taking a simply supported beam for example, the hierarchical images were obtained using four currently mature indexes for one damage and two damages, respectively. The hierarchical images were fused with the auto-adaptive weighted least square method, they avoided the weakness that the visual image of a single index only contained limited damage information. So, the results were more accurate. The visualization of vibration-based structural damage detection provided a new display platform for damage detection and structural health monitoring.