模态柔度指标在简支梁桥损伤识别中的应用

Application of Modal Flexibility Index in Damage Identification of Simply Supported Girder Bridg

基于模态柔度理论,构造模态柔度差及模态柔度差曲率指标为损伤识别参数。选取简支梁桥为数值模拟算例,对单位置及多位置损伤识别工况的数值模拟分析验证了两个指标的有效性。结果表明:模态柔度差曲率指标更适合于结构的损伤位置识别。

Based on the theory of modal difference curvature and mark them as damage flexibility, build modal flexibility difference and modal flexibility identification parameters. Taking simply supported girder bridge for numerical simulation example, through numerical simulation analysis on single - spot and multiple - spot damage identification operating condition, the effectiveness of two parameters have been verified. The result shows： modal flexibility difference curvature parameter is more suitable for structural damage identification.